G00-G09 — Inflammatory diseases of the central nervous system
ICD-10-CM codes G00-G09 cover inflammatory diseases of the central nervous system, within diseases of the nervous system. The block holds 44 codes across 10 categories, of which 35 are billable and 9 are header codes that cannot be submitted on a claim.
Risk adjustment in G00-G09
0 codes in this block map to a CMS-HCC, which means the diagnosis carries a risk-adjustment payment when it is documented and coded. Under-coding here is money left on the table; over-coding here is what audits are for.
- HCC 182 Spinal Cord Disorders/Injuries
What else to watch in G00-G09
- 35 codes are named in Medicare coverage policies. An LCD or NCD lists them as supporting medical necessity, or explicitly as not supporting it. Which applies depends on the MAC for your state.
Categories in G00-G09
- G00Bacterial meningitis, not elsewhere classified
- G01Meningitis in bacterial diseases classified elsewhere
- G02Meningitis in other infectious and parasitic diseases classified elsewhere
- G03Meningitis due to other and unspecified causes
- G04Encephalitis, myelitis and encephalomyelitis
- G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
- G06Intracranial and intraspinal abscess and granuloma
- G07Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere
- G08Intracranial and intraspinal phlebitis and thrombophlebitis
- G09Sequelae of inflammatory diseases of central nervous system