Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. David R Gruen, MD

Q: What is the NPI number for David Gruen?

The National Provider Identifier (NPI) for David Gruen is 1215901327, a Type 1 (individual) record in the CMS NPPES registry.

Diagnostic Radiology Physician in Stamford, CT · enumerated 2006.

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

National Provider Identifier

1215901327

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Registry record

Entity type Individual (Type 1)

Name Dr. David R Gruen

Credential MD

Sex Male

Practice address 32 Strawberry Hill Ct, 2nd Floor Women'S Center, Stamford, CT, 06902

Phone (203) 276-4152

Enumeration date Feb 15, 2006

Last updated in NPPES Oct 15, 2019

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 036693 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does David Gruen practice?

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

What is the NPI number for David Gruen?

The National Provider Identifier (NPI) for David Gruen is 1215901327, 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 2019-10-15.