Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Bill David Dienstag, PAC
Physician Assistant in Elmira, NY · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1104120575
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Registry record
Entity type Individual (Type 1)
Name Mr. Bill David Dienstag
Credential PAC
Sex Male
Practice address 600 Ivy St, Suite 201, Elmira, NY, 14905
Phone (607) 737-7780
Fax (607) 737-7788
Enumeration date Dec 29, 2010
Last updated in NPPES Mar 7, 2023
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 006144 (NY) Primary
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 006144 | Other | NY | NY STATE LICENSE |
| 04297325 | Medicaid | NY | - |
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 Bill Dienstag?
Bill Dienstag 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 2023-03-07.