M26.02 Maxillary hypoplasia

Instructional Notes:

M26.02
Description: Maxillary hypoplasia
↓
M26.0
Description: Major anomalies of jaw size
Exclude1:
- acromegaly (E22.0)
- Robin's syndrome (Q87.0)
↓
M26
Description: Dentofacial anomalies [including malocclusion]
↓
M26-M27
Description: Dentofacial anomalies [including malocclusion] and other disorders of jaw (M26-M27)
Exclude1:
- hemifacial atrophy or hypertrophy (Q67.4)
- unilateral condylar hyperplasia or hypoplasia (M27.8)
↓
M00-M99
Description: Diseases of the musculoskeletal system and connective tissue
Exclude2:
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Notes:
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition