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ICD-10-CM 2027 diagnosis code

M26.39Other anomalies of tooth position of fully erupted tooth or teeth

✓ Billable / specific

M26.39 is a valid, billable ICD-10-CM code for other anomalies of tooth position of fully erupted tooth or teeth. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Oth anomalies of tooth position of fully erupted tooth/teeth

Looking up by condition? See ICD-10 code for Rake teeth, ICD-10 code for Snaggle teeth.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M26.39

M26.39 is the ICD-10-CM diagnosis code for other anomalies of tooth position of fully erupted tooth or teeth. It belongs to category M26 (dentofacial anomalies [including malocclusion]), block M26-M27 (dentofacial anomalies [including malocclusion] and other disorders of jaw) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within M26.3, choose M26.39 (Other anomalies of tooth position of fully erupted tooth or teeth) only when documentation doesn't support a more specific option: unspecified anomaly of tooth position of fully erupted tooth or teeth (M26.30), Crowding of fully erupted teeth (M26.31), excessive spacing of fully erupted teeth (M26.32), horizontal displacement of fully erupted tooth or teeth (M26.33), vertical displacement of fully erupted tooth or teeth (M26.34), rotation of fully erupted tooth or teeth (M26.35), insufficient interocclusal distance of fully erupted teeth (ridge) (M26.36) and excessive interocclusal distance of fully erupted teeth (M26.37).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC, relative weight 5.6154), DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC, relative weight 4.381), DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC, relative weight 2.7307), DRG 157 (Dental and Oral Diseases with MCC, relative weight 1.809), DRG 158 (Dental and Oral Diseases with CC, relative weight 0.9366) and DRG 159 (Dental and Oral Diseases without CC/MCC, relative weight 0.6893), in Pre-MDC and MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 524.39 (other anomalies of tooth position).

Notes that apply from higher levels

Instructions written at a parent level also apply to M26.39.

› From M26.3 Anomalies of tooth position of fully erupted tooth or teeth
Excludes2
  • embedded and impacted teeth (K01.-)

Broader instructions also apply from M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to M26.39.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 524.39Other anomalies of tooth positionexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about M26.39

Is M26.39 billable?

Yes. M26.39 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M26.39 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M26.39 as a principal diagnosis.

Is M26.39 a CC or MCC?

No. M26.39 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M26.39 group to?

M26.39 is used in the MS-DRG v44.0 logic for MS-DRG 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC), MS-DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC), MS-DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC), MS-DRG 157 (Dental and Oral Diseases with MCC), MS-DRG 158 (Dental and Oral Diseases with CC) and MS-DRG 159 (Dental and Oral Diseases without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for M26.39?

The CMS General Equivalence Mappings map M26.39 to ICD-9-CM 524.39.