What is ICD-10 code A18.18?

A18.18 is the ICD-10-CM diagnosis code for Tuberculosis of other female genital organs. It belongs to the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99). A18.18 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. A18.18 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. A18.18 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. A18.18 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Which HCC does A18.18 map to under V28?

A18.18 has no payable CMS-HCC V28 mapping in the final FY2026 CMS file.

What RAF reference is published for A18.18?

A18.18 has no V28 reference coefficient because the final FY2026 source verifies no payable V28 mapping.

What is the V28 vs V24 difference for A18.18?

A18.18 has verified no payable V28 mapping in the final FY2026 source. Select a historical effective period before making any V24 comparison.

2026 ICD-10-CM A18.18: Tuberculosis of other female genital

A18.18 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools

ICD-10-CM Code View

HCC Buddy Code Card

Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.

Code lookupA18.18

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Tuberculosis (A15-A19)

A18.18

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Tuberculosis of other female genital organs

This code describes a tuberculosis infection affecting female reproductive organs other than the fallopian tubes or endometrium, such as the ovaries or vagina. It represents an extrapulmonary form of tuberculosis that has spread to the female genital tract.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

A18Tuberculosis of other organs A18.1Tuberculosis of genitourinary system A18.18Tuberculosis of other female genital organs

Inclusion Terms

Official

Tuberculous ulceration of vulva

Excludes 2

Official

carrier or suspected carrier of infectious disease (Z22.-)Inherited from A00-B99
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)Inherited from A00-B99
infectious and parasitic diseases specific to the perinatal period (P35-P39)Inherited from A00-B99
influenza and other acute respiratory infections (J00-J22)Inherited from A00-B99

Related Codes

Official

A18.10Tuberculosis of genitourinary system, unspecified A18.11Tuberculosis of kidney and ureter A18.12Tuberculosis of bladder A18.13Tuberculosis of other urinary organs A18.14Tuberculosis of prostate

Includes

Official

diseases generally recognized as communicable or transmissibleInherited from A00-B99, A15-A19
infections due to Mycobacterium tuberculosis and Mycobacterium bovisInherited from A00-B99, A15-A19

Excludes 1

Official

certain localized infections - see body system-related chaptersInherited from A00-B99, A15-A19
congenital tuberculosis (P37.0)Inherited from A00-B99, A15-A19
nonspecific reaction to test for tuberculosis without active tuberculosis (R76.1-)Inherited from A00-B99, A15-A19
pneumoconiosis associated with tuberculosis, any type in A15 (J65)Inherited from A00-B99, A15-A19
positive PPD (R76.11)Inherited from A00-B99, A15-A19
positive tuberculin skin test without active tuberculosis (R76.11)Inherited from A00-B99, A15-A19
sequelae of tuberculosis (B90.-)Inherited from A00-B99, A15-A19
silicotuberculosis (J65)Inherited from A00-B99, A15-A19

Code First

Official

No Code First sequencing instructions are included in this display for A18.18. Check the code and parent instructions in the Code Book.

Use Additional

Official

code to identify resistance to antimicrobial drugs (Z16.-)Inherited from A00-B99, A15-A19
code, if applicable, for associated cachexia (E88.A)Inherited from A00-B99, A15-A19

Code Also

Official

No Code Also instructions are included in this display for A18.18. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

Verify documentation specifies which female genital organ is affected (ovary, vagina, etc.) to ensure accurate coding and rule out more specific sites like fallopian tubes (A18.17) or endometrium (A18.16)

Confirm tuberculosis is confirmed (not suspected) and document whether this is drug-susceptible or drug-resistant TB, as this may require additional codes for treatment resistance

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is A18.18 an HCC code?

No. A18.18 is a billable ICD-10-CM code with no mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models.

Code: A18.18
Description: Tuberculosis of other female genital organs
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: Yes
Payment year: 2026

Coder workflow notes

Get the V28 mapping + MEAT cheat sheet

One printable reference: check representative V28 mappings and the documentation reminders your note needs. Free, no card.

Free PDF. No card. Unsubscribe anytime.

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A18.18 is the ICD-10-CM diagnosis code for tuberculosis of other female genital organs. This code describes a tuberculosis infection affecting female reproductive organs other than the fallopian tubes or endometrium, such as the ovaries or vagina. It represents an extrapulmonary form of tuberculosis that has spread to the female genital tract. A18.18 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering tuberculosis (a15-a19).

A18.18 is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for A18.18 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Verify documentation specifies which female genital organ is affected (ovary, vagina, etc.) to ensure accurate coding and rule out more specific sites like fallopian tubes (A18.17) or endometrium (A18.16)
•Confirm tuberculosis is confirmed (not suspected) and document whether this is drug-susceptible or drug-resistant TB, as this may require additional codes for treatment resistance