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ICD-10-CM 2027 diagnosis code

B78.1Cutaneous strongyloidiasis

✓ Billable / specific

B78.1 is a valid, billable ICD-10-CM code for cutaneous strongyloidiasis. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 B78.1

B78.1 is the ICD-10-CM diagnosis code for cutaneous strongyloidiasis. It belongs to category B78 (strongyloidiasis), block B65-B83 (helminthiases) 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.

Within B78 (strongyloidiasis), B78.1 is specifically for cutaneous strongyloidiasis. Related codes cover intestinal strongyloidiasis (B78.0), disseminated strongyloidiasis (B78.7) and unspecified (B78.9).

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 686.8 (other specified local infections of skin and subcutaneous tissue).

Notes that apply from higher levels

Instructions written at a parent level also apply to B78.1.

› From B78 Strongyloidiasis
Excludes1
  • trichostrongyliasis (B81.2)

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

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to B78.1.

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 →
  • 686.8Other specified local infections of skin and subcutaneous tissueapproximate

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 B78.1

Is B78.1 billable?

Yes. B78.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can B78.1 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict B78.1 as a principal diagnosis.

Is B78.1 a CC or MCC?

No. B78.1 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does B78.1 group to?

B78.1 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 B78.1?

The CMS General Equivalence Mappings map B78.1 to ICD-9-CM 686.8.