Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dag Holmsen, M.D.

Anesthesiology Physician in Waterville, ME · enumerated 2006.

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

National Provider Identifier

1003862046

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Registry record

Entity type Individual (Type 1)

Name Dag Holmsen

Credential M.D.

Sex Male

Practice address 149 North St, Waterville, ME, 04901

Phone (207) 622-1959

Enumeration date May 25, 2006

Last updated in NPPES Dec 18, 2013

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 014378 (ME) 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
G34673	Other	ME	HARVARD
284140099	Medicaid	ME	-
3119772	Other	ME	CIGNA
032517	Other	ME	ANTHEM
1041924	Other	ME	AETNA

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 Dag Holmsen's NPI record?

Cross-check NPI 1003862046 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1003862046 active?

Yes, as of the latest NPPES snapshot, NPI 1003862046 is active (record last updated 2013-12-18).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-12-18.