Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Dumais, M.D.

Q: What is the NPI number for Mark Dumais?

The National Provider Identifier (NPI) for Mark Dumais is 1982690327, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in La Plata, MD · enumerated 2005.

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

National Provider Identifier

1982690327

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Dumais

Credential M.D.

Sex Male

Practice address 500 Charles St, La Plata, MD, 20646

Phone (301) 609-4857

Fax (301) 609-4105

Enumeration date Sep 21, 2005

Last updated in NPPES Jun 4, 2012

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License D0053813 (MD) Primary

2083P0011X Undersea and Hyperbaric Medicine (Preventive Medicine) Physician Allopathic & Osteopathic Physicians · License D0053813 (MD) Secondary

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
135400100	Medicaid	MD	-
60644802	Other	-	BCBS MARYLAND
S3990056	Other	-	BCBS DC
145724700	Other	-	DEPARTMENT OF LABOR
5092523	Other	-	AETNA PPO
6052423	Other	-	AETNA HMO

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

Where does Mark Dumais practice?

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

What is the NPI number for Mark Dumais?

The National Provider Identifier (NPI) for Mark Dumais is 1982690327, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-06-04.