Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Allen P Schlein, MD

Orthopaedic Surgery Physician in Bridgeport, CT · enumerated 2006.

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

National Provider Identifier

1316046428

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Allen P Schlein

Credential MD

Sex Male

Practice address 650 Clinten Avenue, Bridgeport, CT, 06605

Phone (203) 336-3526

Fax (203) 335-2968

Enumeration date Sep 22, 2006

Last updated in NPPES Jul 25, 2012

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License A15261 (CT) Primary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 18255 (CA) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 1148631 (NY) 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
001152610	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

What specialty is Allen Schlein?

Allen Schlein is registered in NPPES with the primary taxonomy of Orthopaedic Surgery 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-25.