Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Alan J Grenke, PA
Physician Assistant in Tucson, AZ · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1073522215
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Registry record
Entity type Individual (Type 1)
Name Mr. Alan J Grenke
Credential PA
Sex Male
Practice address 2800 E Ajo Way, Tucson, AZ, 85713
Phone (520) 874-4921
Enumeration date Aug 5, 2006
Last updated in NPPES Jul 31, 2009
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA-854 (ME) Primary
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 3748 (AZ) Secondary
PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program.
About the PA credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| Z121868 | Medicaid | AZ | - |
| 329420 | Other | AZ | STATE AHCCCS |
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.
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 Alan Grenke?
Alan Grenke is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-07-31.