ICD-10-CM Code M79.1

Myalgia

Version 2020 Replaced Code Non-Billable Code

Not Valid for Submission

M79.1 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of myalgia. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M79.1
Short Description:Myalgia
Long Description:Myalgia

Consider the following ICD-10 codes with a higher level of specificity:

  • 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

Replaced Code

This code was replaced in the 2020 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2019. This code was replaced for the FY 2020 (October 1, 2019 - September 30, 2020).

  • 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

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code M79.1:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Myofascial pain syndrome

Type 1 Excludes

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.

Clinical Information

  • PLEURODYNIA EPIDEMIC-. an acute febrile infectious disease generally occurring in epidemics. it is usually caused by coxsackieviruses b and sometimes by coxsackieviruses a; echoviruses; or other enteroviruses.
  • MYALGIA-. painful sensation in the muscles.

Convert M79.1 to ICD-9

  • 729.1 - Myalgia and myositis NOS (Approximate Flag)

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 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - Code Deleted, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

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.


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