C53.9 maps to CMS-HCC V28 22. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC coding software

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 lookupC53.9

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Neoplasms (C00-D49) / Malignant neoplasms of female genital organs (C51-C58)

C53.9

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

Malignant neoplasm of cervix uteri, unspecified

Cancer of the cervix where the specific location within the cervix is not documented or cannot be determined.

Buddy Insight

Malignant neoplasm of cervix uteri, unspecified, is used when cervical cancer is confirmed but the specific subsite (endocervix vs.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

Mapped

HCC 22

Bladder, Colorectal, and Othe...

Coefficient HCC 22: 0.363 (Community Non-Dual Aged (CNA))

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

Mapped

HCC 012

HHS-HCC 012 adult, RAF varies...

Code-level coefficient reference

ESRD/PACE

Mapped

HCC 11

Colorectal/Bladder/and Other ...

Code-level coefficient reference

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

C53Malignant neoplasm of cervix uteri C53.9Malignant neoplasm of cervix uteri, unspecified

Inclusion Terms

Official

No inclusion terms are included in this display for C53.9. Check the code and parent instructions in the Code Book.

Excludes 2

Official

No Excludes 2 notes are included in this display for C53.9. Check the code and parent instructions in the Code Book.

Related Codes

Official

C53.0Malignant neoplasm of endocervix C53.1Malignant neoplasm of exocervix C53.8Malignant neoplasm of overlapping sites of cervix uteri

Includes

Official

malignant neoplasm of skin of female genital organsInherited from C51-C58

Excludes 1

Official

carcinoma in situ of cervix uteri (D06.-)Inherited from C53

Code First

Official

No Code First sequencing instructions are included in this display for C53.9. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for C53.9. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for C53.9. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

Confirmed malignant neoplasm of the cervix

Histological type and grade

FIGO staging

Evidence that more specific subsite could not be determined

MEAT Support

HCC Buddy guidance

Confirmed malignant neoplasm of the cervix

Histological type and grade

FIGO staging

Evidence that more specific subsite could not be determined

Audit Caution

HCC Buddy guidance

Using this unspecified code when pathology or colposcopy reports specify endocervix or exocervix

Confusing carcinoma in situ (D06.x) with invasive cervical cancer (C53.x)

Using active cancer code when patient has completed treatment and is in remission (should be Z85.41)

Not reviewing colposcopy or biopsy reports which typically identify the specific cervical subsite

Common Mistakes

HCC Buddy guidance

C53.0 — Endocervix; use when the inner cervical canal is specifically involved

C53.1 — Exocervix; use when the outer cervical surface is specifically involved

C53.8 — Overlapping cervical sites; use when tumor spans endocervix and exocervix

D06.9 — Carcinoma in situ of cervix, unspecified; preinvasive disease, not invasive cancer

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 C53.9 an HCC code?

Yes. C53.9 (Malignant neoplasm of cervix uteri, unspecified) maps to HCC 22, Bladder, Colorectal, and Other Cancers under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.363. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: C53.9 is billable and maps to V28 HCC 22, Bladder, Colorectal, and Other Cancers. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code: C53.9
Description: Malignant neoplasm of cervix uteri, unspecified
HCC (V28): HCC 22 — Bladder, Colorectal, and Other Cancers
RAF reference coefficient: 0.363
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 22, Bladder, Colorectal, and Other Cancers

0.363

ESRDHCC 11, Colorectal/Bladder/and Other Cancers

Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work C53.9 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for C53.9

For C53.9, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
EEvaluate: test results, medication response, or physical findings reviewed by the provider
AAssess: explicit mention in the assessment or plan with acknowledgment of status
TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

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.

What This Code Means

C53.9 is the ICD-10-CM diagnosis code for malignant neoplasm of cervix uteri, unspecified. Cancer of the cervix where the specific location within the cervix is not documented or cannot be determined. C53.9 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neoplasms of female genital organs (c51-c58).

Under the CMS-HCC V28 risk adjustment model, C53.9 maps to Bladder, Colorectal, and Other Cancers (HCC 22) with a source-labeled community, non-dual, aged reference coefficient of 0.363. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

This is a non-specific code; query the provider for more detailed anatomical location when possible. For C53.9, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for C53.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•This is a non-specific code; query the provider for more detailed anatomical location when possible
•Ensure all available staging and histological information is captured even if site is unspecified

Clinical Significance

Malignant neoplasm of cervix uteri, unspecified, is used when cervical cancer is confirmed but the specific subsite (endocervix vs. exocervix) is not documented. While commonly used, this code represents a documentation opportunity because pathology reports and colposcopy findings typically specify the cervical subsite.

Documentation Requirements

✓Confirmed malignant neoplasm of the cervix
✓Histological type and grade
✓FIGO staging
✓Evidence that more specific subsite could not be determined
✓Human Papillomavirus status if available
✓Treatment plan and current disease status

Commonly Confused Codes

•C53.0: Endocervix; use when the inner cervical canal is specifically involved
•C53.1: Exocervix; use when the outer cervical surface is specifically involved
•C53.8: Overlapping cervical sites; use when tumor spans endocervix and exocervix
•D06.9: Carcinoma in situ of cervix, unspecified; preinvasive disease, not invasive cancer
•Z85.41: Personal history of cervical cancer; use when treatment is completed and no active disease