ICD-10 Code M79.18

Myalgia, other site

Version 2019 Billable Code

Valid for Submission

M79.18 is a billable code used to specify a medical diagnosis of myalgia, other site. The code is valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10: M79.18
Short Description:Myalgia, other site
Long Description:Myalgia, other site

Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Other soft tissue disorders (M70-M79)
      • Oth and unsp soft tissue disorders, not elsewhere classified (M79)

Code History

  • FY 2019 - Code Added, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Medical Professionals

Diagnostic Related Groups

The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code M79.18 is grouped in the following groups for version MS-DRG V37.0 applicable from 10/01/2020 through 09/30/2020.

  • 555 - SIGNS AND SYMPTOMS OF MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITH MCC
  • 556 - SIGNS AND SYMPTOMS OF MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITHOUT MCC

Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Abdominal muscle pain
  • Centrally mediated myalgia
  • Finding of sensation of lumbar spine
  • Myalgia of pelvic floor
  • Myalgia/myositis - forearm
  • Myalgia/myositis - hand
  • Myalgia/myositis - lower leg
  • Myalgia/myositis - shoulder
  • Myalgia/myositis - upper arm
  • Myalgia/myositis -pelvis/thigh
  • Myofascial pain
  • Myofascial pain syndrome
  • Myofascial pain syndrome of lumbar spine
  • Myofascial pain syndrome of thoracic spine
  • Non-articular rheumatism
  • Pain in buttock
  • Pain in forearm

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code M79.18 are found in the index:


Replacement Code

M7918 replaces the following previously assigned ICD-10 code(s):

  • M79.1 - Myalgia

Information for Patients


Muscle Disorders

Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis.

Causes of muscle disorders include

  • Injury or overuse, such as sprains or strains, cramps or tendinitis
  • A genetic disorder, such as muscular dystrophy
  • Some cancers
  • Inflammation, such as myositis
  • Diseases of nerves that affect muscles
  • Infections
  • Certain medicines

Sometimes the cause is not known.


[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.