What is ICD-10 code C72.30?

C72.30 is the ICD-10-CM diagnosis code for Malignant neoplasm of unspecified optic nerve. A malignant (cancerous) tumor of the optic nerve when the specific side (right or left) is not documented or is bilateral. It belongs to the ICD-10-CM chapter for neoplasms (c00-d49). C72.30 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. C72.30 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. C72.30 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. C72.30 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.

Which HCC does C72.30 map to under V28?

C72.30 maps to CMS-HCC V28 20 (Lung and Other Severe Cancers). The category number and label come from the CMS-HCC V28 model file for payment year 2026.

What does C72.30 pay in RAF?

C72.30 carries a community, non-dual, aged (CNA) RAF weight of 1.136 under CMS-HCC V28 for payment year 2026. The weight comes from the CMS V28 relative-factor file, not a hand-typed table.

What is the V28 vs V24 difference for C72.30?

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 C72.30, V28 maps to Lung and Other Severe Cancers at RAF 1.136 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 documentation supports C72.30?

Use this code only when laterality is unspecified; prefer C72.31 or C72.32 if side is documented If bilateral involvement is documented, code both sides separately rather than using the unspecified code Because C72.30 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. See the MEAT criteria checklist at /meat-criteria for what Monitor, Evaluate, Assess, or Treat looks like in a note. MEAT is generic documentation evidence, not a payer-specific rule.

2026 ICD-10-CM C72.30: Malignant neoplasm

C72.30 maps to CMS-HCC V28 20 (RAF 1.136). Documentation must support MEAT. MEAT criteria · RAF calculator · free HCC coding tools

ICD-10-CM Code View

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Code lookupC72.30Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Neoplasms (C00-D49) / Malignant neoplasms of eye, brain and other parts of central nervous system (C69-C72)

C72.30

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

Malignant neoplasm of unspecified optic nerve

A malignant (cancerous) tumor of the optic nerve when the specific side (right or left) is not documented or is bilateral.

Buddy Insight

Malignant neoplasm of the unspecified optic nerve represents cancer of cranial nerve II without laterality documentation.

CMS-HCC V28

Mapped

HCC 20

Lung and Other Severe Cancers

RAF 1.136

CMS-HCC V24

Mapped

HCC 10

Lymphoma and Other Cancers

RAF 0.675

ACA/HHS

Mapped

HCC 9

HHS-HCC 9

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

C72Malignant neoplasm of spinal cord, cranial nerves and other parts of central nervous system

C72.3Malignant neoplasm of optic nerve

C72.30Malignant neoplasm of unspecified optic nerve

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for C72.30 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for C72.30 in this effective period.

Related Child Codes

Official

C72.31Malignant neoplasm of right optic nerve

C72.32Malignant neoplasm of left optic nerve

Includes

Official

ICD-10-CM does not list Includes notes for C72.30 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for C72.30 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for C72.30 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for C72.30 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for C72.30 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Pathology or imaging confirmation of malignant optic nerve tumor

Laterality — query provider to determine right (C72.31) or left (C72.32) when not specified

Visual acuity and visual field assessment results

Extent of disease — intraorbital vs. intracranial extension

MEAT Support

HCC Buddy guidance

Pathology or imaging confirmation of malignant optic nerve tumor

Laterality — query provider to determine right (C72.31) or left (C72.32) when not specified

Visual acuity and visual field assessment results

Extent of disease — intraorbital vs. intracranial extension

Audit Caution

HCC Buddy guidance

Using unspecified code when laterality is available elsewhere in the record (imaging reports, ophthalmology notes)

Confusing optic nerve gliomas (often low-grade in children) with confirmed malignant neoplasms

Coding orbital tumors as optic nerve tumors without confirmation of nerve origin

Not distinguishing between primary optic nerve tumor and tumor compressing the optic nerve

Common Mistakes

HCC Buddy guidance

C72.31/C72.32 — Right/left optic nerve: Use lateralized codes when side is documented

C69.60-C69.62 — Malignant neoplasm of orbit: Orbital tumors are not synonymous with optic nerve tumors

D33.3 — Benign neoplasm of cranial nerves: Optic nerve gliomas in children are often low-grade; verify malignancy

H47.019 — Optic neuritis, unspecified: Inflammatory condition, not neoplastic

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 C72.30 an HCC code?

Yes. C72.30 (Malignant neoplasm of unspecified optic nerve) maps to Lung and Other Severe Cancers under the CMS-HCC V28 risk adjustment model (and Lymphoma and Other Cancers under V24), with a community non-dual aged RAF of 1.136. It is billable for payment year 2026.

Coder answer: C72.30 is billable and maps to V28 HCC 20, Lung and Other Severe Cancers. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code: C72.30
Description: Malignant neoplasm of unspecified optic nerve
HCC (V28): HCC 20 — Lung and Other Severe Cancers
RAF: 1.136
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 20, Lung and Other Severe Cancers

1.136

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 C72.30 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for C72.30

For C72.30 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 C72.30 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

C72.30 is the ICD-10-CM diagnosis code for malignant neoplasm of unspecified optic nerve. A malignant (cancerous) tumor of the optic nerve when the specific side (right or left) is not documented or is bilateral. C72.30 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neoplasms of eye, brain and other parts of central nervous system (c69-c72).

Under the CMS-HCC V28 risk adjustment model, C72.30 maps to Lung and Other Severe Cancers (HCC 20) with a community, non-dual, aged base RAF weight of 1.136. Under the older CMS-HCC V24 model, C72.30 maps to Lymphoma and Other Cancers (HCC 10) with a community, non-dual, aged base RAF weight of 0.675. 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.

Use this code only when laterality is unspecified; prefer C72.31 or C72.32 if side is documented. Because C72.30 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 C72.30 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Use this code only when laterality is unspecified; prefer C72.31 or C72.32 if side is documented
•If bilateral involvement is documented, code both sides separately rather than using the unspecified code

Clinical Significance

Malignant neoplasm of the unspecified optic nerve represents cancer of cranial nerve II without laterality documentation. Optic nerve malignancies, most commonly optic nerve gliomas, significantly impact vision and may extend intracranially. The unspecified designation should trigger a query for laterality, as treatment and prognosis depend on which eye is affected.

Documentation Requirements

✓Pathology or imaging confirmation of malignant optic nerve tumor
✓Laterality — query provider to determine right (C72.31) or left (C72.32) when not specified
✓Visual acuity and visual field assessment results
✓Extent of disease — intraorbital vs. intracranial extension
✓Treatment plan including any planned surgery, radiation, or chemotherapy

Commonly Confused Codes

•C72.31/C72.32: Right/left optic nerve: Use lateralized codes when side is documented
•C69.60-C69.62: Malignant neoplasm of orbit: Orbital tumors are not synonymous with optic nerve tumors
•D33.3: Benign neoplasm of cranial nerves: Optic nerve gliomas in children are often low-grade; verify malignancy
•H47.019: Optic neuritis, unspecified: Inflammatory condition, not neoplastic