WILLIAM F DUFF RPA-C
NPI 1780603456
Physician Assistant - Medical in Prescott, AZ
About William F Duff Rpa-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM F DUFF RPA-C (NPI 1780603456) is an individual medical provider in Prescott, Arizona, licensed in Arizona (7868) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1995).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
William F Duff Rpa-c is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is William Duff's NPI number?
The NPI number for William Duff is 1780603456. It was assigned to this individual provider in the NPPES registry on July 19, 2006.
Where is William Duff located?
William Duff practices at 2245 E State Route 69, Prescott, AZ 86301. The listed phone number is (833) 688-6247.
What is William Duff's specialty?
The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.
Is William Duff enrolled in Medicare?
Yes. William Duff is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does William Duff accept?
Health plans from UnitedHealthcare list William Duff as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for William Duff was last updated on February 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# William F Duff, RPA-C · NPI 1780603456
Medical physician in Prescott, Arizona. Individual provider, active in the CMS NPPES registry since July 19, 2006.
## Identity
- **NPI:** 1780603456 (Entity type: Individual)
- **Enumerated:** July 19, 2006
- **Primary specialty:** Physician Assistant - Medical · taxonomy 363AM0700X
- **State license:** 7868 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 2245 E STATE ROUTE 69, Prescott, AZ 86301-5674
- **Phone:** (833) 688-6247 · **Fax:** (833) 464-3775
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Other, class of 1995
## Record status
- **NPPES last updated:** February 26, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1780603456) · Data from the CMS NPPES public registry.