ICD-10/A75.1

A75.1 ICD 2026 Code: Recrudescent typhus Brill's disease

A75.1 is the authoritative medical code for Recrudescent typhus Brill's disease. This classification is used in medical billing and clinical recording to specify the clinical criteria for recrudescent typhus brill's disease (ICD-10-CM A75.1), ensuring healthcare documentation aligns with 2026 federal coding standards.

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Official Registry Overview & Definition

Recrudescent typhus Brill's disease is a billable ICD-10-CM diagnosis code A75.1. Inclusion terms: Brill-Zinsser disease. Excludes1 (not coded here): rickettsiosis due to Ehrlichia sennetsu A79.81.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for A75.1 in the official ICD-10-CM tabular list.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Brill-Zinsser disease

Excludes1 — Not Coded Here

Conditions that can never be reported with this code; the two are mutually exclusive.

  • rickettsiosis due to Ehrlichia sennetsu A79.81

Frequently Asked Questions (FAQ) & Clinical Guidance

What can't be coded together with A75.1?

Per Excludes1 instructions, A75.1 must not be reported with: rickettsiosis due to Ehrlichia sennetsu (A79.81).

What conditions are included under A75.1?

Recrudescent typhus Brill's disease includes: Brill-Zinsser disease.

Codes in This Family (5)

Official ICD-10-CM classifications in the same code family as A75.1, with their registry titles.

  • A75 — Typhus fever
  • A75.0 — Epidemic louse-borne typhus fever due to Rickettsia prowazekii
  • A75.2 — Typhus fever due to Rickettsia typhi
  • A75.3 — Typhus fever due to Rickettsia tsutsugamushi
  • A75.9 — Typhus fever, unspecified

Indexed Clinical Terms (8)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Brill (-Zinsser) disease (recrudescent typhus)
  • Disease, diseased, Brill-Zinsser (recrudescent typhus)
  • Disease, diseased, Brill's (recrudescent typhus)
  • Infection, infected, infective (opportunistic), typhus, recrudescent
  • Recrudescent typhus (fever)
  • Typhus (fever), due to Rickettsia, prowazekii, recrudescent
  • Typhus (fever), exanthematicus SAI, brillii SAI
  • Typhus (fever), recrudescent

Related Codes & Numerical Sequence (Crawl Map)

Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:

ICD Code A71.1 Active stage of trachoma
ICD Code A77.1 Spotted fever due to Rickettsia conorii
ICD Code A79.1 Rickettsialpox due to Rickettsia akari
ICD Code A80.1 Acute paralytic poliomyelitis, wild virus, imported
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