Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alan M Nelson, M.D.

Q: What is the NPI number for Alan Nelson?

The National Provider Identifier (NPI) for Alan Nelson is 1720006117, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in Bridgeport, CT · enumerated 2006 · practices at Fairfield County Internal Medicine and Gastroenterology Associates PC.

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

National Provider Identifier

1720006117

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Registry record

Entity type Individual (Type 1)

Name Alan M Nelson

Credential M.D.

Sex Male

Practice address 4641 Main St Ste 1, Bridgeport, CT, 06606

Phone (203) 374-4966

Fax (203) 371-7024

Enumeration date Jul 17, 2006

Last updated in NPPES Dec 6, 2022

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 019537 (CT) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 019537 (CT) 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
001195379	Medicaid	CT	-

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 Alan Nelson practice?

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

What is the NPI number for Alan Nelson?

The National Provider Identifier (NPI) for Alan Nelson is 1720006117, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Fairfield County Internal Medicine and Gastroenterology Associates PC Specialist · Bridgeport, CT NPI 1003849423 Richard Link Specialist · Bridgeport, CT NPI 1750314712

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-06.