Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Frederick Ahmann, MD

Hematology & Oncology Physician in Tucson, AZ · enumerated 2006.

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

National Provider Identifier

1700857166

Verified

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Registry record

Entity type Individual (Type 1)

Name Frederick Ahmann

Credential MD

Sex Male

Practice address 3838 N Campbell Ave, Tucson, AZ, 85719

Phone (520) 694-2873

Enumeration date Feb 1, 2006

Last updated in NPPES Jul 9, 2010

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 10449 (AZ) 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
110072777	Other	AZ	RR MEDICARE
241589	Medicaid	AZ	-
ZWCGCR	Other	AZ	GROUP PIN

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.

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Frequently asked questions

How do I verify Frederick Ahmann's NPI record?

Cross-check NPI 1700857166 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1700857166 active?

Yes, as of the latest NPPES snapshot, NPI 1700857166 is active (record last updated 2010-07-09).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-09.