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ICD-10-CM 2027 diagnosis code

A46Erysipelas

✓ Billable / specific

A46 is a valid, billable ICD-10-CM code for erysipelas. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Erysipelas.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About A46

A46 is the ICD-10-CM diagnosis code for Erysipelas. It belongs to block A30-A49 (other bacterial diseases) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Don't report A46 together with the conditions in its Excludes1 note: postpartum or puerperal erysipelas (O86.89).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 602 (Cellulitis with MCC, relative weight 1.4273) and DRG 603 (Cellulitis without MCC, relative weight 0.8635), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 035 (Erysipelas).

Coding notes

Excludes1Not coded here — never report together with this code
  • postpartum or puerperal erysipelas (O86.89)

Notes that apply from higher levels

Instructions written at a parent level also apply to A46.

Broader instructions also apply from Chapter 1: Certain infectious and parasitic diseases.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to A46.

Codes whose notes reference A46

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 09 · Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast

ICD-9-CM equivalent

Converter →
  • 035Erysipelasexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about A46

Is A46 billable?

Yes. A46 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can A46 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict A46 as a principal diagnosis.

Is A46 a CC or MCC?

No. A46 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does A46 group to?

A46 is used in the MS-DRG v44.0 logic for MS-DRG 602 (Cellulitis with MCC) and MS-DRG 603 (Cellulitis without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for A46?

The CMS General Equivalence Mappings map A46 to ICD-9-CM 035.