Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert J Stiller, M.D.

Obstetrics & Gynecology Physician in Bridgeport, CT · enumerated 2006.

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

National Provider Identifier

1801855804

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Registry record

Entity type Individual (Type 1)

Name Robert J Stiller

Credential M.D.

Sex Male

Practice address 226 Mill Hill Ave, 3rd Floor, Bridgeport, CT, 06610

Phone (203) 384-3873

Fax (203) 384-3829

Enumeration date Mar 20, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 023875 (CT) Primary

207VM0101X Maternal & Fetal Medicine Physician Allopathic & Osteopathic Physicians · License 023875 (CT) Secondary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Robert Stiller?

The National Provider Identifier (NPI) for Robert Stiller is 1801855804, a Type 1 (individual) record in the CMS NPPES registry.

Where does Robert Stiller practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.