2026 ICD-10-CM Diagnosis Code C47.4Malignant neoplasm of peripheral nerves of abdomen
ICD-10-CM Codes›C00–D49›C45-C49›C47
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 23
- Chronic Condition
C47.4 is a billable ICD-10-CM diagnosis code for malignant neoplasm of peripheral nerves of abdomen. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 542 through 544. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 2 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nervous system cancers - all other types.
For Medicare Advantage risk adjustment, C47.4 maps to CMS-HCC Category 23 (Prostate, Breast, and Other Cancers and Tumors) under the V28 model, adding a risk factor of about 0.186 for a community, non-dual, aged beneficiary in payment year 2026.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
C47.4 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2026.
Source: CMS Payment Year 2026 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Malignant neoplasm of peripheral nerve of abdomen
- Malignant nerve sheath neoplasm of peripheral nerve of abdomen
- Neoplasm of peripheral nerves of abdomen
- Primary malignant neoplasm of peripheral nerves of abdomen
- Primary malignant neoplasm of peripheral nerves of trunk
- Primary malignant nerve sheath neoplasm of peripheral nerve of abdomen
- Primary malignant nerve sheath neoplasm of peripheral nervous system structure
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
Patient EducationClinical
Cancer
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Convert C47.4 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About C47.4Overview
What is the ICD-10 code for malignant neoplasm of peripheral nerves of abdomen?
The ICD-10-CM code for malignant neoplasm of peripheral nerves of abdomen is C47.4 (sometimes written as C474). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is C47.4 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report malignant neoplasm of peripheral nerves of abdomen on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does C47.4 group to?
When malignant neoplasm of peripheral nerves of abdomen is the principal diagnosis on an inpatient stay, it groups to MS-DRG 542, 543, 544, with relative weights from 0.7546 to 1.7665 depending on complications. Higher weights mean higher Medicare reimbursement.
Is C47.4 a CC or MCC?
CMS lists C47.4 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 2 closely related codes in its exclusion list.
What is the ICD-9 equivalent of C47.4?
Under the General Equivalence Mappings, malignant neoplasm of peripheral nerves of abdomen converts to ICD-9-CM 171.5 (mal neo soft tis abdomen). The mapping is approximate, so confirm the match fits the documentation.
What HCC is C47.4?
C47.4 (malignant neoplasm of peripheral nerves of abdomen) maps to CMS-HCC Category 23 (Prostate, Breast, and Other Cancers and Tumors), commonly written as HCC 23, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2026. It mapped to HCC 10 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. In the Part D prescription drug model it maps to RxHCC 20.
Does C47.4 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, C47.4 adds a risk adjustment factor of about 0.186 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.186 to 0.237 depending on the payment segment). A more severe related category (HCC 17, HCC 18, HCC 19, HCC 20, HCC 21, and HCC 22) supersedes it when both are reported. See the full factor table on the HCC 23 category page.
