Skip to content
HCC Buddy home

D3A.022 ICD-10-CM Code: Benign carcinoid tumor of the ascending colon

D3A.022 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 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 lookupD3A.022

FY 2026 Apr update / Neoplasms (C00-D49) / Benign neuroendocrine tumors (D3A)

D3A.022

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

Benign carcinoid tumor of the ascending colon

A benign neuroendocrine tumor located in the ascending colon, the first vertical section of the large intestine on the right side.

Buddy the Bee presenting code insight

Buddy Insight

Benign carcinoid tumor of the ascending colon is a rare well-differentiated neuroendocrine tumor arising in the ascending portion of the right colon.

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

HCC 22

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

CMS-HCC V24

Historical

Historical

Not used for CY2026 payment

ACA/HHS

N/A

—

Not mapped

ESRD/PACE

N/A

—

Not mapped

RXHCC

HCC 22

Code-level coefficient reference

Code Book Path

Official
D3A.0Benign carcinoid tumorsD3A.02Benign carcinoid tumors of the appendix, large intestine, and rectumD3A.022Benign carcinoid tumor of the ascending colon

Inclusion Terms

Official

No inclusion terms are included in this display for D3A.022. Check the code and parent instructions in the Code Book.

Excludes 2

Official
  • benign pancreatic islet cell tumors (D13.7)Inherited from D3A

Related Codes

Official
D3A.020Benign carcinoid tumor of the appendixD3A.021Benign carcinoid tumor of the cecumD3A.023Benign carcinoid tumor of the transverse colonD3A.024Benign carcinoid tumor of the descending colonD3A.025Benign carcinoid tumor of the sigmoid colon

Includes

Official

No Includes notes are included in this display for D3A.022. Check the code and parent instructions in the Code Book.

Excludes 1

Official

No Excludes 1 notes are included in this display for D3A.022. Check the code and parent instructions in the Code Book.

Code First

Official

No Code First sequencing instructions are included in this display for D3A.022. Check the code and parent instructions in the Code Book.

Use Additional

Official
  • code to identify any associated endocrine syndrome, such as:Inherited from D3A
  • carcinoid syndrome (E34.00)Inherited from D3A

Code Also

Official
  • any associated multiple endocrine neoplasia [MEN] syndromes (E31.2-)Inherited from D3A

Buddy Documentation Tip

HCC Buddy guidance
Colonoscopy or surgical pathology confirming a well-differentiated neuroendocrine tumor with documentation of the ascending colon location.
Include tumor size, Ki-67 proliferative index, mitotic rate, and depth of invasion.
Document the treatment approach (endoscopic resection vs.
right hemicolectomy) and planned surveillance colonoscopy interval.

MEAT Support

HCC Buddy guidance
Colonoscopy or surgical pathology confirming a well-differentiated neuroendocrine tumor with documentation of the ascending colon location.
Include tumor size, Ki-67 proliferative index, mitotic rate, and depth of invasion.
Document the treatment approach (endoscopic resection vs.
right hemicolectomy) and planned surveillance colonoscopy interval.

Audit Caution

HCC Buddy guidance
Colonic carcinoids have a higher malignant potential than appendiceal carcinoids, so careful pathologic review is essential before coding as benign.
Larger tumors (over 2cm) and those with deep invasion are more likely malignant and may require C7A series codes.
Ensure the specific colonic segment is accurately documented from colonoscopy distance measurements or surgical landmarks.

Common Mistakes

HCC Buddy guidance
D3A.021 (cecum) is for the adjacent cecal location
D3A.025 (transverse colon) is for the next colonic segment
C7A.022 (malignant carcinoid of ascending colon) is for tumors demonstrating malignant behavior
D12.2 (benign neoplasm of ascending colon) covers other benign tumors like adenomatous polyps.

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 D3A.022 an HCC code?

Yes. D3A.022 (Benign carcinoid tumor of the ascending colon) 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: D3A.022 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
D3A.022
Description
Benign carcinoid tumor of the ascending colon
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
RxHCCHCC 22, Prostate, Breast, Bladder, and Other Cancers and Tumors
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 D3A.022 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for D3A.022

For D3A.022, 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

D3A.022 is the ICD-10-CM diagnosis code for benign carcinoid tumor of the ascending colon. A benign neuroendocrine tumor located in the ascending colon, the first vertical section of the large intestine on the right side. D3A.022 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering benign neuroendocrine tumors (d3a).

Under the CMS-HCC V28 risk adjustment model, D3A.022 maps to Bladder, Colorectal, and Other Cancers (HCC 22) with a source-labeled community, non-dual, aged reference coefficient of 0.363. No V24 mapping is shown for D3A.022; use the applicable model and payment year when reviewing the V28 mapping. 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.

Confirm the tumor location is specifically the ascending colon, not other colon segments. For D3A.022, 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 D3A.022 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • •Confirm the tumor location is specifically the ascending colon, not other colon segments
  • •Document whether the tumor is causing any obstruction or other complications

Clinical Significance

Benign carcinoid tumor of the ascending colon is a rare well-differentiated neuroendocrine tumor arising in the ascending portion of the right colon. Colonic carcinoid tumors are uncommon compared to small bowel and appendiceal locations, and ascending colon carcinoids may present with vague abdominal symptoms, anemia, or be discovered incidentally during colonoscopy. They require careful pathologic assessment as colonic carcinoids have a higher malignant potential than appendiceal carcinoids.

Documentation Requirements

  • ✓Colonoscopy or surgical pathology confirming a well-differentiated neuroendocrine tumor with documentation of the ascending colon location.
  • ✓Include tumor size, Ki-67 proliferative index, mitotic rate, and depth of invasion.
  • ✓Document the treatment approach (endoscopic resection vs.
  • ✓right hemicolectomy) and planned surveillance colonoscopy interval.
  • ✓Biochemical markers should be included if carcinoid syndrome is suspected.

Commonly Confused Codes

  • •D3A.021 (cecum) is for the adjacent cecal location
  • •D3A.025 (transverse colon) is for the next colonic segment
  • •C7A.022 (malignant carcinoid of ascending colon) is for tumors demonstrating malignant behavior
  • •D12.2 (benign neoplasm of ascending colon) covers other benign tumors like adenomatous polyps.

Child Codes

D3A.020Benign carcinoid tumor of the appendix
HCC 22
D3A.021Benign carcinoid tumor of the cecum
HCC 22
D3A.022Benign carcinoid tumor of the ascending colon
HCC 22
D3A.023Benign carcinoid tumor of the transverse colon
HCC 22
D3A.024Benign carcinoid tumor of the descending colon
HCC 22
D3A.025Benign carcinoid tumor of the sigmoid colon
HCC 22
D3A.026Benign carcinoid tumor of the rectum
HCC 22
D3A.029Benign carcinoid tumor of the large intestine, unspecified portion
HCC 22

Code Hierarchy

└D3ABenign neuroendocrine tumors└D3A.0Benign carcinoid tumors└D3A.02Benign carcinoid tumors of the appendix, large intestine, and rectum└D3A.022Benign carcinoid tumor of the ascending colon
└D3A.022Benign carcinoid tumor of the ascending colon

Also searched as

  • D3A 022
  • D3A022

For D3A.022, 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.

D3A.022 maps to CMS-HCC V28 category 22, Bladder, Colorectal, and Other Cancers. See the ICD-10 to HCC mapping hub for how the V28 crosswalk works. The mapping identifies a payment HCC category for D3A.022. Review its source-labeled HCC coefficient above, check the RAF Calculator with complete member context for CMS-HCC V28 PY2026, and confirm the documentation the chart needs before the code is submitted. HCC Buddy shows no RAF score unless every required source and calculation check passes.

Work D3A.022 in HCC Buddy

Open D3A.022 in the Code Book for the full Index-to-Tabular path, MEAT checklist, and V28 HCC mapping, or in the Encoder to code from a keyword search. Pro includes 7 days to try everything, no card required.

Open in Code BookOpen in EncoderStart Pro