Skip to content
HCC Buddy home

HCC Buddy Code Book

Skip to code book content
HCC Buddy
HCC Buddy
Alphabetic Index and Tabular path
HCC Buddy public API, FY2026 Apr updateSource load source requiredSource year 2026Updated 2026-04-01

Index trail

Heart-lung transplant rejection

See Tabular List: T86.31

T86, Complications of transplanted organs and tissue

T86.3, Complications of heart-lung transplant

T86.31, Heart-lung transplant rejection

Selected code, source checked for the selected effective period

Commonly confused codes

official source

Not listed for this effective period.

Code details and official notes

T86.31

Heart-lung transplant rejection

Open the shareable code page for T86.31→
billableHCC mapped

Includes

official source

Not listed for this effective period.

Excludes 1

official source

No Excludes 1 note is listed in this source payload.

Excludes 2

official source

No Excludes 2 note is listed in this source payload.

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
  • FY2026 Apr update
  • Source year 2026
  • Updated 2026-04-01
  • HCC Buddy public API
HCC Buddy
HCC Buddy
Alphabetic Index and Tabular path
HCC Buddy public API, FY2026 Apr updateSource load source requiredSource year 2026Updated 2026-04-01

Index trail

Heart-lung transplant rejection

See Tabular List: T86.31

T86, Complications of transplanted organs and tissue

T86.3, Complications of heart-lung transplant

T86.31, Heart-lung transplant rejection

Selected code, source checked for the selected effective period

Commonly confused codes

official source

Not listed for this effective period.

Code details and official notes

T86.31

Heart-lung transplant rejection

Open the shareable code page for T86.31→
billableHCC mapped

Includes

official source

Not listed for this effective period.

Excludes 1

official source

No Excludes 1 note is listed in this source payload.

Excludes 2

official source

No Excludes 2 note is listed in this source payload.

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
  • FY2026 Apr update
  • Source year 2026
  • Updated 2026-04-01
  • HCC Buddy public API
HCC Buddy Insights

HCC Mapping

HCC 221 Heart Transplant Status/Complications (V28)HCC 186 Major Organ Transplant or Replacement Status (V24)HCC 396 Allograft Complications (RxHCC)HCC 186 Major Organ Transplant or Replacement Status (ESRD/PACE)HCC 129, 158 HHS-HCC 129, 158; HHS-HCC 2026 benefit year (HHS-HCC)

RAF Value

V28: RAF: 1.053V24: RAF: 0.832RxHCC: RAF: Not separately weightedESRD/PACE: RAF: 0.138HHS-HCC: RAF: context required

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 221

Heart Transplant Status/Complications

RAF: 1.053

V24

HCC 186

Major Organ Transplant or Replacement Status

RAF: 0.832

RxHCC

RxHCC 396

Allograft Complications

RAF: Not separately weighted

ESRD/PACE

HCC 186

Major Organ Transplant or Replacement Status

RAF: 0.138

HHS-HCC

HCC 129, 158

HHS-HCC 129, 158; HHS-HCC 2026 benefit year

RAF: context required

MEAT checklist

Reviewed by the HCC Buddy Coding Team

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 the HCC Buddy Coding Team

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 the HCC Buddy Coding Team

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.
HCC Buddy Code Card
FY 2026 Apr update
T86.31Billable

Heart-lung transplant rejection

CMS-HCC V28

HCC 221

RAF 1.053

CMS-HCC V24

HCC 186

RAF 0.832

RxHCC

RxHCC 396

RAF Not separately weighted

Reviewed by the HCC Buddy Coding TeamFY2026 Apr update

Code

T86.31

V28 HCC

HCC 221

RAF

1.053

Compare tray

Add close codes to compare documentation differences.