M60.18 is the authoritative medical code for Interstitial myositis, other site. This classification is used in medical billing and clinical recording to specify the clinical criteria for interstitial myositis, other site (ICD-10-CM M60.18), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Interstitial myositis, other site is a billable ICD-10-CM diagnosis code M60.18. Excludes1 (not coded here): dermatopolymyositis M33.-; myopathy in amyloidosis E85.-; myopathy in polyarteritis nodosa M30.0; myopathy in rheumatoid arthritis M05.32; myopathy in scleroderma M34.-; myopathy in Sjögren's syndrome M35.03; myopathy in systemic lupus erythematosus M32.-. Excludes2 (not included here): inclusion body myositis IBM; muscular dystrophies and myopathies G71-G72.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for M60.18 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- dermatopolymyositis M33.-
- myopathy in amyloidosis E85.-
- myopathy in polyarteritis nodosa M30.0
- myopathy in rheumatoid arthritis M05.32
- myopathy in scleroderma M34.-
- myopathy in Sjögren's syndrome M35.03
- myopathy in systemic lupus erythematosus M32.-
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- inclusion body myositis IBM
- muscular dystrophies and myopathies G71-G72
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with M60.18?
Per Excludes1 instructions, M60.18 must not be reported with: dermatopolymyositis (M33.-); myopathy in amyloidosis (E85.-); myopathy in polyarteritis nodosa (M30.0); myopathy in rheumatoid arthritis (M05.32).
Can M60.18 be reported alongside related conditions?
Per Excludes2 instructions, M60.18 and the following may both be reported when both are present: inclusion body myositis [IBM] (G72.41); muscular dystrophies and myopathies (G71-G72).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as M60.18, with their registry titles.
- M60 — Myositis
- M60.0 — Infective myositis
- M60.000 — Infective myositis, unspecified right arm
- M60.001 — Infective myositis, unspecified left arm
- M60.002 — Infective myositis, unspecified arm
- M60.003 — Infective myositis, unspecified right leg
- M60.004 — Infective myositis, unspecified left leg
- M60.005 — Infective myositis, unspecified leg
- M60.009 — Infective myositis, unspecified site
- M60.01 — Infective myositis, shoulder
- M60.011 — Infective myositis, right shoulder
- M60.012 — Infective myositis, left shoulder
- M60.019 — Infective myositis, unspecified shoulder
- M60.02 — Infective myositis, upper arm
- M60.021 — Infective myositis, right upper arm
- M60.022 — Infective myositis, left upper arm
- M60.029 — Infective myositis, unspecified upper arm
- M60.03 — Infective myositis, forearm
- M60.031 — Infective myositis, right forearm
- M60.032 — Infective myositis, left forearm
- M60.039 — Infective myositis, unspecified forearm
- M60.04 — Infective myositis, hand and fingers
- M60.041 — Infective myositis, right hand
- M60.042 — Infective myositis, left hand
- M60.043 — Infective myositis, unspecified hand
- M60.044 — Infective myositis, right finger(s)
- M60.045 — Infective myositis, left finger(s)
- M60.046 — Infective myositis, unspecified finger(s)
- M60.05 — Infective myositis, thigh
- M60.051 — Infective myositis, right thigh
- M60.052 — Infective myositis, left thigh
- M60.059 — Infective myositis, unspecified thigh
- M60.06 — Infective myositis, lower leg
- M60.061 — Infective myositis, right lower leg
- M60.062 — Infective myositis, left lower leg
- M60.069 — Infective myositis, unspecified lower leg
- M60.07 — Infective myositis, ankle, foot and toes
- M60.070 — Infective myositis, right ankle
- M60.071 — Infective myositis, left ankle
- M60.072 — Infective myositis, unspecified ankle
Indexed Clinical Terms (1)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Myositis, interstitial, specified site NEC
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: