Other disorders of nervous system in diseases classified elsewhere
In Other disorders of the nervous system (G89-G99), chapter 6: Diseases of the Nervous System
3 billable codes under G99: 2 are a CC; 1 map to HCC 182 (Spinal Cord Disorders/Injuries).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.
Advertisements
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 G99
G99 can't be used on a claim. Pick a billable code below; grey headings group them.
G99 MS-DRGs
As the principal diagnosis, the billable codes under G99 group to these 8 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 070 Other Cerebrovascular Disorders with MCC (1 of 3 codes)
- DRG 071 Other Cerebrovascular Disorders with CC (1 of 3 codes)
- DRG 072 Other Cerebrovascular Disorders without CC/MCC (1 of 3 codes)
- DRG 073 Cranial and Peripheral Nerve Disorders with MCC (1 of 3 codes)
- DRG 074 Cranial and Peripheral Nerve Disorders without MCC (1 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 G99
Notes on these codes point to G99.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Neurologic Diseases
The brain, spinal cord, and nerves make up the nervous system. Together they control all the workings of the body. When something goes wrong with a part of your nervous system, you can have trouble moving, speaking, swallowing, breathing, or learning. You can also have problems with your memory, senses, or mood.
Read more about neurologic diseases on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.