M26.39 captures positional anomalies of fully erupted teeth that don't map to a more specific code in the M26.3 subcategory — including tipping, protrusion, retroclination, buccoversion, linguoversion, and related positional variants.
Verified May 8, 2026 · 4 sources ↓
- Status
- Billable
- Chapter
- 13
- Related CPT
- 0
- Region
- Other
Documentation tips
What should appear in the chart to support M26.39.
Source · Editorial brief grounded in 4 cited references ↓
- Specify which tooth or teeth are affected (tooth number, arch, or region) and confirm full eruption status — M26.39 is invalid for impacted or unerupted teeth.
- Name the specific positional anomaly (e.g., proclined incisor, buccoversion, tipping, linguoversion) so auditors can confirm the residual category is appropriate and a more specific M26.3x code does not apply.
- If an occlusal or functional consequence is also documented (e.g., lack of cuspid guidance, marginal ridge discrepancy affecting occlusion), note it explicitly — it supports medical necessity and may require an additional code.
- Document whether the anomaly is congenital or acquired, and whether prior orthodontic or restorative treatment is relevant — this context strengthens coding rationale in audit.
- If embedded or impacted teeth coexist, code K01.- separately; the Excludes2 note permits dual coding when both conditions are clinically present and documented.
Common coding pitfalls
The recurring mistakes coders make with M26.39 and adjacent codes.
Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓
- Assigning M26.39 when a more specific M26.3x code exists — review M26.31 (crowding), M26.32 (displacement), M26.33 (spacing), M26.34 (torsion), M26.35 (transposition), M26.36, and M26.37 before defaulting to M26.39.
- Using M26.39 for impacted or unerupted teeth — those belong under K01.- (embedded and impacted teeth), not M26.3x.
- Confusing tooth position anomalies (M26.3x) with malocclusion codes (M26.2x) or jaw relationship codes (M26.1x) — positional anomaly refers to individual tooth orientation, not the occlusal relationship between arches.
- Failing to document full eruption status, which leaves the residual code unsupported and vulnerable to a specificity-based denial.
Clinical context
Source · Editorial summary grounded in 4 cited references ↓
Use M26.39 when documentation describes an abnormal tooth position of a fully erupted tooth or teeth and no more specific M26.3x code applies. The M26.3 subcategory includes codes for crowding (M26.31), displacement (M26.32), spacing (M26.33), torsion (M26.34), transposition (M26.35), and teeth in infraocclusion or supraocclusion (M26.36–M26.37). M26.39 is the residual code for everything else — proclined or retroclined incisors, buccal or lingual version, interproximal contact loss, tipping, marginal ridge discrepancies, and similar positional findings.
This code sits under parent M26.3 (Anomalies of tooth position of fully erupted tooth or teeth), which carries an Excludes2 note for embedded and impacted teeth (K01.-). That means K01.- codes may be reported alongside M26.39 when both conditions are documented and clinically distinct — but M26.39 itself applies only to teeth that have fully erupted.
M26.39 is most commonly used in oral and maxillofacial surgery, orthodontic, and dental practice settings, but may appear in orthopedic or TMJ-related encounters when dentofacial positional anomalies contribute to jaw dysfunction or occlusal pathology. MS-DRG mapping places it in DRG 157–159 (Dental and oral diseases) for inpatient claims.
Sibling codes
Other billable codes under M26.3 (laterality / anatomic variants).
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 4 cited references ↓
01What's the difference between M26.39 and M26.32 or M26.35?
02Can M26.39 be used for impacted teeth?
03Is M26.39 billable as a primary diagnosis?
04Which MS-DRGs does M26.39 map to for inpatient claims?
05Does M26.39 require a seventh-character extension?
06Can M26.39 appear on an orthopedic or TMJ-related claim?
07What approximate synonyms are indexed to M26.39?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
- 01CDC ICD-10-CM Tabular List 2026 (FY2026, effective October 1, 2025)
- 02icd10data.comhttps://www.icd10data.com/ICD10CM/Codes/M00-M99/M26-M27/M26-/M26.39
- 03aapc.comhttps://www.aapc.com/codes/icd-10-codes/M26.39
- 04icdlist.comhttps://icdlist.com/icd-10/M26.39
Mira AI Scribe
The Mira AI Scribe captures the specific positional anomaly (e.g., proclined incisor, tipping, buccoversion), the affected tooth or teeth with eruption status confirmed, and any functional consequences such as loss of interproximal contact or cuspid guidance. This prevents a vague 'tooth position abnormality' note that auditors flag as insufficient to support M26.39 over a more specific subcategory code.
See how Mira captures M26.39 documentation