HCC Buddy Code Card
FY 2026 Apr updateT40.904ABillable
Poisoning by unspecified psychodysleptics [hallucinogens], undetermined, initial encounter
CMS-HCC V28
HCC 137
RAF 0.424
CMS-HCC V24
HCC 55
RAF 0.329
ESRD/PACE
HCC 55
RAF 0.111
HCC Buddy Code Book
Skip to code book content
HCC Buddy
Alphabetic Index and Tabular path
HCC Buddy public API, FY2026 Apr updateSource load source requiredSource year 2026Updated 2026-04-01
Index trail
Poisoning by unspecified psychodysleptics [hallucinogens]
See Tabular List: T40.904A
T40, Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
T40.9, Poisoning by, adverse effect of and underdosing of other and unspecified psychodysleptics [hallucinogens]
T40.90, Poisoning by, adverse effect of and underdosing of unspecified psychodysleptics [hallucinogens]
T40.904, Poisoning by unspecified psychodysleptics [hallucinogens], undetermined
T40.904A, Poisoning by unspecified psychodysleptics [hallucinogens], undetermined, initial encounter
Selected code, source checked for the selected effective period
Commonly confused codes
official sourceNot listed for this effective period.
Code details and official notes
T40.904A
Poisoning by unspecified psychodysleptics [hallucinogens], undetermined, initial encounter
Open the shareable code page for T40.904A→billableHCC mapped
Includes
official sourceNot listed for this effective period.
Excludes 1
official sourceNo Excludes 1 note is listed in this source payload.
Excludes 2
official sourceNo Excludes 2 note is listed in this source payload.
Code First
official sourceNot listed for this effective period.
Use Additional
official sourceNot listed for this effective period.
Code Also
official sourceNot listed for this effective period.
7th character
official sourceNot listed for this code in the selected Tabular payload.
Placeholder X
official sourceNot listed for this code in the selected Tabular payload.
Laterality
official sourceNo laterality instruction is listed for this code in the selected Tabular payload.
Effective period
source required- FY2026 Apr update
- Source year 2026
- Updated 2026-04-01
- HCC Buddy public API
HCC Buddy
Alphabetic Index and Tabular path
HCC Buddy public API, FY2026 Apr updateSource load source requiredSource year 2026Updated 2026-04-01
Index trail
Poisoning by unspecified psychodysleptics [hallucinogens]
See Tabular List: T40.904A
T40, Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
T40.9, Poisoning by, adverse effect of and underdosing of other and unspecified psychodysleptics [hallucinogens]
T40.90, Poisoning by, adverse effect of and underdosing of unspecified psychodysleptics [hallucinogens]
T40.904, Poisoning by unspecified psychodysleptics [hallucinogens], undetermined
T40.904A, Poisoning by unspecified psychodysleptics [hallucinogens], undetermined, initial encounter
Selected code, source checked for the selected effective period
Commonly confused codes
official sourceNot listed for this effective period.
Code details and official notes
T40.904A
Poisoning by unspecified psychodysleptics [hallucinogens], undetermined, initial encounter
Open the shareable code page for T40.904A→billableHCC mapped
Includes
official sourceNot listed for this effective period.
Excludes 1
official sourceNo Excludes 1 note is listed in this source payload.
Excludes 2
official sourceNo Excludes 2 note is listed in this source payload.
Code First
official sourceNot listed for this effective period.
Use Additional
official sourceNot listed for this effective period.
Code Also
official sourceNot listed for this effective period.
7th character
official sourceNot listed for this code in the selected Tabular payload.
Placeholder X
official sourceNot listed for this code in the selected Tabular payload.
Laterality
official sourceNo laterality instruction is listed for this code in the selected Tabular payload.
Effective period
source required- FY2026 Apr update
- Source year 2026
- Updated 2026-04-01
- HCC Buddy public API
HCC Buddy Insights
HCC Mapping
HCC 137 Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications (V28)HCC 55 Substance Use Disorder, Moderate/Severe, or Substance Use with Complications (V24)RxHCC source requiredHCC 55 Substance Use Disorder, Moderate/Severe, or Substance Use with Complications (ESRD/PACE)HCC 82 HHS-HCC 82; HHS-HCC 2026 benefit year (HHS-HCC)
RAF Value
V28: RAF: 0.424V24: RAF: 0.329RxHCC RAF source requiredESRD/PACE: RAF: 0.111HHS-HCC: RAF: Varies by metal level
Model Period
FY2026 Apr update
Source
source required
Audit Caution
Close codes need documentation support before selection. Do not assume relationships.
Reviewed by the HCC Buddy Coding Team
HCC Buddy workflow band
HCC mapping, RAF, MEAT, source trail, and audit caution stay in view.
MEAT supportaudit cautionsource required
V28
HCC 137
Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications
RAF: 0.424
V24
HCC 55
Substance Use Disorder, Moderate/Severe, or Substance Use with Complications
RAF: 0.329
ESRD/PACE
HCC 55
Substance Use Disorder, Moderate/Severe, or Substance Use with Complications
RAF: 0.111
HHS-HCC
HCC 82
HHS-HCC 82; HHS-HCC 2026 benefit year
RAF: Varies by metal level
MEAT checklist
Reviewed by the HCC Buddy Coding TeamMonitor, Evaluate, Assess, or Treat must be supported in the provider note.
HCC Buddy guidance, not official ICD-10-CM text.
Audit caution
Reviewed by the HCC Buddy Coding TeamClose codes need documentation support before selection. Do not assume relationships.
HCC Buddy guidance, not official ICD-10-CM text.
Reviewer sign-off
Reviewed by the HCC Buddy Coding TeamMEAT, documentation support, audit cautions, and close-code guidance are reviewed and approved for this effective period.
HCC Buddy enrichment is separate from official source text.
Last updated: April 1, 2026 · Not a substitute for official coding guidelines. No PHI or patient data.
Reviewed by the HCC Buddy Coding TeamFY2026 Apr update
Code
T40.904A
V28 HCC
HCC 137
RAF
0.424
Compare tray
Add close codes to compare documentation differences.