Systemic atrophies primarily affecting central nervous system in diseases classified elsewhere
In Systemic atrophies primarily affecting the central nervous system (G10-G14), chapter 6: Diseases of the Nervous System
4 billable codes under G13: none are a CC or MCC; none map to an HCC.
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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 G13
G13 can't be used on a claim. Pick a billable code below; grey headings group them.
- G13.0Paraneoplastic neuromyopathy and neuropathy
- G13.1Other systemic atrophy primarily affecting central nervous system in neoplastic disease
- G13.2Systemic atrophy primarily affecting the central nervous system in myxedema
- G13.8Systemic atrophy primarily affecting central nervous system in other diseases classified elsewhere
G13 MS-DRGs
As the principal diagnosis, the billable codes under G13 group to MS-DRG 056, 057, 073, or 074 (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 4 codes)
- DRG 057 Degenerative Nervous System Disorders without MCC (2 of 4 codes)
- DRG 073 Cranial and Peripheral Nerve Disorders with MCC (2 of 4 codes)
- DRG 074 Cranial and Peripheral Nerve Disorders without MCC (2 of 4 codes)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Brain Diseases
Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body. Your nerves take in information from your senses and send it to the brain to be processed. Your brain and nerves also communicate to help you move and to control your body's functions.
Read more about brain diseases on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.