ICD-10 · PDGM grouping
G93 Other disorders of brain
All 20 codes in the G93 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
20
Can lead a claim
18
Cannot lead a claim
2
What CMS assigns to G93
18 of the 20 codes group to Neuro Rehabilitation; 2 are assigned no clinical group. Comorbidity subgroups: 5 toward Alzheimer’s disease and related dementias; 1 toward Epilepsy; 14 are assigned none. 18 of the 20 can lead a claim. CMS attaches a code-first note to 1 of the 20.
- Alzheimer’s disease and related dementias: counts toward the high comorbidity tier only in an interaction pair.
- Epilepsy: counts toward the high comorbidity tier only in an interaction pair.
Code first
CMS grouper convention 44, on G93.7. Code first:
- poisoning due to salicylates, if applicable (T39.0-, with sixth character 1-4)
Every code in G93
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| G93.0 | Cerebral cysts | Can lead a claim | B | None |
| G93.1 | Anoxic brain damage, not elsewhere classified | Can lead a claim | B | None |
| G93.2 | Benign intracranial hypertension | Can lead a claim | B | None |
| G93.3 Postviral and related fatigue syndromes | ||||
| G93.31 | Postviral fatigue syndrome | Can lead a claim | B | None |
| G93.32 | Myalgic encephalomyelitis/chronic fatigue syndrome | Can lead a claim | B | None |
| G93.39 | Other post infection and related fatigue syndromes | Can lead a claim | B | None |
| G93.4 Other and unspecified encephalopathy | ||||
| G93.40 | Encephalopathy, unspecified | Can lead a claim | B | None |
| G93.41 | Metabolic encephalopathy | Can lead a claim | B | None |
| G93.42 | Megalencephalic leukoencephalopathy with subcortical cysts | Can lead a claim | B | Alzheimer’s disease and related dementias |
| G93.43 | Leukoencephalopathy with calcifications and cysts | Can lead a claim | B | Alzheimer’s disease and related dementias |
| G93.44 | Adult-onset leukodystrophy with axonal spheroids | Can lead a claim | B | Alzheimer’s disease and related dementias |
| G93.45 | Developmental and epileptic encephalopathy | Can lead a claim | B | Epilepsy |
| G93.49 | Other encephalopathy | Can lead a claim | B | Alzheimer’s disease and related dementias |
| G93.5 | Compression of brain | Can lead a claim | B | None |
| G93.6 | Cerebral edema | Can lead a claim | B | None |
| G93.7 | Reye's syndrome | Can lead a claim, code first applies | B | None |
| G93.8 Other specified disorders of brain | ||||
| G93.81 | Temporal sclerosis | Can lead a claim | B | None |
| G93.82 | Brain death | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| G93.89 | Other specified disorders of brain | Can lead a claim | B | Alzheimer’s disease and related dementias |
| G93.9 | Disorder of brain, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
The monthly home health regs digest
What CMS changed, what's due next, and what to do about it — one email a month, no fluff. Read the first issue