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

Systemic sclerosis

See Tabular List: M34.9

M34, Systemic sclerosis [scleroderma]

M34.9, Systemic sclerosis, unspecified

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

M34.9

Systemic sclerosis, unspecified

Open the shareable code page for M34.9→
billableHCC mapped

Includes

official source

Not listed for this effective period.

Excludes 1

official source
  • circumscribed scleroderma (L94.0)
  • neonatal scleroderma (P83.88)

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

Systemic sclerosis

See Tabular List: M34.9

M34, Systemic sclerosis [scleroderma]

M34.9, Systemic sclerosis, unspecified

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

M34.9

Systemic sclerosis, unspecified

Open the shareable code page for M34.9→
billableHCC mapped

Includes

official source

Not listed for this effective period.

Excludes 1

official source
  • circumscribed scleroderma (L94.0)
  • neonatal scleroderma (P83.88)

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 93 Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders (V28)HCC 40 Rheumatoid Arthritis and Inflammatory Connective Tissue Disease (V24)HCC 82 Systemic Sclerosis (Scleroderma) (RxHCC)HCC 40 Rheumatoid Arthritis and Inflammatory Connective Tissue Disease (ESRD/PACE)HCC 56 HHS-HCC 56; HHS-HCC 2026 benefit year (HHS-HCC)

RAF Value

V28: RAF: 0.617V24: RAF: 0.421RxHCC: RAF: 0.975ESRD/PACE: RAF: 0.058HHS-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 93

Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders

RAF: 0.617

V24

HCC 40

Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

RAF: 0.421

RxHCC

RxHCC 82

Systemic Sclerosis (Scleroderma)

RAF: 0.975

ESRD/PACE

HCC 40

Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

RAF: 0.058

HHS-HCC

HCC 56

HHS-HCC 56; 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
M34.9Billable

Systemic sclerosis, unspecified

CMS-HCC V28

HCC 93

RAF 0.617

CMS-HCC V24

HCC 40

RAF 0.421

RxHCC

RxHCC 82

RAF 0.975

Reviewed by the HCC Buddy Coding TeamFY2026 Apr update

Code

M34.9

V28 HCC

HCC 93

RAF

0.617

Compare tray

Add close codes to compare documentation differences.