M79.81 Nontraumatic hematoma of soft tissue

Billable ICD-10-CM code, FY2026.

Applicable to

• Nontraumatic hematoma of muscle
• Nontraumatic seroma of muscle and soft tissue

Applies from M79 Other and unspecified soft tissue disorders, not elsewhere classified

Excludes1 (never code together)

• psychogenic rheumatism (F45.8)
• soft tissue pain, psychogenic (F45.41)

MS-DRG index

Defines the logic of DRG(s) 555-556 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 729.92 Nontraumatic hematoma of soft tissue

Code annotations containing back-references to M79.81

Back-references to M79.81

• Type 2 Excludes: M62 Other disorders of muscle ("nontraumatic hematoma of muscle (M79.81)")
• Type 2 Excludes: M62.8 Other specified disorders of muscle ("nontraumatic hematoma of muscle (M79.81)")

Diagnosis Index entries for M79.81

• Hematoma (traumatic) (skin surface intact) › nontraumatic › muscle
• Hematoma (traumatic) (skin surface intact) › nontraumatic › soft tissue

Nearby codes

• M79.A22 Nontraumatic compartment syndrome of left lower extremity
• M79.A29 Nontraumatic compartment syndrome of unspecified lower extremity
• M79.A3 Nontraumatic compartment syndrome of abdomen
• M79.A9 Nontraumatic compartment syndrome of other sites
• M79.8 Other specified soft tissue disorders
• M79.81 Nontraumatic hematoma of soft tissue (this code)
• M79.89 Other specified soft tissue disorders
• M79.9 Soft tissue disorder, unspecified