Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. William James Rockwell, M.D.

Allergy Physician in Bridgeport, CT · enumerated 2005.

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

National Provider Identifier

1285630798

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Registry record

Entity type Individual (Type 1)

Name Dr. William James Rockwell

Credential M.D.

Sex Male

Practice address Bridgeport, CT, 06606

Phone (203) 374-6103

Fax (203) 374-1663

Enumeration date Jun 21, 2005

Last updated in NPPES Nov 21, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 017143 (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
1171438	Medicaid	CT	-
0V0522	Other	CT	HEALTH NET
01-0017143CT01	Other	CT	ANTHEM BLUE CROSS/BLUE SH
P381229	Other	CT	OXFORD

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 William Rockwell?

The National Provider Identifier (NPI) for William Rockwell is 1285630798, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Rockwell practice?

The practice location on file with NPPES is in Bridgeport, CT. 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 2014-11-21.