Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David A. Trenkner, MD

Radiation Oncology Physician in Fort Wayne, IN · enumerated 2005.

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

National Provider Identifier

1730180563

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Registry record

Entity type Individual (Type 1)

Name David A. Trenkner

Credential MD

Sex Male

Practice address 11141 Parkview Plaza Dr Ste 110, Fort Wayne, IN, 46845

Phone (260) 266-9100

Fax (260) 266-9101

Enumeration date Aug 2, 2005

Last updated in NPPES Mar 11, 2013

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 01031940A (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
100321320	Medicaid	IN	-
103434971	Medicaid	MI	-
300039787	Other	IN	MEDICARE RAILROAD
000000614692	Other	IN	ANTHEM PIN
104239274	Medicaid	MI	-
0788081	Medicaid	OH	-

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

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.

What specialty is David Trenkner?

David Trenkner is registered in NPPES with the primary taxonomy of Radiation Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-03-11.