Skip to content
HCC Buddy home

C7B.09 ICD-10-CM Code: Secondary carcinoid tumors of other sites

C7B.09 maps to CMS-HCC V28 17. 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 lookupC7B.09

FY 2026 Apr update / Neoplasms (C00-D49) / Secondary neuroendocrine tumors (C7B)

C7B.09

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

Secondary carcinoid tumors of other sites

This code describes cancer that has spread to various parts of the body from a carcinoid tumor (a slow-growing neuroendocrine cancer) that originated elsewhere. Carcinoid tumors produce hormones that can cause specific symptoms like flushing and diarrhea.

Buddy the Bee presenting code insight

Buddy Insight

Secondary carcinoid tumors of other sites represents metastatic carcinoid disease at locations not captured by the specific C7B codes (liver, bone, lymph nodes, peritoneum).

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

HCC 17

Coefficient HCC 17: 4.209 (Community Non-Dual Aged (CNA))

CMS-HCC V24

Historical

Historical

Not used for CY2026 payment

ACA/HHS

HCC 008

Code-level coefficient reference

ESRD/PACE

HCC 8

Code-level coefficient reference

RXHCC

HCC 18

Code-level coefficient reference

Code Book Path

Official
C7BSecondary neuroendocrine tumorsC7B.0Secondary carcinoid tumorsC7B.09Secondary carcinoid tumors of other sites

Inclusion Terms

Official

No inclusion terms are included in this display for C7B.09. Check the code and parent instructions in the Code Book.

Excludes 2

Official

No Excludes 2 notes are included in this display for C7B.09. Check the code and parent instructions in the Code Book.

Related Codes

Official
C7B.00Secondary carcinoid tumors, unspecified siteC7B.01Secondary carcinoid tumors of distant lymph nodesC7B.02Secondary carcinoid tumors of liverC7B.03Secondary carcinoid tumors of boneC7B.04Secondary carcinoid tumors of peritoneum

Includes

Official

No Includes notes are included in this display for C7B.09. Check the code and parent instructions in the Code Book.

Excludes 1

Official

No Excludes 1 notes are included in this display for C7B.09. Check the code and parent instructions in the Code Book.

Code First

Official

No Code First sequencing instructions are included in this display for C7B.09. Check the code and parent instructions in the Code Book.

Use Additional

Official
  • code to identify any functional activityInherited from C7B

Code Also

Official

No Code Also instructions are included in this display for C7B.09. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance
Documentation confirming metastatic carcinoid at the specified site
Primary carcinoid tumor site documented and coded separately
Specific metastatic site documented clearly in the medical record
Confirmation that the site does not fit C7B.01-C7B.04 (lymph nodes, liver, bone, peritoneum)

MEAT Support

HCC Buddy guidance
Documentation confirming metastatic carcinoid at the specified site
Primary carcinoid tumor site documented and coded separately
Specific metastatic site documented clearly in the medical record
Confirmation that the site does not fit C7B.01-C7B.04 (lymph nodes, liver, bone, peritoneum)

Audit Caution

HCC Buddy guidance
Using C7B.09 when a more specific secondary carcinoid code exists (C7B.01-C7B.04)
Failing to code the primary carcinoid tumor site separately
Using generic secondary malignancy codes (C79) instead of the carcinoid-specific C7B.09
Not documenting the specific metastatic site, which provides important clinical information even with this code

Common Mistakes

HCC Buddy guidance
C7B.01-C7B.04 — Site-specific secondary carcinoid codes: Use these when the metastatic site is lymph nodes, liver, bone, or peritoneum
C7B.00 — Secondary carcinoid tumors, unspecified site: Use when the metastatic site is unknown; C7B.09 is for a known but non-standard site
C79 series — Secondary malignant neoplasm of other specified sites: Use for non-carcinoid metastatic cancers

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 C7B.09 an HCC code?

Yes. C7B.09 (Secondary carcinoid tumors of other sites) maps to HCC 17, Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 4.209. 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: C7B.09 is billable and maps to V28 HCC 17, Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code
C7B.09
Description
Secondary carcinoid tumors of other sites
HCC (V28)
HCC 17 — Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic
RAF reference coefficient
4.209
Billable
Yes
Payment year
2026

HCC Category Mapping

V28HCC 17, Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic
4.209
ESRDHCC 8, Metastatic Cancer and Acute Leukemia
Not separately weighted
RxHCCHCC 18, Secondary Cancer of Lung, Liver, Brain, and Other Sites
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 C7B.09 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for C7B.09

For C7B.09, 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

C7B.09 is the ICD-10-CM diagnosis code for secondary carcinoid tumors of other sites. This code describes cancer that has spread to various parts of the body from a carcinoid tumor (a slow-growing neuroendocrine cancer) that originated elsewhere. Carcinoid tumors produce hormones that can cause specific symptoms like flushing and diarrhea. C7B.09 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering secondary neuroendocrine tumors (c7b).

Under the CMS-HCC V28 risk adjustment model, C7B.09 maps to Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic (HCC 17) with a source-labeled community, non-dual, aged reference coefficient of 4.209. No V24 mapping is shown for C7B.09; 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.

Use this code only for metastatic carcinoid tumors at sites other than the appendix, ileum, lung, thymus, stomach, or kidney—those have their own specific codes. For C7B.09, 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 C7B.09 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • •Use this code only for metastatic carcinoid tumors at sites other than the appendix, ileum, lung, thymus, stomach, or kidney—those have their own specific codes
  • •Always code the primary carcinoid tumor site first, then use C7B.09 as a secondary diagnosis to indicate spread to other locations

Clinical Significance

Secondary carcinoid tumors of other sites represents metastatic carcinoid disease at locations not captured by the specific C7B codes (liver, bone, lymph nodes, peritoneum). This includes metastases to the brain, skin, adrenal glands, ovaries, or other uncommon sites. Any metastatic carcinoid spread significantly impacts prognosis and treatment intensity, warranting systemic therapy and specialized multidisciplinary management.

Documentation Requirements

  • ✓Documentation confirming metastatic carcinoid at the specified site
  • ✓Primary carcinoid tumor site documented and coded separately
  • ✓Specific metastatic site documented clearly in the medical record
  • ✓Confirmation that the site does not fit C7B.01-C7B.04 (lymph nodes, liver, bone, peritoneum)
  • ✓Imaging or pathology confirming carcinoid histology at the metastatic site
  • ✓Treatment plan for the metastatic disease

Commonly Confused Codes

  • •C7B.01-C7B.04: Site-specific secondary carcinoid codes: Use these when the metastatic site is lymph nodes, liver, bone, or peritoneum
  • •C7B.00: Secondary carcinoid tumors, unspecified site: Use when the metastatic site is unknown; C7B.09 is for a known but non-standard site
  • •C79 series: Secondary malignant neoplasm of other specified sites: Use for non-carcinoid metastatic cancers

Child Codes

C7B.00Secondary carcinoid tumors, unspecified site
HCC 17
C7B.01Secondary carcinoid tumors of distant lymph nodes
HCC 17
C7B.02Secondary carcinoid tumors of liver
HCC 17
C7B.03Secondary carcinoid tumors of bone
HCC 17
C7B.04Secondary carcinoid tumors of peritoneum
HCC 17
C7B.09Secondary carcinoid tumors of other sites
HCC 17

Code Hierarchy

└C7BSecondary neuroendocrine tumors└C7B.0Secondary carcinoid tumors└C7B.09Secondary carcinoid tumors of other sites
└C7B.09Secondary carcinoid tumors of other sites

Also searched as

  • C7B 09
  • C7B09

For C7B.09, 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.

C7B.09 maps to CMS-HCC V28 category 17, Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic. See the ICD-10 to HCC mapping hub for how the V28 crosswalk works. The mapping identifies a payment HCC category for C7B.09. 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 C7B.09 in HCC Buddy

Open C7B.09 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