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FY2027 ICD-10-CM reference

A01.05: Typhoid osteomyelitis

By the HCC Buddy Coding Team

The official ICD-10-CM descriptor is Typhoid osteomyelitis. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.

Billable code. Verified against the official FY2027 order file.

CMS-HCC V28

  • HCC 92: Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis · RAF 0.479, Community Non-Dual Aged (CNA)

Payment year 2027, 2026 dates of service. HCC from the CMS 2027 Initial ICD-10-CM Mappings; RAF from the CMS-HCC V28 relative factors. For 2027 dates of service, CMS has not yet published the payment year 2028 mappings.

CMS-HCC V24

Not used for payment year 2027 Medicare Advantage payment

ESRD

  • HCC 39: Bone/Joint/Muscle Infections/Necrosis

Coefficient pending: payment year 2027 coefficients for this model are not yet verified, so no RAF is shown. Mapping: PY2026 CMS mapping; CMS 2027 initial file unchanged.

PACE

Source verification pending

RxHCC

No category in the PY2026 CMS mapping; CMS 2027 initial file unchanged

HHS-HCC

  • HCC 55: Bone/Joint/Muscle Infections/Necrosis

RAF not applicable: HHS-HCC weights vary by metal level. Mapping: HHS-HCC 2026 benefit year.

FY2027 Tabular instructions

Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.

Includes

diseases generally recognized as communicable or transmissible

Source: A00-B99 (chapter, inherited).

Instructional note

code to identify resistance to antimicrobial drugs (Z16.-)

Source: A00-B99 (chapter, inherited).

Excludes2

carrier or suspected carrier of infectious disease (Z22.-)

Source: A00-B99 (chapter, inherited).

Excludes2

certain localized infections - see body system-related chapters

Source: A00-B99 (chapter, inherited).

Excludes2

infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)

Source: A00-B99 (chapter, inherited).

Excludes2

infectious and parasitic diseases specific to the perinatal period (P35-P39)

Source: A00-B99 (chapter, inherited).

Excludes2

influenza and other acute respiratory infections (J00-J22)

Source: A00-B99 (chapter, inherited).

Instructional note

Infection due to Salmonella typhi

Source: A01.0 (self, inherited).

Source: CMS FY2027 Tabular List and Alphabetic Index.

Open Tabular instructions and code details

Compare the FY2027 additions, removals and billable-status changes

What does A01.05 mean in FY2027?

The official ICD-10-CM descriptor is Typhoid osteomyelitis. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.

Is A01.05 billable in FY2027?

The FY2027 order file marks A01.05 as billable. Check the complete Tabular instructions and documentation before assigning it.

Does A01.05 map to an HCC?

In the CMS 2027 Initial ICD-10-CM Mappings (payment year 2027, 2026 dates of service), A01.05 maps to CMS-HCC V28 HCC 92 (Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis). For 2027 dates of service, CMS has not yet published the payment year 2028 mappings. Under the PY2026 CMS mapping; CMS 2027 initial file unchanged: ESRD HCC 39; no RxHCC category. Coefficients for these models are pending verification for payment year 2027. HHS-HCC: HCC 55 under the HHS-HCC 2026 benefit year mapping (no RAF; HHS-HCC weights vary by metal level). CMS-HCC V24: not used for payment year 2027 Medicare Advantage payment (CMS CY 2027 Rate Announcement). The PACE mapping is still pending verification for FY2027.

Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.

Review the FY2026 April edition