2026 ICD-10-CM Diagnosis Code G73.7Myopathy in diseases classified elsewhere
ICD-10-CM Codes›G00–G99›G70-G73›G73
- Billable — Valid for Submission
- Not Chronic
G73.7 is a billable ICD-10-CM diagnosis code for myopathy in diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Myopathies.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for G73.7.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Amyloid myopathy
- Autoimmune inflammation of skeletal muscle
- Autoimmune necrotizing myopathy
- Carcinomatous myopathic syndrome
- Chronic myopathy with hypocalcemia and hypophosphatemia
- Endocrine myopathy
- Glycogen storage disease, muscular form
- Human immunodeficiency virus myopathy
- Hypothyroid myopathy
- Idiopathic inflammatory myopathy
- Lipid storage myopathy
- Luft's hypermetabolic myopathy
- Metabolic myopathy
- Metabolic myopathy due to lactate transporter defect
- Mitochondrial-lipid-glycogen storage myopathy
- Myopathy co-occurrent and due to hypercalcemia
- Myopathy due to calcium deficiency
- Myopathy due to Cushing's syndrome
- Myopathy due to magnesium deficiency
- Myopathy due to paraneoplastic syndrome
- Myopathy due to polyarteritis nodosa
- Myopathy in acromegaly
- Myopathy in Addison's disease
- Myopathy in Cushing's disease
- Myopathy in hyperparathyroidism
- Myopathy in hypoparathyroidism
- Myopathy in hypopituitarism
- Myopathy in myasthenia gravis
- Myopathy in osteomalacia
- Neutral lipid storage disease with myopathy
- Nutritional myopathy
- Polyglucosan body myopathy type 1
- Polyglucosan body myopathy type 2
- Potassium depletion myopathy
- Primary familial amyloid myopathy
- Primary sporadic amyloid myopathy
- Protein deficiency myopathy
- Secondary myopathy
- Thyrotoxic myopathy
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
- underlying disease, such as:
- glycogen storage disease E74.0
- hyperparathyroidism E21.0 E21.3
- hypoparathyroidism E20
- lipid storage disorders E75
Type 1 Excludes
- myopathy in:
- rheumatoid arthritis M05.32
- sarcoidosis D86.87
- scleroderma M34.82
- Sjögren syndrome M35.03
- systemic lupus erythematosus M32.19
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
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 ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Metabolic Myopathy
a group of rare inherited disorders characterized by a deficiency of enzymes that are involved in metabolic pathways that affect muscles. the disorders are characterized by muscle dysfunction.
Patient EducationClinical
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.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G73.7 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G73.7Overview
Is G73.7 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report myopathy in diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can G73.7 be a principal diagnosis?
No. This is a manifestation code: myopathy in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
What is the ICD-9 equivalent of G73.7?
Under the General Equivalence Mappings, myopathy in diseases classified elsewhere converts to ICD-9-CM 359.5 (myopathy in endocrin dis). The mapping is approximate, so confirm the match fits the documentation.
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.
