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

Index trail

Other persistent atrial fibrillation

See Tabular List: I48.19

I48, Atrial fibrillation and flutter

I48.1, Persistent atrial fibrillation

I48.19, Other persistent atrial fibrillation

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

I48.19

Other persistent atrial fibrillation

Open the shareable code page for I48.19→
billableHCC mapped

Includes

official source
  • Chronic persistent atrial fibrillation
  • Persistent atrial fibrillation, NOS

Excludes 1

official source
  • Permanent atrial fibrillation (I48.21)

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

Other persistent atrial fibrillation

See Tabular List: I48.19

I48, Atrial fibrillation and flutter

I48.1, Persistent atrial fibrillation

I48.19, Other persistent atrial fibrillation

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

I48.19

Other persistent atrial fibrillation

Open the shareable code page for I48.19→
billableHCC mapped

Includes

official source
  • Chronic persistent atrial fibrillation
  • Persistent atrial fibrillation, NOS

Excludes 1

official source
  • Permanent atrial fibrillation (I48.21)

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 238 Specified Heart Arrhythmias (V28)HCC 96 Specified Heart Arrhythmias (V24)HCC 193 Specified Heart Arrhythmias (RxHCC)HCC 96 Specified Heart Arrhythmias (ESRD/PACE)HCC 142 HHS-HCC 142; HHS-HCC 2026 benefit year (HHS-HCC)

RAF Value

V28: RAF: 0.299V24: RAF: 0.268RxHCC: RAF: 0.215ESRD/PACE: RAF: 0.049HHS-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 238

Specified Heart Arrhythmias

RAF: 0.299

V24

HCC 96

Specified Heart Arrhythmias

RAF: 0.268

RxHCC

RxHCC 193

Specified Heart Arrhythmias

RAF: 0.215

ESRD/PACE

HCC 96

Specified Heart Arrhythmias

RAF: 0.049

HHS-HCC

HCC 142

HHS-HCC 142; HHS-HCC 2026 benefit year

RAF: Varies by metal level

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
I48.19Billable

Other persistent atrial fibrillation

CMS-HCC V28

HCC 238

RAF 0.299

CMS-HCC V24

HCC 96

RAF 0.268

RxHCC

RxHCC 193

RAF 0.215

Reviewed by the HCC Buddy Coding TeamFY2026 Apr update

Code

I48.19

V28 HCC

HCC 238

RAF

0.299

Compare tray

Add close codes to compare documentation differences.