Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Douglas Charles Mcadams, M.D.

Neurology Physician in Groton, CT · enumerated 2009.

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

National Provider Identifier

1134356298

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Registry record

Entity type Individual (Type 1)

Name Dr. Douglas Charles Mcadams

Credential M.D.

Sex Male

Practice address 1 Wahoo Ave, Groton, CT, 06349

Phone (860) 694-4123

Enumeration date Jun 16, 2009

Last updated in NPPES Aug 22, 2018

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 56899 (CT) Primary

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

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 Douglas Mcadams's NPI record?

Cross-check NPI 1134356298 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1134356298 active?

Yes, as of the latest NPPES snapshot, NPI 1134356298 is active (record last updated 2018-08-22).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-22.