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ICD-10-CM 2027 diagnosis code

B81.2Trichostrongyliasis

✓ Billable / specificCC — complication/comorbidity

B81.2 is a valid, billable ICD-10-CM code for trichostrongyliasis. 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 Trichostrongyliasis.

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 B81.2

B81.2 is the ICD-10-CM diagnosis code for Trichostrongyliasis. It belongs to category B81 (other intestinal helminthiases, not elsewhere classified), 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 B81 (other intestinal helminthiases, not elsewhere classified), B81.2 is specifically for Trichostrongyliasis. Related codes cover Anisakiasis (B81.0), intestinal capillariasis (B81.1), intestinal angiostrongyliasis (B81.3), mixed intestinal helminthiases (B81.4) and other specified intestinal helminthiases (B81.8).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive System), 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 127.6 (Trichostrongyliasis).

Notes that apply from higher levels

Instructions written at a parent level also apply to B81.2.

› From B81 Other intestinal helminthiases, not elsewhere classified
Excludes1
  • angiostrongyliasis due to:
  • Angiostrongylus cantonensis (B83.2)
  • Parastrongylus cantonensis (B83.2)

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

Alphabetic index entries

6 entries

Terms in the official ICD-10-CM index that lead to B81.2.

Codes whose notes reference B81.2

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.

ICD-9-CM equivalent

Converter →
  • 127.6Trichostrongyliasisexact

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 B81.2

Is B81.2 billable?

Yes. B81.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can B81.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict B81.2 as a principal diagnosis.

Is B81.2 a CC or MCC?

B81.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does B81.2 group to?

B81.2 is used in the MS-DRG v44.0 logic for MS-DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC) and MS-DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders 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 B81.2?

The CMS General Equivalence Mappings map B81.2 to ICD-9-CM 127.6.