NPI Portal NPI Lookup & Verification

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Dr. R Christopher Dillon, M.D.

Diagnostic Radiology Physician in Tucson, AZ · enumerated 2008 · practices at Arizona Community Physicians PC.

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

National Provider Identifier

1295913473

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Registry record

Entity type Individual (Type 1)
Name Dr. R Christopher Dillon
Credential M.D.
Sex Male
Practice address 2191 W Orange Grove Rd, Tucson, AZ, 85741
Phone (520) 547-3940
Enumeration date Feb 10, 2008
Last updated in NPPES Jun 24, 2026

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 42411 (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
616680 Medicaid AZ -

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

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 R Christopher Dillon?
R Christopher Dillon is registered in NPPES with the primary taxonomy of Diagnostic Radiology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-24.