Other and unspecified soft tissue disorders, not elsewhere classified (M79) ICD-10-CM
The M79 code range covers other and unspecified soft tissue disorders, not elsewhere classified with 66 ICD-10-CM diagnosis codes. 52 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the M79 Range 66 codes · 52 billable
- M79 Other and unspecified soft tissue disorders, not elsewhere classifiedNon-billable
- M79.0 Rheumatism, unspecified
- M79.1 MyalgiaNon-billable
- M79.10 Myalgia, unspecified site
- M79.11 Myalgia of mastication muscle
- M79.12 Myalgia of auxiliary muscles, head and neck
- M79.18 Myalgia, other site
- M79.2 Neuralgia and neuritis, unspecified
- M79.3 Panniculitis, unspecified
- M79.4 Hypertrophy of (infrapatellar) fat pad
- M79.5 Residual foreign body in soft tissue
- M79.6 Pain in limb, hand, foot, fingers and toesNon-billable
- M79.60 Pain in limb, unspecifiedNon-billable
- M79.601 Pain in right arm
- M79.602 Pain in left arm
- M79.603 Pain in arm, unspecified
- M79.604 Pain in right leg
- M79.605 Pain in left leg
- M79.606 Pain in leg, unspecified
- M79.609 Pain in unspecified limb
- M79.62 Pain in upper armNon-billable
- M79.621 Pain in right upper arm
- M79.622 Pain in left upper arm
- M79.629 Pain in unspecified upper arm
- M79.63 Pain in forearmNon-billable
- M79.631 Pain in right forearm
- M79.632 Pain in left forearm
- M79.639 Pain in unspecified forearm
- M79.64 Pain in hand and fingersNon-billable
- M79.641 Pain in right hand
- M79.642 Pain in left hand
- M79.643 Pain in unspecified hand
- M79.644 Pain in right finger(s)
- M79.645 Pain in left finger(s)
- M79.646 Pain in unspecified finger(s)
- M79.65 Pain in thighNon-billable
- M79.651 Pain in right thigh
- M79.652 Pain in left thigh
- M79.659 Pain in unspecified thigh
- M79.66 Pain in lower legNon-billable
- M79.661 Pain in right lower leg
- M79.662 Pain in left lower leg
- M79.669 Pain in unspecified lower leg
- M79.67 Pain in foot and toesNon-billable
- M79.671 Pain in right foot
- M79.672 Pain in left foot
- M79.673 Pain in unspecified foot
- M79.674 Pain in right toe(s)
- M79.675 Pain in left toe(s)
- M79.676 Pain in unspecified toe(s)
- M79.7 Fibromyalgia
- M79.8 Other specified soft tissue disordersNon-billable
- M79.81 Nontraumatic hematoma of soft tissue
- M79.89 Other specified soft tissue disorders
- M79.9 Soft tissue disorder, unspecified
- M79.A Nontraumatic compartment syndromeNon-billable
- M79.A1 Nontraumatic compartment syndrome of upper extremityNon-billable
- M79.A11 Nontraumatic compartment syndrome of right upper extremity
- M79.A12 Nontraumatic compartment syndrome of left upper extremity
- M79.A19 Nontraumatic compartment syndrome of unspecified upper extremity
- M79.A2 Nontraumatic compartment syndrome of lower extremityNon-billable
- M79.A21 Nontraumatic compartment syndrome of right lower extremity
- 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
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the M79 range.
Fibromyalgia
A common nonarticular rheumatic syndrome characterized by myalgia and multiple points of focal muscle tenderness to palpation (trigger points). Muscle pain is typically aggravated by inactivity or exposure to cold. This condition is often associated with general symptoms, such as sleep disturbances, fatigue, stiffness, HEADACHES, and occasionally DEPRESSION. There is significant overlap between fibromyalgia and the chronic fatigue syndrome (FATIGUE SYNDROME, CHRONIC). Fibromyalgia may arise as a primary or secondary disease process. It is most frequent in females aged 20 to 50 years. (From Adams et al., Principles of Neurology, 6th ed, p1494-95)
Myalgia
Painful sensation in the muscles.
Neuralgia
Intense or aching pain that occurs along the course or distribution of a peripheral or cranial nerve.
Neuritis
A general term indicating inflammation of a peripheral or cranial nerve. Clinical manifestation may include PAIN; PARESTHESIAS; PARESIS; or HYPESTHESIA.
Panniculitis
General term for inflammation of adipose tissue, usually of the skin, characterized by reddened subcutaneous nodules.
Rheumatic Diseases
Disorders of connective tissue, especially the joints and related structures, characterized by inflammation, degeneration, or metabolic derangement.
Soft Tissue Disorder
A non-neoplastic or neoplastic disorder that affects the soft tissue.
About the M79 Code Range
Soft tissue disorders here include muscle pain, pain in the limbs and their smaller parts, and objects left in soft tissue. The category also has entries for other named disorders and disorders that are not specified.
M79.1 separates muscle pain by site, including chewing muscles and other head and neck muscles. M79.6 separates pain by area, such as the arm, hand, thigh, lower leg, foot, fingers, or toes. M79.A separates compartment syndrome not caused by injury by upper limb, lower limb, abdomen, or other site. M79.8 identifies other specified soft tissue disorders, while M79.9 identifies an unspecified soft tissue disorder.
Questions About This Page
How many billable codes are in the M79 range?
Of the 66 codes in this range, 52 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the M79 range classify?
The range classifies other and unspecified soft tissue disorders, not elsewhere classified. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
