D41.21 ICD-10-CM Code: Neoplasm of uncertain behavior of right ureter
D41.21 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Neoplasms (C00-D49) / Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)
D41.21
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceNeoplasm of uncertain behavior of right ureter
A growth in the right ureter (the tube that carries urine from the kidney) that cannot yet be classified as definitely cancer or definitely benign.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for D41.21 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for D41.21 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for D41.21 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for D41.21 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for D41.21 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for D41.21 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for D41.21 in this effective period.
Buddy Documentation Tip
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 D41.21 an HCC code?
No. D41.21 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
- D41.21
- Description
- Neoplasm of uncertain behavior of right ureter
- 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
D41.21 is the ICD-10-CM diagnosis code for neoplasm of uncertain behavior of right ureter. A growth in the right ureter (the tube that carries urine from the kidney) that cannot yet be classified as definitely cancer or definitely benign. D41.21 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (d37-d48).
D41.21 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.
Ensure laterality is documented as right; do not use this code for left-sided lesions.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for D41.21 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Ensure laterality is documented as right; do not use this code for left-sided lesions
- •This code indicates uncertain behavior - follow-up imaging or pathology results may lead to recoding with a more specific diagnosis