ICD-10 · PDGM grouping
M26 Dentofacial anomalies [including malocclusion]
All 78 codes in the M26 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
78
Can lead a claim
6
Cannot lead a claim
72
What CMS assigns to M26
6 of the 78 codes group to Musculoskeletal Rehabilitation; 72 are assigned no clinical group. None of the 78 is assigned a comorbidity subgroup. 6 of the 78 can lead a claim.
Every code in M26
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| M26.0 Major anomalies of jaw size | ||||
| M26.00 | Unspecified anomaly of jaw size | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.01 | Maxillary hyperplasia | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.02 | Maxillary hypoplasia | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.03 | Mandibular hyperplasia | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.04 | Mandibular hypoplasia | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.05 | Macrogenia | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.06 | Microgenia | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.07 | Excessive tuberosity of jaw | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.09 | Other specified anomalies of jaw size | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.1 Anomalies of jaw-cranial base relationship | ||||
| M26.10 | Unspecified anomaly of jaw-cranial base relationship | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.11 | Maxillary asymmetry | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.12 | Other jaw asymmetry | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.19 | Other specified anomalies of jaw-cranial base relationship | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.2 Anomalies of dental arch relationship | ||||
| M26.20 | Unspecified anomaly of dental arch relationship | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.21 Malocclusion, Angle's class | ||||
| M26.211 | Malocclusion, Angle's class I | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.212 | Malocclusion, Angle's class II | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.213 | Malocclusion, Angle's class III | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.219 | Malocclusion, Angle's class, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.22 Open occlusal relationship | ||||
| M26.220 | Open anterior occlusal relationship | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.221 | Open posterior occlusal relationship | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.23 | Excessive horizontal overlap | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.24 | Reverse articulation | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.25 | Anomalies of interarch distance | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.29 | Other anomalies of dental arch relationship | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.3 Anomalies of tooth position of fully erupted tooth or teeth | ||||
| M26.30 | Unspecified anomaly of tooth position of fully erupted tooth or teethCMS: Unsp anomaly of tooth position of fully erupted tooth/teeth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.31 | Crowding of fully erupted teeth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.32 | Excessive spacing of fully erupted teeth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.33 | Horizontal displacement of fully erupted tooth or teeth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.34 | Vertical displacement of fully erupted tooth or teeth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.35 | Rotation of fully erupted tooth or teeth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.36 | Insufficient interocclusal distance of fully erupted teeth (ridge)CMS: Insufficient interocclusal distance of fully erupted teeth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.37 | Excessive interocclusal distance of fully erupted teeth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.39 | Other anomalies of tooth position of fully erupted tooth or teethCMS: Oth anomalies of tooth position of fully erupted tooth/teeth | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.4 | Malocclusion, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.5 Dentofacial functional abnormalities | ||||
| M26.50 | Dentofacial functional abnormalities, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.51 | Abnormal jaw closure | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.52 | Limited mandibular range of motion | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.53 | Deviation in opening and closing of the mandible | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.54 | Insufficient anterior guidance | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.55 | Centric occlusion maximum intercuspation discrepancy | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.56 | Non-working side interference | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.57 | Lack of posterior occlusal support | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.59 | Other dentofacial functional abnormalities | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.6 Temporomandibular joint disorders | ||||
| M26.60 Temporomandibular joint disorder, unspecified | ||||
| M26.601 | Right temporomandibular joint disorder, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.602 | Left temporomandibular joint disorder, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.603 | Bilateral temporomandibular joint disorder, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.609 | Unspecified temporomandibular joint disorder, unspecified sideCMS: Unspecified TMJ joint disorder, unspecified side | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.61 Adhesions and ankylosis of temporomandibular joint | ||||
| M26.611 | Adhesions and ankylosis of right temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.612 | Adhesions and ankylosis of left temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.613 | Adhesions and ankylosis of bilateral temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.619 | Adhesions and ankylosis of temporomandibular joint, unspecified sideCMS: Adhesions and ankylosis of TMJ joint, unspecified side | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.62 Arthralgia of temporomandibular joint | ||||
| M26.621 | Arthralgia of right temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.622 | Arthralgia of left temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.623 | Arthralgia of bilateral temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.629 | Arthralgia of temporomandibular joint, unspecified side | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.63 Articular disc disorder of temporomandibular joint | ||||
| M26.631 | Articular disc disorder of right temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.632 | Articular disc disorder of left temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.633 | Articular disc disorder of bilateral temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.639 | Articular disc disorder of temporomandibular joint, unspecified sideCMS: Articular disc disorder of TMJ joint, unspecified side | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.64 Arthritis of temporomandibular joint | ||||
| M26.641 | Arthritis of right temporomandibular joint | Can lead a claim | E | None |
| M26.642 | Arthritis of left temporomandibular joint | Can lead a claim | E | None |
| M26.643 | Arthritis of bilateral temporomandibular joint | Can lead a claim | E | None |
| M26.649 | Arthritis of unspecified temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.65 Arthropathy of temporomandibular joint | ||||
| M26.651 | Arthropathy of right temporomandibular joint | Can lead a claim | E | None |
| M26.652 | Arthropathy of left temporomandibular joint | Can lead a claim | E | None |
| M26.653 | Arthropathy of bilateral temporomandibular joint | Can lead a claim | E | None |
| M26.659 | Arthropathy of unspecified temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.69 | Other specified disorders of temporomandibular joint | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.7 Dental alveolar anomalies | ||||
| M26.70 | Unspecified alveolar anomaly | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.71 | Alveolar maxillary hyperplasia | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.72 | Alveolar mandibular hyperplasia | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.73 | Alveolar maxillary hypoplasia | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.74 | Alveolar mandibular hypoplasia | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.79 | Other specified alveolar anomalies | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.8 Other dentofacial anomalies | ||||
| M26.81 | Anterior soft tissue impingement | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.82 | Posterior soft tissue impingement | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.89 | Other dentofacial anomalies | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M26.9 | Dentofacial anomaly, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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