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HCC Buddy Code Book

Digital Tabbed Code Book
FY2026 Apr update selectedlive API fallback active

DOS 2026-04-01: For dates of service from Apr 1, 2026 through Sep 30, 2026, HCC Buddy uses the FY2026 April ICD-10-CM update where source-labeled.

Reviewed by Jess P., CPCFY2026 Apr update

Code

K59.09

V28 HCC

source required

RAF

source required

HCC Buddy
HCC Buddy
ICD-10-CM · Online Code Book
Alphabetic Index and Tabular path
source requiredSource load source requiredSource year source requiredUpdated source required

Index trail

K59.09 description source required for selected-code loading state.

See Tabular List: K59.09

Chapter source required for selected-code loading state.

Section source required for selected-code loading state.

Parent code source required for selected-code loading state.

K59.09, K59.09 description source required for selected-code loading state.

Selected code, source checked for the selected effective period

Commonly confused codes

source required
  • Source required for related-code comparison.
Code details and official notes

K59.09

K59.09 description source required for selected-code loading state.

Open the shareable code page for K59.09→
nonbillable

Includes

source required
  • Source required for fallback official note.

Excludes 1

official source

No Excludes 1 note is listed in this source payload.

Excludes 2

source required
  • Source required for fallback official note.

Code First

official source

Not listed for this effective period.

Use Additional

official source

Not listed for this effective period.

Code Also

official source

Not listed for this effective period.

7th character

official source
  • Not listed for this code in the selected Tabular payload.

Placeholder X

official source
  • Not listed for this code in the selected Tabular payload.

Laterality

official source
  • No laterality instruction is listed for this code in the selected Tabular payload.

Effective period

source required
  • Effective period source required for selected-code loading state.
HCC Buddy
HCC Buddy
ICD-10-CM · Online Code Book
Alphabetic Index and Tabular path
Code details and official notes
HCC Buddy Insights

HCC Mapping

V28 source requiredV24 source requiredRxHCC source requiredESRD/PACE source requiredHHS-HCC source required for selected effective period (HHS-HCC)

RAF Value

V28 RAF source requiredV24 RAF source requiredRxHCC RAF source requiredESRD/PACE RAF source requiredHHS-HCC RAF source required

Model Period

FY2026 Apr update

Source

source required

Audit Caution

Close codes need documentation support before selection. Do not assume relationships.
Reviewed by Jess P., CPC

HCC Buddy workflow band

HCC mapping, RAF, MEAT, source trail, and audit caution stay in view.

MEAT supportaudit cautionsource required

HHS-HCC

source required

HHS-HCC source required for selected effective period

RAF: source required

MEAT checklist

Reviewed by Jess P., CPC

Monitor, Evaluate, Assess, or Treat must be supported in the provider note.

HCC Buddy guidance, not official ICD-10-CM text.

Audit caution

Reviewed by Jess P., CPC

Close codes need documentation support before selection. Do not assume relationships.

HCC Buddy guidance, not official ICD-10-CM text.

Reviewer sign-off

Reviewed by Jess P., CPC

MEAT, 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.

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