NPI registry status
Active
2026 NPPES data Geriatric Medicine (Family Medicine) Physician NPI 1801089255 NP
Verify on CMS → Robert Duff, NP
Geriatric Medicine (Family Medicine) Physician in Sierra Vista, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,792 in Geriatric Medicine (Family Medicine) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
What the federal data shows
Robert Duff, NP is a Geriatric Medicine (Family Medicine) Physician in Sierra Vista, Arizona, listed in the federal CMS National Provider Identifier registry.
- #191
- Geriatric Medicine (Family Medicine) Physician rank among Arizona specialties
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Robert Duff, NP
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1801089255), first enumerated 08/20/2007.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Duff with other Geriatric Medicine (Family Medicine) Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Arizona
- Dr. Aimee Baek, M.D. Phoenix, AZ
- Dr. Carlton Baker, MD Sahuartia, AZ
- Dr. Cynthia Barry, D.O. Gilbert, AZ
- Dr. Marc Bauder, M.D. Prescott, AZ
- Dr. Jessica Berdeja, MD Phoenix, AZ
- Dr. Nalini Bhalla, M.D. Phoenix, AZ
Other specialties in Sierra Vista: Pharmacist (42) · Family Nurse Practitioner (41) · Internal Medicine Physician (39) · Student in an Organized Health Care Education/Training Program (37)
CMS NPPES provider registry desk
NPI 1801089255 · Geriatric Medicine (Family Medicine) Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1801089255
- ENUM-MID 2007
- TAX-NARROW 1,792
- RX-NONE No Part D
- BOOK-THIN 38 in Arizona
- PHOTO-ENUM Syed Hasan, MD · 2007
◑
Board-eligible specialty (heuristic, not verified)
Robert Duff, NP practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Robert Duff, NP?
Quality data not reportedPrimary specialty
Geriatric Medicine (Family Medicine) Physician
Specialty distribution in Arizona
How Geriatric Medicine (Family Medicine) Physician compares to other specialties among Arizona providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Geriatric Medicine (Family Medicine) Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1801089255 |
|---|---|
| Specialty | Geriatric Medicine (Family Medicine) Physician |
| Credentials | NP |
| Gender | Male |
| NPI Issued | 08/20/2007 |
More Geriatric Medicine (Family Medicine) Physician in AZ →
All providers in Arizona →
Compare specialties →
Geriatric Medicine (Family Medicine) Physician Overview
How Robert Duff, NP fits within the Geriatric Medicine (Family Medicine) Physician landscape nationally.
1,792
Geriatric Medicine (Family Medicine) Physician Providers in US
52
States with Geriatric Medicine (Family Medicine) Physician
4,917
Avg Claims per Provider
Nationwide Geriatric Medicine (Family Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Duff, both outside Arizona so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Geriatric Medicine (Family Medicine) Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Duff.
One of 38 Geriatric Medicine (Family Medicine) Physician providers enrolled in Arizona, 11 are shown on this page.
Dr. Douglas Cunningham
D.O.
Phoenix, AZ
Dr. Thomas Cuomo Jr
MD
Phoenix, AZ
Dr. Rikesh Desai
MD
Surprise, AZ
Dr. Mila Easapour Cheshani
M.D.
Scottsdale, AZ
Dr. Carmelo Echeverria
MD
Nogales, AZ
Compare Geriatric Medicine (Family Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Robert Duff, NP's specialty? ▼
Robert Duff, NP specializes in Geriatric Medicine (Family Medicine) Physician and practices in Sierra Vista, Arizona. Credentials: NP.
Where is Robert Duff, NP located? ▼
Robert Duff, NP is located at 157 N CORONADO DR, Sierra Vista, AZ, 85635. Phone: (520) 629-4802.
What is Robert Duff, NP's NPI number? ▼
Robert Duff, NP's National Provider Identifier (NPI) is 1801089255, issued on 08/20/2007.
How many Geriatric Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 1,792 Geriatric Medicine (Family Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Family Medicine) Physician provider writes 4,917 Medicare Part D claims per year.
Does Robert Duff, NP accept Medicare? ▼
Robert Duff, NP appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Duff, NP's credentials? ▼
Robert Duff, NP's NPI is 1801089255 with credentials NP. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.