Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark D. Baldwin, DO

Internal Medicine Physician in Mount Vernon, WA · enumerated 2006.

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

National Provider Identifier

1477656304

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Registry record

Entity type Individual (Type 1)

Name Mark D. Baldwin

Credential DO

Sex Male

Practice address 819 South 13th Street, Mount Vernon, WA, 98273

Phone (360) 814-6230

Fax (360) 814-6240

Enumeration date Sep 6, 2006

Last updated in NPPES Jan 4, 2016

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 34-00-5880-B (OH) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License OP60600878 (WA) Primary

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License OP60600878 (WA) Secondary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
0059120	Medicaid	OH	-
0947195	Medicaid	OH	-

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 Mark Baldwin's NPI record?

Cross-check NPI 1477656304 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1477656304 active?

Yes, as of the latest NPPES snapshot, NPI 1477656304 is active (record last updated 2016-01-04).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-04.