Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephen John Regan, MD

Internal Medicine Physician in Plymouth, NH · enumerated 2006.

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

National Provider Identifier

1336127000

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen John Regan

Credential MD

Sex Male

Practice address 101 Boulder Point Dr Ste 1, Plymouth, NH, 03264

Phone (603) 536-4000

Fax (603) 536-4001

Enumeration date Jan 4, 2006

Last updated in NPPES Jul 27, 2020

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 10663 (NH) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 10663 (NH) 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
30200408	Medicaid	NH	-
ORE5383	Medicaid	VT	-

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 Stephen Regan?

The National Provider Identifier (NPI) for Stephen Regan is 1336127000, a Type 1 (individual) record in the CMS NPPES registry.

Where does Stephen Regan practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-27.