Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Douglas Lawrence Marsh, D.O.

Addiction Medicine (Family Medicine) Physician in Melvindale, MI · enumerated 2006.

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

National Provider Identifier

1790745966

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Douglas Lawrence Marsh

Credential D.O.

Sex Male

Practice address Melvindale, MI, 48122

Phone (313) 928-5000

Fax (313) 928-2215

Enumeration date Mar 23, 2006

Last updated in NPPES Mar 7, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207QA0401X Addiction Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 5101007923 (MI) Primary

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
5101007923	Other	MI	STATE LICENSE

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Douglas Marsh?

The National Provider Identifier (NPI) for Douglas Marsh is 1790745966, a Type 1 (individual) record in the CMS NPPES registry.

Where does Douglas Marsh practice?

The practice location on file with NPPES is in Melvindale, MI. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.