Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Charles O'Brien, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Muskegon, MI · enumerated 2006 · practices at West Shore Cardiology, Plc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1700830478

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Registry record

Entity type Individual (Type 1)

Name Charles O'Brien

Credential MD

Sex Male

Practice address 1212 E Sherman Blvd, Muskegon, MI, 49444

Phone (231) 727-5211

Fax (231) 727-4571

Enumeration date May 19, 2006

Last updated in NPPES Aug 16, 2012

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 4301033444 (MI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
N94150004	Other	MI	MEDICARE
4531639	Medicaid	MI	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify Charles O'Brien's NPI record?

Cross-check NPI 1700830478 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1700830478 active?

Yes, as of the latest NPPES snapshot, NPI 1700830478 is active (record last updated 2012-08-16).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-08-16.