2027 ICD-10-CM Diagnosis Code A63Other predominantly sexually transmitted diseases, not elsewhere classified

ICD-10-CM Codes›A00–B99›A50-A64›A63

ICD-10-CM A63
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

A63 is a non-billable ICD-10-CM category code for other predominantly sexually transmitted diseases, not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A63.0 and A63.8.

Code Identity

ICD-10-CM Code
A63
Billable Status
No — Non-Billable Category
Code Describes
Other predominantly sexually transmitted diseases, not elsewhere classified
Short Description
Oth predominantly sexually transmitted diseases, NEC
Chapter
A50-A64
Infections with a predominantly sexual mode of transmission

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA50-A64Infections with a predominantly sexual mode of transmission
CategoryA63Other predominantly sexually transmitted diseases, not elsewhere classified
This CodeA63Other predominantly sexually transmitted diseases, not elsewhere classified

Specific Coding for Oth predominantly sexually transmitted diseases, NECOverview

Non-specific codes like A63 require more characters. Use one of these billable codes instead:

  • Use A63.0 for Anogenital (venereal) warts

  • Use A63.8 for Other specified predominantly sexually transmitted diseases

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A63: its own notes plus those printed at block A50-A64 and Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block A50-A64 Infections with a predominantly sexual mode of transmission applies to 142 codes
  • nonspecific and nongonococcal urethritis (N34.1)
  • Reiter's disease (M02.3-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On A63 itself
  • molluscum contagiosum (B08.1)
  • papilloma of cervix (D26.0)
From Block A50-A64 Infections with a predominantly sexual mode of transmission applies to 142 codes
  • human immunodeficiency virus [HIV] disease (B20)
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name A63, its category, or a range that includes it.

Applicable To 1

These notes mention A63.

  • O98.3 Other infections with a predominantly sexual mode of transmission complicating pregnancy, childbirth and the puerperium
    Conditions in A55-A64 names A55-A64, which includes this code

Patient EducationClinical

Sexually Transmitted Infections

Sexually transmitted infections (STIs) are infections that are passed from one person to another through sexual contact. If not treated, an STI can develop into a sexually transmitted disease (STD).

The full article covers:

  • What are sexually transmitted infections (STIs)?
  • What causes sexually transmitted infections (STIs)?
  • Who is affected by sexually transmitted infections (STIs)?
  • What are the symptoms of sexually transmitted infections (STIs)?
  • How are sexually transmitted infections (STIs) diagnosed?
  • What are the treatments for sexually transmitted infections (STIs)?
  • Can sexually transmitted infections (STIs) be prevented?

Read the full article at MedlinePlus

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

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About A63Overview

Is A63 a billable code?

No. This is a category header that groups the codes for other predominantly sexually transmitted diseases, not elsewhere classified, and headers cannot be submitted on claims. Claims for other predominantly sexually transmitted diseases, not elsewhere classified need a more specific code from this category, such as A63.0 and A63.8.

Can A63 be reported with N34.1?

Not as a rule. The Excludes1 note at block A50-A64, which applies to A63, lists "nonspecific and nongonococcal urethritis (N34.1)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).