M60.1
Interstitial myositis
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 11 never code together
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
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 4 same parent — M60
Subordinate codes 10
M60.10 Interstitial myositis of unspecified site M60.11 Interstitial myositis, shoulder M60.12 Interstitial myositis, upper arm M60.13 Interstitial myositis, forearm M60.14 Interstitial myositis, hand M60.15 Interstitial myositis, thigh M60.16 Interstitial myositis, lower leg M60.17 Interstitial myositis, ankle and foot M60.18 Interstitial myositis, other site M60.19 Interstitial myositis, multiple sites
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.