Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Steven A Feinstein, MD

Internal Medicine Physician in Radnor, PA · enumerated 2005.

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

National Provider Identifier

1104815356

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Steven A Feinstein

Credential MD

Sex Male

Practice address 250 King of Prussia Road, Radnor, PA, 19087

Phone (610) 902-5600

Enumeration date Oct 20, 2005

Last updated in NPPES Aug 21, 2015

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD032211E (PA) Primary

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
19912	Other	PA	AETNA
141152	Other	PA	BLUE SHIELD
0018105330002	Medicaid	PA	-
1279096007	Other	PA	CIGNA
0054390000	Other	PA	KEYSTONE HEALTH PLAN EAST
1004567	Other	PA	KMHP

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 Steven Feinstein?

Steven Feinstein is registered in NPPES with the primary taxonomy of Internal Medicine 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.

Other providers at this practice address

Browse all →

Allison Oler Internal Medicine Physician · Radnor, PA NPI 1710934740 Carol Fleischman Internal Medicine Physician · Radnor, PA NPI 1902846942 Preethi Thomas Rheumatology Physician · Radnor, PA NPI 1811937857 Susan Brozena Advanced Heart Failure and Transplant Cardiology Physician · Radnor, PA NPI 1881621787 Michelle Vichnin Obstetrics & Gynecology Physician · Radnor, PA NPI 1063440519 Catherine Quirk Dermatology Physician · Radnor, PA NPI 1770595704 Edward Carter Diagnostic Radiology Physician · St. David, PA NPI 1952413932 Erika Tapino Endocrinology, Diabetes & Metabolism Physician · Radnor, PA NPI 1295811958

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-08-21.