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  6. 2025 ICD-10-CM Code G71.8

2025 ICD-10-CM Diagnosis Code G71.8

Other primary disorders of muscles

ICD-10-CM Code:
G71.8
ICD-10 Code for:
Other primary disorders of muscles
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

G71.8 is a billable diagnosis code used to specify a medical diagnosis of other primary disorders of muscles. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2024 through September 30, 2025.

Code Classification

  • Diseases of the nervous system
    G00–G99
    • Diseases of myoneural junction and muscle
      G70-G73
      • Primary disorders of muscles
        G71

Approximate Synonyms

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

  • Alpha-B crystallin-related late-onset myopathy
  • Amyotrophy caused by herpes zoster
  • Atrophy of tongue
  • Autosomal dominant distal axonal motor neuropathy, myofibrillar myopathy syndrome
  • Autosomal dominant distal hereditary motor neuropathy
  • Benign monomelic amyotrophy
  • Benign monomelic amyotrophy of lower limb
  • Benign monomelic amyotrophy of upper limb
  • Childhood-onset autosomal recessive myopathy with external ophthalmoplegia
  • Chronic intestinal pseudo-obstruction
  • Fatal infantile hypertonic myofibrillar myopathy
  • Hereditary hollow viscus myopathy
  • Hereditary inclusion body myopathy type 4
  • Hereditary myopathy limited to females
  • Hollow visceral myopathy
  • Kyphosis, lateral tongue atrophy, myofibrillar myopathy syndrome
  • Myopathy due to calsequestrin and SERCA1 protein overload
  • Myopathy with cytoplasmic inclusions
  • Proximal myopathy
  • Proximal myopathy with extrapyramidal signs
  • X-linked limb girdle muscular dystrophy with normal dystrophin
  • X-linked muscular dystrophy with limb girdle distribution
  • X-linked myopathy with postural muscle atrophy

Clinical Classification

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.

Myopathies

CCSR Code: NVS018

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.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert G71.8 to ICD-9-CM

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.

Myopathies NEC

ICD-9-CM: 359.89

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.

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Patient Education


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 of muscle disorders is unknown.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.