ICD-10 Code for Osteomalacia
The ICD-10-CM code for osteomalacia is M83.9 — Adult osteomalacia, unspecified. This is the code the Alphabetic Index gives for osteomalacia with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
M83.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which osteomalacia code should you use?
The Alphabetic Index lists 24 codes under Osteomalacia. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
Osteomalacia adult
Osteomalacia vitamin-D-resistant in adults
| carpus | E83.31 | Familial hypophosphatemia | |
| clavicle | E83.31 | Familial hypophosphatemia | |
| femur | E83.31 | Familial hypophosphatemia | |
| fibula | E83.31 | Familial hypophosphatemia | |
| finger | E83.31 | Familial hypophosphatemia | |
| humerus | E83.31 | Familial hypophosphatemia | |
| ilium | E83.31 | Familial hypophosphatemia | |
| ischium | E83.31 | Familial hypophosphatemia | |
| metacarpus | E83.31 | Familial hypophosphatemia | |
| metatarsus | E83.31 | Familial hypophosphatemia | |
| multiple sites | E83.31 | Familial hypophosphatemia | |
| neck | E83.31 | Familial hypophosphatemia | |
| radius | E83.31 | Familial hypophosphatemia | |
| rib | E83.31 | Familial hypophosphatemia | |
| scapula | E83.31 | Familial hypophosphatemia | |
| skull | E83.31 | Familial hypophosphatemia | |
| tarsus | E83.31 | Familial hypophosphatemia | |
| tibia | E83.31 | Familial hypophosphatemia | |
| toe | E83.31 | Familial hypophosphatemia | |
| ulna | E83.31 | Familial hypophosphatemia | |
| vertebra | E83.31 | Familial hypophosphatemia |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources