ICD-10-CM Diagnosis Code M79.1 - Myalgia (original) (raw)

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ICD List 2025-2026 Edition

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Myalgia

ICD-10-CM Code:

M79.1

ICD-10 Code for:

Myalgia

Is Billable?

Not Valid for Submission

Chronic Condition Indicator: [1]

Not chronic

Code Navigator:

M79.1 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of myalgia. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Non-specific codes like M79.1 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding 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

  1. Code Information
  2. Specific Coding
  3. Clinical Classification
  4. Clinical Information
  5. Tabular List of Diseases and Injuries
  6. Convert to ICD-9 Code
  7. Patient Education
  8. Other Codes Used Similar Conditions
  9. Code History

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

CCSR Code: MUS010

Inpatient Default: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

painful sensation in the muscles.

damage to the muscle or its function secondary to toxic substances such as drugs used in chemotherapy; immunotherapy; or radiation.

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.

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

ICD-9-CM: 729.1

Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option, but it may not fully capture the original diagnosis or clinical intent.

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:

Sometimes the cause of muscle disorders is unknown.

[Learn More in MedlinePlus]