Disorders of myoneural junction and muscle in diseases classified elsewhere
In Diseases of myoneural junction and muscle (G70-G73), chapter 6: Diseases of the Nervous System
3 billable codes under G73: 2 are a CC; 2 map to HCC 196 (Myasthenia Gravis without (Acute) Exacerbation and Other Myoneural Disorders).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers default dominant or nondominant side for hemiplegia and monoplegia, and use and sequencing of G89 pain codes, including postoperative, chronic, and neoplasm-related pain.
- Dominant/nondominant side (page 45)
- Pain - Category G89 (page 45)
All codes under G73
G73 can't be used on a claim. Pick a billable code below; grey headings group them.
G73 MS-DRGs
As the principal diagnosis, the billable codes under G73 group to MS-DRG 056, 057, 091, 092, or 093 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 056 Degenerative Nervous System Disorders with MCC (2 of 3 codes)
- DRG 057 Degenerative Nervous System Disorders without MCC (2 of 3 codes)
- DRG 091 Other Disorders of Nervous System with MCC (1 of 3 codes)
- DRG 092 Other Disorders of Nervous System with CC (1 of 3 codes)
- DRG 093 Other Disorders of Nervous System without CC/MCC (1 of 3 codes)
Other codes that refer to G73
Notes on these codes point to G73.
- M62.84 Code First: disorders of myoneural junction and muscle disease in diseases classified elsewhere (G73.-)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Neuromuscular Disorders
Neuromuscular disorders affect your neuromuscular system. They can cause problems with: These disorders can cause your muscles to become weak and waste away. You may also have symptoms such as spasms, twitching, and pain.
Read more about neuromuscular disorders on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.