NPI Portal NPI Lookup & Verification

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

Dr. Sheldon Burt Greenberg, M.D.

Plastic Surgery within the Head & Neck (Otolaryngology) Physician in Norwalk, CT · enumerated 2006.

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

National Provider Identifier

1124115662

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Registry record

Entity type Individual (Type 1)
Name Dr. Sheldon Burt Greenberg
Credential M.D.
Sex Male
Practice address Norwalk, CT, 06851
Phone (203) 845-2244
Fax (203) 845-2249
Enumeration date Oct 6, 2006
Last updated in NPPES Sep 15, 2010

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

Taxonomy & licenses

207YX0007X Plastic Surgery within the Head & Neck (Otolaryngology) Physician Allopathic & Osteopathic Physicians · License 022559 (CT) Primary
208200000X Plastic Surgery Physician Allopathic & Osteopathic Physicians · License 022559 (CT) Secondary
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
00125598 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.

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Frequently asked questions

What specialty is Sheldon Greenberg?
Sheldon Greenberg is registered in NPPES with the primary taxonomy of Plastic Surgery within the Head & Neck (Otolaryngology) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-09-15.