M79.0 – Rheumatism, unspecified

ICD-10-CM 2027 diagnosis code · Other soft tissue disorders

Billable code

ICD-10-CM code M79.0

Code: M79.0 (claims format: M790)
Description: Rheumatism, unspecified
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
Block: M70-M79 Other soft tissue disorders
Parent codes: M79

Notes for M79.0

Excludes1 (not coded here):

fibromyalgia (M79.7)
palindromic rheumatism (M12.3-)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

M79 – Other and unspecified soft tissue disorders, not elsewhere classified

Excludes1 (not coded here):

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

Index terms for M79.0

Entries in the ICD-10-CM alphabetic index that lead to this code:

Rheumatism

Related codes in M79

M79.1 – MyalgiaHeader
M79.2 – Neuralgia and neuritis, unspecifiedBillable
M79.3 – Panniculitis, unspecifiedBillable
M79.4 – Hypertrophy of (infrapatellar) fat padBillable
M79.5 – Residual foreign body in soft tissueBillable
M79.6 – Pain in limb, hand, foot, fingers and toesHeader
M79.7 – FibromyalgiaBillable
M79.A – Nontraumatic compartment syndromeHeader
M79.8 – Other specified soft tissue disordersHeader
M79.9 – Soft tissue disorder, unspecifiedBillable

Frequently asked questions

What is ICD-10 code M79.0?

M79.0 is the ICD-10-CM code for rheumatism, unspecified, in the block M70-M79 (Other soft tissue disorders).

Is M79.0 a billable code?

Yes. M79.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M79.0 belong to?

It belongs to category M79 – Other and unspecified soft tissue disorders, not elsewhere classified.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.