ICD-10 B79
Billable / Specific CCTrichuriasis
About ICD-10-CM B79
ICD-10-CM code B79 represents Trichuriasis. This is a billable/specific code in the Infectious and Parasitic Diseases chapter (block B79). The 2026 edition of ICD-10-CM B79 became effective on October 1, 2025.
Coding Tips for B79
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
B79 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Includes
- trichocephaliasis
- whipworm (disease)(infection)
Inpatient DRG Impact, CC
codes Trichuriasis. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for B79
Local Coverage Determinations (LCDs) from CMS MACs that list B79 as a covered diagnosis.
Showing top 10 of 98 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing B79.
2 Medicare
CPT Codes Commonly Billed with B79
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 45307 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45309 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45308 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45303 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45321 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45347 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45320 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 0885T CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45327 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45317 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
Convert B79 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| B79 | 1273 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To B79
Other codes in section B65-B83 (Helminthiases).
ICD-10 B79, Billing FAQ
Is ICD-10 code B79 billable? +
Yes, B79 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Is B79 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What CPT codes are commonly billed with B79? +
Procedures frequently paired with B79 include: 45307, 45309, 45308, 45303, 45321.
What ICD-9 codes does B79 map to? +
Per CMS GEMs, B79 maps to ICD-9 codes: 1273. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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