Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen F Dierdorf, MD

Pediatric Anesthesiology Physician in Indianapolis, IN · enumerated 2006.

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

National Provider Identifier

1285742213

Verified

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Registry record

Entity type Individual (Type 1)

Name Stephen F Dierdorf

Credential MD

Sex Male

Practice address 1120 South Dr, Fesler Hall Rm 204, Indianapolis, IN, 46202

Phone (317) 274-0273

Fax (317) 274-0256

Enumeration date Aug 29, 2006

Last updated in NPPES Dec 4, 2009

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 01024461A (IN) Secondary

207LP3000X Pediatric Anesthesiology Physician Allopathic & Osteopathic Physicians · License 01024461A (IN) 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
100324750	Medicaid	IN	-

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 Stephen Dierdorf practice?

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

What is the NPI number for Stephen Dierdorf?

The National Provider Identifier (NPI) for Stephen Dierdorf is 1285742213, 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 2009-12-04.