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

Alan David Kestenbaum, M.D.

Anesthesiology Physician in Waterbury, CT · enumerated 2006.

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

National Provider Identifier

1043223597

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Registry record

Entity type Individual (Type 1)

Name Alan David Kestenbaum

Credential M.D.

Sex Male

Practice address Waterbury, CT, 06708

Phone (203) 573-6000

Enumeration date Aug 15, 2006

Last updated in NPPES Oct 20, 2020

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

Taxonomy & licenses

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License 1678921 (NY) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 66608 (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

Where does Alan Kestenbaum practice?

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

What is the NPI number for Alan Kestenbaum?

The National Provider Identifier (NPI) for Alan Kestenbaum is 1043223597, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-20.