2026 ICD-10-CM Diagnosis Code A52.79Other symptomatic late syphilis

ICD-10-CM Codes›A00–B99›A50-A64›A52

ICD-10-CM A52.79
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A52.79 is a billable ICD-10-CM diagnosis code for other symptomatic late syphilis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sexually transmitted infections (excluding HIV and hepatitis).

Code Identity

ICD-10-CM Code
A52.79
Billable Status
Yes — Valid for Submission
Code Describes
Other symptomatic late syphilis
Short Description
Other symptomatic late syphilis
Same as the full description in the CMS dataset.
Parent Code
A52.7
Other symptomatic late syphilis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA50-A64Infections with a predominantly sexual mode of transmission
CategoryA52Late syphilis
This CodeA52.79Other symptomatic late syphilis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Endocochlear syphilis
  • Infection involving inner ear
  • Late syphilis of mucous membrane
  • Late syphilis of skin
  • Late syphilis with clinical manifestations other than neurosyphilis
  • Leukoplakia of tongue
  • Nodular syphilide
  • Oral mucous membrane lesion due to late syphilis
  • Oral syphilis
  • Syphilis of breast
  • Syphilitic gumma
  • Syphilitic gumma of oral cavity
  • Syphilitic leukoplakia of tongue
  • Syphilitic oral leukoplakia

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Late syphilitic leukoderma
  • Syphilis of adrenal gland
  • Syphilis of pituitary gland
  • Syphilis of thyroid gland
  • Syphilitic splenomegaly

Type 1 Excludes

  • syphilitic leukoderma secondary A51.39

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • syphilitic (acquired) (late)
    • Atrophoderma, atrophodermia(of)
      • maculatum
        • et striatum
          • due to syphilis
    • Atrophy, atrophic(of)
      • macular (dermatological)
        • syphilitic, skin
          • striated
    • Atrophy, atrophic(of)
      • striate (skin)
        • syphilitic
    • Babinski's syndrome
    • Gumma(syphilitic)
    • Gumma(syphilitic)
      • palate (soft)
    • Gumma(syphilitic)
      • pituitary
    • Gumma(syphilitic)
      • skin
    • Gumma(syphilitic)
      • specified site NEC
    • Gumma(syphilitic)
      • tongue
    • Labyrinthitis(circumscribed) (destructive) (diffuse) (inner ear) (latent) (purulent) (suppurative)
      • syphilitic
    • Leukoderma, leukodermia NEC
      • syphilitic
        • late
    • Leukoplakia
      • syphilitic (late)
    • Lymphadenitis
      • syphilitic (early) (secondary)
        • late
    • Perforation, perforated(nontraumatic) (of)
      • palate
        • syphilitic
    • Perforation, perforated(nontraumatic) (of)
      • palatine vault
        • syphilitic
    • Perforation, perforated(nontraumatic) (of)
      • uvula
        • syphilitic
    • Rupia(syphilitic)
      • tertiary
    • Splenomegaly, splenomegalia(Bengal) (cryptogenic) (idiopathic) (tropical)
      • syphilitic
    • Stenosis, stenotic(cicatricial)
      • esophagus
        • syphilitic
    • Stricture
      • esophagus
        • syphilitic
    • Stricture
      • syphilitic NEC
    • Syphilid
      • tubercular (late)
    • Syphilis, syphilitic(acquired)
      • abdomen (late)
    • Syphilis, syphilitic(acquired)
      • adrenal (gland) (with cortical hypofunction)
    • Syphilis, syphilitic(acquired)
      • anemia (late)
    • Syphilis, syphilitic(acquired)
      • breast (late)
    • Syphilis, syphilitic(acquired)
      • ear
    • Syphilis, syphilitic(acquired)
      • ear
        • inner
    • Syphilis, syphilitic(acquired)
      • esophagus
    • Syphilis, syphilitic(acquired)
      • gumma NEC
    • Syphilis, syphilitic(acquired)
      • internal ear
    • Syphilis, syphilitic(acquired)
      • late
        • specified site NEC
    • Syphilis, syphilitic(acquired)
      • late
        • symptomatic or with manifestations
    • Syphilis, syphilitic(acquired)
      • leukoderma
        • late
    • Syphilis, syphilitic(acquired)
      • lienitis
    • Syphilis, syphilitic(acquired)
      • lip
        • late
    • Syphilis, syphilitic(acquired)
      • lymph gland (early) (secondary)
        • late
    • Syphilis, syphilitic(acquired)
      • macular atrophy of skin
        • striated
    • Syphilis, syphilitic(acquired)
      • mouth (secondary)
        • late
    • Syphilis, syphilitic(acquired)
      • mucocutaneous (secondary)
        • late
    • Syphilis, syphilitic(acquired)
      • mucous
        • membrane (secondary)
          • late
    • Syphilis, syphilitic(acquired)
      • nodular superficial (late)
    • Syphilis, syphilitic(acquired)
      • palate (late)
    • Syphilis, syphilitic(acquired)
      • peripheral nerve
    • Syphilis, syphilitic(acquired)
      • pituitary (gland)
    • Syphilis, syphilitic(acquired)
      • skin (with ulceration) (early) (secondary)
        • late or tertiary
    • Syphilis, syphilitic(acquired)
      • spleen
    • Syphilis, syphilitic(acquired)
      • splenomegaly
    • Syphilis, syphilitic(acquired)
      • tertiary
        • with symptoms NEC
    • Syphilis, syphilitic(acquired)
      • tertiary
        • multiple NEC
    • Syphilis, syphilitic(acquired)
      • tertiary
        • specified site NEC
    • Syphilis, syphilitic(acquired)
      • thymus (gland) (late)
    • Syphilis, syphilitic(acquired)
      • thyroid (late)
    • Syphilis, syphilitic(acquired)
      • tongue (late)
    • Syphilis, syphilitic(acquired)
      • ulcer (any site) (early) (secondary)
        • late
    • Syphilis, syphilitic(acquired)
      • ulcer (any site) (early) (secondary)
        • perforating
    • Syphilis, syphilitic(acquired)
      • uvula (late) (perforated)
    • Syphiloma
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • syphilitic (any site) (early) (secondary)
        • late
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • syphilitic (any site) (early) (secondary)
        • perforating

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF010
Sexually transmitted infections (excluding HIV and hepatitis)
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Hairy Leukoplakia of Tongue

    an epithelial hyperplasia on the surface of the tongue associated with epstein-barr virus and found almost exclusively in persons with hiv infection. the lesion consists of a white patch that is often corrugated or hairy.

  • Leukoplakia of Tongue

    a clinical term that indicates the presence of a white patch on the surface of the tongue which cannot be characterized as any other disease. it may be a precancerous condition and in most cases histologic examination reveals keratosis.

Patient EducationClinical

Syphilis

Syphilis is a sexually transmitted infection (STI) caused by bacteria. It infects the genital area, lips, mouth, or anus of both men and women. You usually get syphilis from sexual contact with someone who has it. It can also pass from mother to baby during pregnancy.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert A52.79 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
095.8 Late sympt syphilis NEC
Approximate The match is approximate rather than exact.
ICD-9-CM
095.9 Late sympt syphilis NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A52.79Overview

Is A52.79 (Other symptomatic late syphilis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other symptomatic late syphilis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does A52.79 group to?

When other symptomatic late syphilis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, with relative weights from 0.7297 to 2.0932 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A52.79?

Under the General Equivalence Mappings, other symptomatic late syphilis converts to ICD-9-CM 095.8 (late sympt syphilis NEC) and 095.9 (late sympt syphilis NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.