2026 ICD-10-CM Diagnosis Code M30.0Polyarteritis nodosa
ICD-10-CM Codes›M00–M99›M30-M36›M30
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 94
- Chronic Condition
M30.0 is a billable ICD-10-CM diagnosis code for polyarteritis nodosa. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 545 through 547. 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 74 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Systemic lupus erythematosus and connective tissue disorders and Vasculitis.
For Medicare Advantage risk adjustment, M30.0 maps to CMS-HCC Category 94 (Systemic Lupus Erythematosus and Other Specified Systemic Connective Tissue Disorders) under the V28 model, adding a risk factor of about 0.268 for a community, non-dual, aged beneficiary in payment year 2026.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
M30.0 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.
- Benign cutaneous periarteritis nodosa
- Cutaneous polyarteritis nodosa
- Dementia due to polyarteritis nodosa
- Myopathy due to polyarteritis nodosa
- Nephrotic syndrome in polyarteritis nodosa
- Periarteritis
- Polyarteritis
- Polyarteritis nodosa
- Polyarteritis nodosa with multi-organ involvement
- Polyarteritis nodosa with single organ involvement
- Polyneuropathy in collagen vascular disease
- Polyneuropathy in polyarteritis nodosa
- Primary systemic arteritis
- Retinal vasculitis due to polyarteritis nodosa
- Vasculitis due to systemic disease
- Vasculitis of medium sized vessel
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Dementia (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety) F03.90
polyarteritis nodosa See Also: Dementia, in, diseases specified elsewhere; M30.0
with behavioral disturbance See Also: Dementia, in, diseases specified elsewhere; M30.0
disease M30.0
Panangiitis M30.0
Panarteritis nodosa M30.0
Polyangiitis M30.0
nodosa M30.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Polyarteritis Nodosa
a form of necrotizing non-granulomatous inflammation occurring primarily in medium-sized arteries, often with microaneurysms. it is characterized by muscle, joint, and abdominal pain resulting from arterial infarction and scarring in affected organs. polyarteritis nodosa with lung involvement is called churg-strauss syndrome.
Patient EducationClinical
Vasculitis
Vasculitis is an inflammation of the blood vessels. It happens when the body's immune system attacks the blood vessel by mistake. It can happen because of an infection, a medicine, or another disease. The cause is often unknown.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M30.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M30.0Overview
What is the ICD-10 code for polyarteritis nodosa?
The ICD-10-CM code for polyarteritis nodosa is M30.0 (sometimes written as M300). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is M30.0 (Polyarteritis nodosa and related conditions) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report polyarteritis nodosa on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M30.0 group to?
When polyarteritis nodosa is the principal diagnosis on an inpatient stay, it groups to MS-DRG 545, 546, 547, with relative weights from 0.8362 to 2.4817 depending on complications. Higher weights mean higher Medicare reimbursement.
Is M30.0 a CC or MCC?
CMS lists M30.0 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 74 closely related codes in its exclusion list.
What is the ICD-9 equivalent of M30.0?
Under the General Equivalence Mappings, polyarteritis nodosa converts to ICD-9-CM 446.0 (polyarteritis nodosa). The mapping is approximate, so confirm the match fits the documentation.
What HCC is M30.0?
M30.0 (polyarteritis nodosa) maps to CMS-HCC Category 94 (Systemic Lupus Erythematosus and Other Specified Systemic Connective Tissue Disorders), commonly written as HCC 94, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2026. It mapped to HCC 40 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 84.
Does M30.0 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, M30.0 adds a risk adjustment factor of about 0.268 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.196 to 0.297 depending on the payment segment). A more severe related category (HCC 93) supersedes it when both are reported. See the full factor table on the HCC 94 category page.
