What is ICD-10 code C47.0?

C47.0 is the ICD-10-CM diagnosis code for Malignant neoplasm of peripheral nerves of head, face and neck. A malignant tumor arising from the peripheral nerves in the head, face, and neck region. It belongs to the ICD-10-CM chapter for neoplasms (c00-d49). C47.0 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. C47.0 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. C47.0 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. C47.0 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

What is the V28 vs V24 difference for C47.0?

CMS phased in the V28 risk adjustment model over payment years 2024 (33%), 2025 (67%), and 2026 (100%), replacing V24. V28 consolidates HCC categories, removes some lower-acuity conditions, and recalibrates RAF weights across the entire model. For C47.0, V28 maps to Lymphoma and Other Cancers at RAF 0.671 while V24 mapped to Lymphoma and Other Cancers at RAF 0.675. Both models can still appear in legacy data and in payer-specific lookback periods.

What should coders know when reporting C47.0?

This code applies to nerve sheath tumors (such as malignant peripheral nerve sheath tumors) in the head and neck area. Ensure the neoplasm originates from peripheral nerve tissue, not from surrounding structures. Because C47.0 maps to a payment HCC, the documentation must also satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's risk adjustment score.

2026 ICD-10-CM C47.0: Malignant neoplasm

ICD-10-CM Code View

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Code lookupC47.0Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Neoplasms (C00-D49) / Malignant neoplasms of mesothelial and soft tissue (C45-C49)

C47.0

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

Malignant neoplasm of peripheral nerves of head, face and neck

A malignant tumor arising from the peripheral nerves in the head, face, and neck region.

Buddy Insight

Malignant peripheral nerve sheath tumors of the head, face, and neck are rare but aggressive sarcomas that arise from Schwann cells or other nerve sheath components.

CMS-HCC V28

Mapped

HCC 21

Lymphoma and Other Cancers

RAF 0.671

CMS-HCC V24

Mapped

HCC 10

Lymphoma and Other Cancers

RAF 0.675

ACA/HHS

Mapped

HCC 10

HHS-HCC 10

Varies by metal level

ESRD/PACE

Mapped

HCC 10

Lymphoma and Other Cancers

RAF 0.111

RXHCC

Mapped

HCC 22

Cancer, Other Specified Sites

RAF 0.124

Code Book Path

Official

C47Malignant neoplasm of peripheral nerves and autonomic nervous system

C47.0Malignant neoplasm of peripheral nerves of head, face and neck

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for C47.0 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for C47.0 in this effective period.

Related Child Codes

Official

C47.1Malignant neoplasm of peripheral nerves of upper limb, including shoulder

C47.2Malignant neoplasm of peripheral nerves of lower limb, including hip

C47.3Malignant neoplasm of peripheral nerves of thorax

C47.4Malignant neoplasm of peripheral nerves of abdomen

C47.5Malignant neoplasm of peripheral nerves of pelvis

Includes

Official

malignant neoplasm of sympathetic and parasympathetic nerves and ganglia

Excludes 1

Official

malignant neoplasm of peripheral nerves of orbit (C69.6-)

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for C47.0 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for C47.0 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for C47.0 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Pathology confirmation of malignant peripheral nerve sheath tumor (MPNST) or other peripheral nerve malignancy

Specific nerve or anatomical location within head/face/neck region

Tumor size, grade, and surgical margins if resected

Neurofibromatosis Type 1 status (present in 50% of MPNST cases)

MEAT Support

HCC Buddy guidance

Pathology confirmation of malignant peripheral nerve sheath tumor (MPNST) or other peripheral nerve malignancy

Specific nerve or anatomical location within head/face/neck region

Tumor size, grade, and surgical margins if resected

Neurofibromatosis Type 1 status (present in 50% of MPNST cases)

Audit Caution

HCC Buddy guidance

Confusing peripheral nerve tumors with cranial nerve tumors — cranial nerves use C72 codes, not C47

Coding a benign schwannoma or neurofibroma as malignant without pathology confirmation of malignancy

Not checking for Neurofibromatosis Type 1 (Q85.01) as a coexisting condition to code additionally

Using the connective tissue code (C49.0) instead of the peripheral nerve code (C47.0) when the tumor originates from nerve tissue

Common Mistakes

HCC Buddy guidance

D36.11 (Benign neoplasm of peripheral nerves of face) — benign nerve tumors such as schwannomas or neurofibromas

C47.9 (Malignant neoplasm of peripheral nerves, unspecified) — use C47.0 when head/face/neck is documented

C72._ (Malignant neoplasm of spinal cord, cranial nerves) — cranial nerve tumors use different codes

C49.0 (Malignant neoplasm of connective and soft tissue of head/face/neck) — soft tissue sarcoma, not nerve origin

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 C47.0 an HCC code?

Yes. C47.0 (Malignant neoplasm of peripheral nerves of head, face and neck) maps to Lymphoma and Other Cancers under the CMS-HCC V28 risk adjustment model (and Lymphoma and Other Cancers under V24), with a community non-dual aged RAF of 0.671. It is billable for payment year 2026.

Coder answer: C47.0 is billable and maps to V28 HCC 21, Lymphoma and Other Cancers. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code: C47.0
Description: Malignant neoplasm of peripheral nerves of head, face and neck
HCC (V28): HCC 21 — Lymphoma and Other Cancers
RAF: 0.671
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 21, Lymphoma and Other Cancers

0.671

V24HCC 10, Lymphoma and Other Cancers

0.675

ESRDHCC 10, Lymphoma and Other Cancers

0.111

RxHCCHCC 22, Cancer, Other Specified Sites

0.124

Each model's RAF is its CMS base weight for that model's standard population, so 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 segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.

Work C47.0 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for C47.0

For C47.0 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.

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

Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed C47.0 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

C47.0 is the ICD-10-CM diagnosis code for malignant neoplasm of peripheral nerves of head, face and neck. A malignant tumor arising from the peripheral nerves in the head, face, and neck region. C47.0 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neoplasms of mesothelial and soft tissue (c45-c49).

Under the CMS-HCC V28 risk adjustment model, C47.0 maps to Lymphoma and Other Cancers (HCC 21) with a community, non-dual, aged base RAF weight of 0.671. Under the older V24 model, C47.0 mapped to the same category but with a base RAF weight of 0.675, V28 recalibrated weights across the entire model. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.

This code applies to nerve sheath tumors (such as malignant peripheral nerve sheath tumors) in the head and neck area. Because C47.0 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. 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, RAF weights, and MEAT documentation criteria for C47.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•This code applies to nerve sheath tumors (such as malignant peripheral nerve sheath tumors) in the head and neck area.
•Ensure the neoplasm originates from peripheral nerve tissue, not from surrounding structures.

Clinical Significance

Malignant peripheral nerve sheath tumors of the head, face, and neck are rare but aggressive sarcomas that arise from Schwann cells or other nerve sheath components. These tumors are strongly associated with Neurofibromatosis Type 1 and carry a high risk of local recurrence and distant metastasis, requiring complex multidisciplinary management.

Documentation Requirements

✓Pathology confirmation of malignant peripheral nerve sheath tumor (MPNST) or other peripheral nerve malignancy
✓Specific nerve or anatomical location within head/face/neck region
✓Tumor size, grade, and surgical margins if resected
✓Neurofibromatosis Type 1 status (present in 50% of MPNST cases)
✓Imaging (MRI preferred) showing tumor extent and relationship to adjacent structures

Excludes 1, Do NOT code together

malignant neoplasm of peripheral nerves of orbit (C69.6-)

Commonly Confused Codes

•D36.11 (Benign neoplasm of peripheral nerves of face): benign nerve tumors such as schwannomas or neurofibromas
•C47.9 (Malignant neoplasm of peripheral nerves, unspecified): use C47.0 when head/face/neck is documented
•C72._ (Malignant neoplasm of spinal cord, cranial nerves): cranial nerve tumors use different codes
•C49.0 (Malignant neoplasm of connective and soft tissue of head/face/neck): soft tissue sarcoma, not nerve origin