2026 ICD-10-CM Diagnosis Code M79Other and unspecified soft tissue disorders, not elsewhere classified

ICD-10-CM Codes›M00–M99›M70-M79›M79

ICD-10-CM M79
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M79 is a non-billable ICD-10-CM category code for other and unspecified soft tissue disorders, not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M79.0, M79.10, M79.11, and M79.12.

Code Identity

ICD-10-CM Code
M79
Billable Status
No — Non-Billable Category
Code Describes
Other and unspecified soft tissue disorders, not elsewhere classified
Short Description
Oth and unsp soft tissue disorders, not elsewhere classified
Chapter
M70-M79
Other soft tissue disorders

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM70-M79Other soft tissue disorders
CategoryM79Other and unspecified soft tissue disorders, not elsewhere classified
This CodeM79Other and unspecified soft tissue disorders, not elsewhere classified

Specific Coding for Oth and unsp soft tissue disorders, not elsewhere classifiedOverview

Non-specific codes like M79 require more characters. Use one of these billable codes instead:

  • Use M79.0 for Rheumatism, unspecified

  • M79.1 for Myalgia

  • Use M79.10 for Myalgia, unspecified site

  • Use M79.11 for Myalgia of mastication muscle

  • Use M79.12 for Myalgia of auxiliary muscles, head and neck

  • Use M79.18 for Myalgia, other site

  • Use M79.2 for Neuralgia and neuritis, unspecified

  • Use M79.3 for Panniculitis, unspecified

  • Use M79.4 for Hypertrophy of (infrapatellar) fat pad

  • Use M79.5 for Residual foreign body in soft tissue

  • M79.6 for Pain in limb, hand, foot, fingers and toes

  • M79.60 for Pain in limb, unspecified

  • M79.62 for Pain in upper arm

  • M79.63 for Pain in forearm

  • M79.64 for Pain in hand and fingers

  • M79.65 for Pain in thigh

  • M79.66 for Pain in lower leg

  • M79.67 for Pain in foot and toes

  • Use M79.7 for Fibromyalgia

  • M79.8 for Other specified soft tissue disorders

  • Use M79.81 for Nontraumatic hematoma of soft tissue

  • Use M79.89 for Other specified soft tissue disorders

  • Use M79.9 for Soft tissue disorder, unspecified

  • M79.A for Nontraumatic compartment syndrome

  • M79.A1 for Nontraumatic compartment syndrome of upper extremity

  • M79.A2 for Nontraumatic compartment syndrome of lower extremity

  • Use M79.A3 for Nontraumatic compartment syndrome of abdomen

  • Use M79.A9 for Nontraumatic compartment syndrome of other sites

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

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

Patient EducationClinical

Connective Tissue Disorders

Your connective tissue supports many different parts of your body, such as your skin, eyes, and heart. It is like a "cellular glue" that gives your body parts their shape and helps keep them strong. It also helps some of your tissues do their work. It is made of many kinds of proteins. Cartilage and fat are types of connective tissue.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M79Overview

Is M79 a billable code?

No. This is a category header that groups the codes for other and unspecified soft tissue disorders, not elsewhere classified, and headers cannot be submitted on claims. Claims for other and unspecified soft tissue disorders, not elsewhere classified need a more specific code from this category, such as M79.0, M79.10, and M79.11.