On this page
- The Four Rules That Govern Every Code
- Surface Counting — The Most Commonly Under-coded Service
- Bonded vs Non-Bonded — Different Codes, Different Fees
- Extractions — Simple vs Surgical Is a Documentation Decision
- Root Canal — 6 Codes Per Canal Count, Most Used Only 1
- Scaling vs Root Planing — The Clinical Evidence Must Drive the Code
- Occlusal Appliances — The Highest-Volume Missed Revenue in Most Practices
- High-Value Codes That Already Exist in the Guide — Rarely Offered
- Periodontal Surgery — Crown Lengthening, Grafts & GTR
- Implant-Related Codes — Half the Billing Is Usually Missed
- Diagnosis Codes — Grey Areas That Frequently Cost Revenue
- Adjunctive Services — Report Writing, Bleaching, Consultations
- Space Maintainers — Consistently Underbilled in Every Pediatric Practice
- The 6-Question Chart Note That Defends Every Code
- Five Workflow Changes That Capture Revenue Starting Monday
- Key Takeaways — What Every Team Member Should Know
- Frequently asked questions
The short answer
Under the ODA Suggested Fee Guide, the intent of treatment — not the equipment used — decides the procedure code, and the dentist answers for every claim filed under their UIN. Coding correctly means choosing the best-matching code and documenting the clinical finding, the work done and the images that support it, so the chart can defend the claim on its own.
- Count surfaces per restoration, per material, per appointment: a four-surface composite molar (23324, about $471) is a different code from a one-surface one (23321, about $257).
- Document the surgical element. A flap or tooth sectioning makes an extraction 71201 rather than 71101, and removing bone for crown lengthening is 42451 rather than 42311.
- Root canals have six condition codes per canal count. Calcified canals, retreatment and difficult access are coded up from the baseline, not billed as a basic root canal.
- Night guards for bruxism code to 14611/14612. 14502 is for athletic mouthguards only, and using it for a night guard underbills by about $215.
- Every coded procedure needs a chart note that answers six questions: the finding, the intent, what was performed, consent, the supporting images, and the post-op plan.
Figures are current to the 2026 ODA Suggested Fee Guide. General education for Ontario dental teams, not billing or legal advice. Fees shown are approximate and codes change every year — confirm against the current ODA Suggested Fee Guide, or call ODA Practice Advisory Services, before you submit an unusual claim.
Foundations
The Four Rules That Govern Every Code
The intent of treatment determines the procedure code. The dentist is responsible for the accuracy of every claim that goes out under their UIN.
Intent, not technology
A laser, CAD/CAM, or microscope does not change the code. The intent of treatment determines the code — not the equipment used.
Time = treatment time
Includes: history review, consent, anaesthesia, procedure, post-op instructions, charting. Excludes setup, breakdown, billing.
Best-match code required
When more than one code fits, use the best match. The ODA Guide is not a menu — each procedure has a correct code.
UIN = accountability
Attaching your UIN to a claim means you own its accuracy. Every code must be defensible from the chart note alone.
What this training is — and is not
When in doubt
Call ODA Practice Advisory Services — confidential, free for members.
1-866-739-8099 ext. 3301 · Mon–Fri 8:30 am–4:30 pm
- Choosing the correct code when clinical work genuinely warrants a higher-value code
- Documenting clinical findings so the chart supports the code billed
- Offering clinically appropriate services that are routinely overlooked
- Not: modifying the procedure to fit a higher code
- Not: splitting one appointment into two claims
- Not: using another dentist's UIN or billing for services not performed
Restoration 20000 series
Surface Counting — The Most Commonly Under-coded Service
The ODA Rule
Coding is based on the number of distinct surfaces involved in one restoration, with one material, at one appointment — not the number of discrete restorations placed.
Composite molar (23321–23325) 2026 fees
| Code | Surfaces | Fee (approx.) |
|---|---|---|
| 23321 | 1 surface | ~$257 |
| 23322 | 2 surfaces | ~$321 |
| 23323 | 3 surfaces | ~$386 |
| 23324 | 4 surfaces | ~$471 |
| 23325 | 5 surfaces (max) | ~$498 |
Fee difference: 1 vs 4 surface
+$214 per tooth
Same appointment, legitimately documented.
Upgrade triggers — document these
- Buccal composite wraps past mesial line angle → code B+M = 2-surface (23322), not 1-surface (23321)
- Buccal wraps both line angles → B+M+D = 3-surface (23323)
- Occlusal with proximal box (caries reaches marginal ridge) → OM, OD, or MOD — not just O
- Class IV anterior composite past incisal edge → incisal = a surface (e.g. MI, DI, MID)
- Class V on molar extending to proximal root surface → BM or BD = 2-surface, not 1
Documentation required
Pre-op note: lesion extent (e.g. "MO carious, ICDAS 4, extends past buccal line angle")
Post-op note: surfaces listed explicitly (e.g. "placed bonded composite #16 MOB, 3 surfaces")
Intraoral photo of the prep is the single strongest defence against insurer downcoding.
Restoration 20000 series
Bonded vs Non-Bonded — Different Codes, Different Fees
| Code | Description | Fee |
|---|---|---|
| 21301 | Amalgam core — non-bonded (with crown) | ~$419 |
| 21302 | Amalgam core — bonded (with crown) | ~$446 |
| 23601 | Tooth-coloured core — non-bonded (with crown) | ~$419 |
| 23602 | Tooth-coloured core — bonded (with crown) | ~$446 |
What "bonded" actually means
A genuine bonded protocol requires: acid etch + primer + adhesive + light cure of each increment. Simply using a composite material does not make it bonded — the bonding agent must be placed and cured before the composite.
Chart note trigger phrase
"Scotchbond Universal selective-etch, light-cured per manufacturer protocol, followed by incremental core buildup."
Other bonded vs non-bonded distinctions
- Posterior composites 23211–23225 are the bonded molar/bicuspid series; amalgam 21211–21225 posterior codes exist too — don't mix series
- Retentive pins (21401–21405) are in addition to the restoration code — often forgotten entirely
- Prefabricated posts (25731–25733) are in addition to the restoration code — same issue
Crown with post & core — checklist
Crown code (27201/27211/27301)
Post code (25731–25733 prefabricated) or (25711–25713 cast)
Core code (21302 or 23602 bonded)
+L for the crown lab
+E for the post material
All five elements are billable. Most offices bill only the crown.
Oral & Maxillofacial Surgery 70000 series
Extractions — Simple vs Surgical Is a Documentation Decision
| Code | Description | Lower fee | Higher fee | Upgrade trigger |
|---|---|---|---|---|
| 71101 71201 | Simple (forceps only) vs surgical extraction requiring flap elevation and/or tooth sectioning | ~$228 | ~$340 | Curved/dilacerated roots; tooth fractures during luxation; flap needed to protect adjacent structure |
| 72211 72221 72231 | Soft tissue impaction → partially bony → fully bony impaction | ~$509 | ~$681–731 | Pre-op PA shows degree of bony coverage; document angulation, depth, adjacent structures |
| 72241 | Coronectomy — deliberate vital root retention to prevent IAN injury (new 2022) | — | ~$731 | CBCT shows IAN contact; informed consent specific to coronectomy; post-op CBCT at 6 months |
| 71101 72311 | Retained root tip (not same procedure as original extraction) | — | ~$129 | Root retained from a prior appointment or prior dentist — different code series from 71101 |
Documentation must explicitly describe the surgical element. "Sectioned with 702 bur mesio-distally due to root divergence noted on pre-op PA." Without this, insurers downgrade to 71101 and the practice cannot dispute it.
Endodontics 30000 series
Root Canal — 6 Codes Per Canal Count, Most Used Only 1
The 6-code structure (per canal count)
| Suffix | Condition | Fee uplift |
|---|---|---|
| 33111 / 33131 / 33141 | Uncomplicated (baseline) | — |
| 33112 / 33132 / 33142 | Difficult access (through crown, limited opening) | +12% |
| 33113 / 33133 / 33143 | Exceptional anatomy (dilaceration, dens-in-dente) | +15% |
| 33114 / 33134 / 33144 | Calcified canals (can't pass size 10 file) | +15% |
| 33115 / 33135 / 33145 | Retreatment — previously completed RCT | +20% |
| 33116 / 33136 / 33146 | Continuation of aborted treatment | +20% |
4-canal molar example
33141 uncomplicated: ~$1,461
33144 calcified canals: ~$1,635
Difference: +$174 per tooth
Upgrade triggers + companion codes often missed
- Sclerosed MB2 that won't take a size 10 file → 33134 calcified. Document: file used, chelator, ultrasonic troughing, microscope.
- Pulp chamber obliteration on PA → calcified canal code. Reference the specific radiograph.
- RCT through existing PFM crown → difficult access (33112/33132/33142). Note: access through crown, alignment challenge, dam isolation.
- Any retreatment of prior GP/endo → always 33115/33125/33135/33145, never the basic RCT code.
- 34602 Enlargement of canal in calcified canals — separately billable when conventional instrumentation fails (~$187). Almost always missed.
- 39211/39212 Access through existing crown — separately billable add-on (~$131).
- 39101 Core buildup for isolation — when a box must be built to hold the rubber dam (~$131).
Critical rule: pulpectomy + RCT same dentist < 3 months
If you open/drain (32311/32314) and complete the RCT within 3 months, you must reduce the RCT fee by ½ the pulpectomy fee. Missing this leads to audit exposure.
Prevention 10000 · Periodontics 40000
Scaling vs Root Planing — The Clinical Evidence Must Drive the Code
The two code series compared
| Code | Service | Fee/unit |
|---|---|---|
| 11111 | Scaling — 1 unit (15 min) | ~$75 |
| 11112 | Scaling — 2 units (30 min) | ~$144 |
| 11114 | Scaling — 4 units (60 min) | ~$264 |
| 11116 | Scaling — 6 units (90 min) | ~$397 |
| 43421 | Root planing — 1 unit / sextant | ~$75 |
| 43422 | Root planing — 2 units / sextant | ~$144 |
Why are the fees the same per unit?
The ODA fee rates are identical for 11111 and 43421 — but root planing is a sextant code with a separate billable entry per sextant, while scaling is a single time-based code for the whole mouth. A full-mouth RP across 6 sextants generates 6 separate billing entries.
49101 is not a routine perio maintenance code
2025 clarification: 49101 is for post-surgical re-evaluation >1 month after surgery, or if performed by a different practitioner. Routine maintenance after SRP uses 01502.
When root planing is the correct code
- Pocket depths ≥4 mm with bleeding on probing in defined sextants
- Radiographic bone loss on current bitewings or PAs
- A documented periodontal diagnosis (Stage I–IV / Grade A–C)
- Subgingival calculus identified and documented
Documentation checklist for root planing
Six-point perio chart with date (pocket depth, BoP, CAL, recession, mobility, furcation)
Radiograph showing bone loss in each sextant billed
Written perio diagnosis signed by dentist
Sextant numbers on the claim
49101 re-evaluation booked 4–8 weeks out
41301/41302 Desensitization — almost never billed
Post-SRP cervical sensitivity treated with Gluma, varnish, oxalates, etc. Codes: 41301 (1 unit) / 41302 (2 units). ~$66/$133. Document: agent used, teeth/sextants treated.
Prevention 10000 series
Occlusal Appliances — The Highest-Volume Missed Revenue in Most Practices
Night guard / bruxism appliance
Per-arch. ~$401 +L. Hard or soft — both code to 14611/14612.
14502 is for athletic mouthguards only. Using 14502 instead of 14611 underbills by ~$215.
TMJ diagnostic / therapeutic appliance
Per-arch. ~$440 +L. For anterior repositioning, flat-plane, deprogrammer. Document: TMJ click/crepitus, pain, opening limitation, muscle tenderness.
Myofascial Pain Dysfunction Syndrome appliance
~$619 +L. For MPDS/TMJD with confirmed myofascial diagnosis. Highest-fee appliance category. Requires documented MPDS diagnosis.
Sleep apnea / MAD appliance
I.C. (independent consideration). Requires polysomnogram (PSG) interpreted by a physician. Without PSG, code as 14611. Document: PSG report on file, AHI, physician referral letter.
Adjustment & repair codes
Adjustment of appliance
Time-based + L. Billable separately after delivery visit.
Direct reline of appliance
Chairside reline when appliance no longer fits. +L if sent to lab.
The workflow opportunity
At every exam, document wear facets. Every patient with wear facets and reported grinding is a night guard candidate. Most practices see 30–40% of active patients fitting this profile.
Underutilized codes · Prevention / Adjunctive
High-Value Codes That Already Exist in the Guide — Rarely Offered
SDF & Remineralization Agent Application
Silver diamine fluoride, CPP-ACFP, MI Paste Plus applied to hard tissue lesions. ~$78/unit + material expense. Indications: caries arrest in pediatric, geriatric, special needs, or high-risk patients.
Icon / Resin Infiltration
For non-cavitated incipient lesions: use 13601 +E (the Icon kit is the +E expense). For post-ortho white spots on anterior teeth: consider 23111 (1-surface composite) if restorative intent. Document: ICDAS score, lesion location, clinical photos before/after.
Sealants vs Preventive Restorative Resin
If the bur entered enamel or dentin (no matter how minimally), code 13411/13419 — PRR is ~$80 and is a higher fee than a sealant (13401). The distinction: any mechanical preparation → PRR.
Non-ionizing caries scanning
Laser fluorescence devices (DIAGNOcam, SoproLife, Logicon). Time-based. Almost never billed. Document device used, teeth scanned, findings.
Nutritional Counselling
~$58/unit. Includes recording and analysis of up to 7-day dietary intake + consultation. Indicated for high-caries-risk, eating disorders, pediatric rampant caries, frequent snackers, dry-mouth patients. Almost zero Ontario GPs bill this routinely.
Individual Oral Hygiene Instruction
~$58/unit. Legitimately billable for new perio patients, new ortho appliance, peri-implant maintenance, uncontrolled diabetics. Document: OHI content, devices demonstrated, patient's baseline status.
Remote Assessment (Virtual Triage)
~$87/unit. New in 2022. Phone or video assessment of a chief complaint. After-hours triage calls, post-op concerns, rural patients. Some private plans now reimburse. Document: time spent, chief complaint, advice given, follow-up plan.
Diagnostic Photographs
~$11/photo. Pre-op intraoral photos for perio, fractured cusps, wear, pre-Invisalign records are billable if diagnostic in intent — not just for marketing. Document: clinical indication for each photo.
Periodontics 40000 series
Periodontal Surgery — Crown Lengthening, Grafts & GTR
Crown lengthening (new 2022)
| Code | Description | Fee |
|---|---|---|
| 42311 | Gingivectomy / gingivoplasty — soft tissue only | ~$577 |
| 42451 | Flap + osteoplasty/ostectomy for crown lengthening — per site | ~$779–971 |
When is 42451 the correct code?
Any time bone is removed to establish biologic width before a crown impression. If you only cut soft tissue (gingivectomy), use 42311. If you open a flap and remove bone — even a small amount — 42451 is required. Document: pre-op PA, intra-op photos, biologic width measurement, 6–8 week healing interval.
Soft tissue grafts (per site)
42511 Pedicle graft: ~$904
42521 Free gingival graft: ~$904
42561 Autograft — free connective tissue (includes harvest): ~$1,489
42562 Allograft: ~$934
42552 Allograft for root coverage: ~$934
Autograft (42561) costs 59% more than allograft (42562) for the same recipient site — and is the more evidence-based option for root coverage.
Guided tissue regeneration & bone grafts
| Code | Description | Fee |
|---|---|---|
| 42701 | GTR — non-resorbable membrane / site | ~$898 |
| 42702 | GTR — resorbable membrane / site | ~$898 |
| 42703 | GTR membrane removal (re-entry, non-resorbable) | ~$238 |
| 42721 +E | Biologics / PRF / materials (no flap included) | ~$559 |
| 42621 +E | Osseous allograft, with flap entry and closure | ~$1,559 |
42621 vs 42721 — most common confusion
42621 includes surgical entry + closure. Use when you are performing the full grafting procedure including raising a flap.
42721 is the material-only code (PRF, growth factor, membrane) used in addition to another surgical entry code when the materials are placed during a separately coded procedure.
- Socket preservation at time of extraction: bill the extraction code + 42721 +E (material only, since the socket is already open)
- Sinus lift lateral window: 42621 (graft with flap) + 42721 (membrane/PRF, in addition) + +E for each material
- Bone graft membrane removal at second stage: 42703
Diagnosis 00000 series · Edge Cases
Diagnosis Codes — Grey Areas That Frequently Cost Revenue
Examination codes — common errors
- 01101 vs 01102 vs 01103 — Complete exam codes differ by dentition stage, not patient age. A 7-year-old in mixed dentition is 01102, not 01103. Insurers downgrade based on age of patient vs dentition.
- 01201 (new limited exam, new patient) includes PSR but not full probe score. Useful for emergency new patients. Note: it can create frequency issues if a 01103 complete exam is billed too close after.
- 01204/01205 Specific/Emergency exam — range of ½ to 2 units ($56–$162). Using only the top of the range "without consideration of time" is explicitly described in the Guide as contrary to ODA policy.
Radiograph interpretation codes (2022+)
| Code | Description | Fee |
|---|---|---|
| 02811–02819 | Interpretation of radiographs from another source | ~$93/unit |
| 07031–07039 | CBCT interpretation (per 15-min unit) | ~$93/unit |
| 07021–07029 | CBCT image processing | ~$93/unit |
Frequently forgotten diagnosis codes
Treatment planning (complex cases)
For full-mouth rehabilitation, implant work-ups, complex ortho. Time spent beyond what is implicit in the exam fee is separately billable. Document time.
Cytological smear / brush biopsy
+L +E. Brush biopsy (OralCDx, Oral ID) of suspicious mucosal lesion. Almost never billed in GP practices despite routine performance. Document: lesion description, location, clinical photos.
Soft tissue biopsy (by aspiration / by incision)
+L. Separately billable when a lesion is biopsied and sent to oral pathology lab. 99113 (pathology expense) is the +L pass-through for the lab fee.
Remote assessment — after-hours triage
~$87/unit. Telephone or video triage of a chief complaint. Some private plans reimburse. Document: call duration, CC, advice given, outcome.
Adjunctive General Services 90000 series
Adjunctive Services — Report Writing, Bleaching, Consultations
Reports & forms
Form completion
Insurance forms, disability forms, workplace accident forms. ~$58–$174 depending on complexity. Bill it every time — it costs time.
Written report to third party
Medico-legal reports, specialist referral letters, insurance narratives. ~$87/unit. Underused despite being time-consuming.
Consultation with member of profession
Phone/letter consult with specialist, MD, or another dentist about a shared patient. ~$87/unit. Rarely billed despite regular occurrence.
Whitening / bleaching
In-office vital bleaching
Per 15-min unit. ~$155/unit. A typical 60-min in-office Zoom/Opalescence session = 4 units = ~$620 + materials. +E for bleaching agent.
At-home tray bleaching
Maxillary + mandibular combined. ~$406 +L. The +L covers the lab cost for custom trays.
Non-vital bleaching (internal)
Endodontics series. Time-based internal bleaching post-RCT for a discoloured anterior. Highly underused. Each walking bleach appointment billable separately.
Pass-through expenses
Commercial lab expense (+L)
Pass-through for any commercial lab fee. Must be disclosed to patient. Bill actual cost.
Materials / drug expense
(Renumbered from 99555 in 2025.) Covers implant components, bone substitutes, PRF kits, Icon, SDF, and other material pass-throughs. Bill at actual cost.
Professional service from outside provider
New 2022. Covers fees from outside professionals passed through to the patient (e.g. lab interpretation fees, specialist consultation billed through your practice). Bill actual cost.
Prevention 10000 series · Pediatric
Space Maintainers — Consistently Underbilled in Every Pediatric Practice
| Code | Description | Fee |
|---|---|---|
| 15101 | Band-type, fixed, unilateral | ~$201 |
| 15103 | Soldered lingual arch, bilateral | ~$401 |
| 15201 | Stainless steel crown type, fixed | ~$401 |
| 15401 | Removable acrylic with clasps | ~$252 |
| 15501 | Bonded pontic type | ~$252 |
| 15601 | Maintenance / recementation after 30 days | ~$92 |
| 15603 +L | Repair (incl. recementation) | ~$138 |
When a space maintainer is indicated
Early loss of primary molar before age 9, when the permanent premolar has less than ¾ root formation. Failing to maintain space typically results in orthodontic correction years later — a much larger cost to the patient. The space maintainer at ~$201–$401 is the ethical and cost-effective choice.
Why most practices leave this revenue uncaptured
Most GPs refer the extraction but forget to offer or bill the space maintainer. When the GP does the extraction, the space maintainer conversation should happen at the same appointment. The band-and-loop or Nance appliance can be delivered 2 weeks later.
If referred out, the receiving dentist may or may not place a SM — follow up and offer to manage it in-house.
Habit appliance vs orthodontic appliance
14101/14102 (removable habit appliance, ~$323) = intent is habit cessation (thumb, tongue thrust).
88101–88109 (ortho removable) = intent is tooth movement.
Wrong series = wrong claim. Intent drives the code.
15601 — 30-day rule
Recementation or maintenance within the first 30 days of delivery is included in the original fee. After 30 days, 15601 (~$92) is a separately billable appointment. Most practices never bill this follow-up code.
Compliance
The 6-Question Chart Note That Defends Every Code
Every chart note for a coded procedure should answer these six questions before the claim goes out.
What was the clinical finding?
Pocket depths, lesion ICDAS score, fracture pattern, calcification on PA, root divergence, bony impaction depth.
What was the intent of treatment?
Therapeutic SRP, biologic width restoration, calcified canal negotiation, bonded core placement, coronectomy for IAN protection.
What was actually performed?
Specific surfaces, materials used, flap elevated, bone removed, sectioning performed, adhesive system used, time spent per activity.
What did the patient consent to?
Informed consent including alternatives and risks, specific to the actual procedure performed (not a generic "dental consent").
What images/measurements support the code?
PA, bitewing, CBCT, intraoral photo, perio chart with date, pocket depths, furcation class, mobility grade — linked explicitly to the tooth treated.
What is the post-op plan?
Follow-up appointments, re-evaluation date (e.g. 49101 at 6 weeks for perio), medications, post-op instructions given.
Implementation
Five Workflow Changes That Capture Revenue Starting Monday
1. Code prompts in the software
When a dentist enters an extraction code, the software should prompt: "Was a flap elevated? Was the tooth sectioned? If yes → 71201." Same for composites: "Document surfaces explicitly in the post-op note."
2. End-of-day restoration audit
Treatment coordinator reviews every restoration coded that day against the chart entry. Are the surfaces documented? Was bonding noted for bonded codes? Takes 5 minutes.
3. Hygiene morning huddle
Before each recall, hygienist flags patients with: pockets ≥4 mm (→ root planing?), cervical sensitivity (→ 41301 desensitization?), white spots (→ 13601 SDF or resin infiltration?), wear facets (→ 14611 night guard conversation?).
4. Quarterly chart audit
Pull 10 random charts. Check: code billed vs chart documentation. Track the top 3 documentation gaps. Use them as training topics for the next team meeting. Rotate the auditor role among treatment coordinators.
5. Annual fee guide review (every January)
New codes, deactivated codes, and amended descriptions change every year. The 2026 guide had 30+ changes including new surgery, endo, and sedation codes. Assign one team member to read the changes memo and brief the team.
ODA Practice Advisory — free for members
1-866-739-8099 ext. 3301
Confidential coding questions, Mon–Fri 8:30 am–4:30 pm. Use this before submitting an unusual claim — they will tell you which code applies and what documentation is needed. No charge, no judgment.
Summary
Key Takeaways — What Every Team Member Should Know
Count surfaces accurately
- Buccal past line angle = 2 surfaces
- Occlusal with proximal box = 2+ surfaces
- Class IV past incisal edge = incisal counts
- Always document surfaces in the post-op note
- Intraoral photo of prep = best defence
Document the surgical element
- Flap elevated OR tooth sectioned = 71201 (not 71101)
- Bone removal for crown lengthening = 42451 (not 42311)
- Calcified canal that resists #10 file = 33134/33144
- Retreatment of prior RCT = 33115–33146, never 33111
- Access through existing crown = 39211/39212 add-on
Offer the underused services
- Night guards (14611) for every bruxer
- SDF (13601) for high-risk patients
- CBCT interpretation (07031) after every CBCT
- Space maintainers for early primary loss
- Desensitization (41301) post-SRP / post-crown prep
- Remote assessment (08011) for after-hours triage
Legitimate billing optimization is not about finding loopholes — it is about accurately reflecting the complexity of what was done, documenting it so the chart stands on its own, and offering patients evidence-based services that improve their oral health. The revenue follows from doing both those things well.
Frequently asked questions
- Does using a laser or CAD/CAM change the ODA procedure code?
- No. The intent of treatment determines the code, not the equipment used. When more than one code fits, use the best match — the fee guide is not a menu, and each procedure has a correct code.
- How do you count surfaces on a composite restoration?
- Coding is based on the number of distinct surfaces involved in one restoration, with one material, at one appointment — not the number of separate restorations placed. A buccal composite that wraps past the mesial line angle is two surfaces (23322), not one (23321), and an occlusal restoration with a proximal box is OM, OD or MOD rather than just O.
- When is an extraction coded as surgical instead of simple?
- When it needed flap elevation, tooth sectioning, or both. The note has to describe the surgical element explicitly — for example, sectioned with a bur because of root divergence seen on the pre-op radiograph. Without that, insurers downgrade the claim to the simple extraction code (71101) and the practice cannot dispute it.
- What is the difference between a night guard code and an athletic mouthguard code?
- Night guards for bruxism, hard or soft, code to 14611 or 14612. Code 14502 is for athletic mouthguards only, so billing it for a bruxism appliance underbills by about $215.
- What does a chart note need to defend a procedure code?
- It should answer six questions before the claim goes out: what the clinical finding was, what the intent of treatment was, what was actually performed, what the patient consented to, which images or measurements support the code, and what the post-op plan is.
- Is coding optimization the same as upcoding?
- No. It means choosing the correct code when the clinical work genuinely warrants a higher-value one, and documenting findings so the chart supports it. It does not mean changing the procedure to fit a higher code, splitting one appointment into two claims, or billing for services that weren't performed.
General education for Ontario dental teams, not billing or legal advice. Fees shown are approximate and codes change every year — confirm against the current ODA Suggested Fee Guide, or call ODA Practice Advisory Services, before you submit an unusual claim.