M26.5
Dentofacial functional abnormalities
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 14 never code together
M26-M27block
M00-M99chapter
Excludes2
- arthropathic psoriasis (L40.5-)L40.5-
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- compartment syndrome (traumatic) (T79.A-)T79.A-
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 1
M00-M99chapter
Notes
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 9 same parent — M26
M26.0 Major anomalies of jaw size category M26.1 Anomalies of jaw-cranial base relationship category M26.2 Anomalies of dental arch relationship category M26.3 Anomalies of tooth position of fully erupted tooth or teeth category M26.4 Malocclusion, unspecified M26.6 Temporomandibular joint disorders category M26.7 Dental alveolar anomalies category M26.8 Other dentofacial anomalies category M26.9 Dentofacial anomaly, unspecified
Subordinate codes 9
M26.50 Dentofacial functional abnormalities, unspecified M26.51 Abnormal jaw closure M26.52 Limited mandibular range of motion M26.53 Deviation in opening and closing of the mandible M26.54 Insufficient anterior guidance M26.55 Centric occlusion maximum intercuspation discrepancy M26.56 Non-working side interference M26.57 Lack of posterior occlusal support M26.59 Other dentofacial functional abnormalities
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.