B43Header code — not billable

Chromomycosis and pheomycotic abscess

Chapter
1. Certain infectious and parasitic diseases
Category
B43
Effective date
October 1, 2026

Related codes in category B43

B43.0Cutaneous chromomycosisYesB43.1Pheomycotic brain abscessYesB43.2Subcutaneous pheomycotic abscess and cystYesB43.8Other forms of chromomycosisYesB43.9Chromomycosis, unspecifiedYes

Frequently asked questions

What is ICD-10 code B43?

B43 is an ICD-10-CM diagnosis code for Chromomycosis and pheomycotic abscess.

Is B43 a billable code?

No. B43 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is B43 in?

B43 falls under Chapter 1: Certain infectious and parasitic diseases.

When did B43 become effective?

B43 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to B43?

B43 belongs to category B43, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.