Dr. Nathan Rex Duffin, DO
- Medicare services, 2024
- 523
- Medicare patients, 2024
- 184
- Part D claims, 2024
- 800
- MIPS score, 2024
- 89
- Hospital affiliations
- 2
- Practice address
- 1301 South Crismon Road, Mesa, AZ 85209
- Practice phone
- Call (480) 358-6100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Duffin's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Nathan Rex Duffin is an internist in Mesa, Arizona
Dr. Duffin practices at HonorHealth Four Peaks Medical Center in Mesa, Arizona, part of HonorHealth.
Dr. Duffin's NPI, 1497016190, was assigned on May 30, 2012. Dr. Duffin holds Arizona license 006636.
- NPI
- 1497016190NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8921329814
- NPI enumeration date
- May 30, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (480) 358-6100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nathan Rex Duffin practices at HonorHealth Four Peaks Medical Center in Mesa, Arizona
Dr. Duffin's primary practice is HonorHealth Four Peaks Medical Center, at 1301 South Crismon Road, Mesa, AZ 85209 in Maricopa County. The practice phone is (480) 358-6100.
- HonorHealth Four Peaks Medical Center1301 South Crismon Road, Mesa, AZ 85209 · Maricopa CountyPhone(480) 358-6100
Source: Dmand AI Affiliation Data
Dr. Nathan Rex Duffin is affiliated with 3 sites of care and 5 medical groups
Dr. Duffin's primary practice is HonorHealth Four Peaks Medical Center in Mesa, Arizona, part of HonorHealth. Dr. Duffin is also affiliated with HonorHealth Scottsdale Osborn Medical Center. The medical group on file is City of Hope. Dmand AI also links Dr. Duffin to 4 more medical groups and 1 hospice, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nathan Rex Duffin's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duffin practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| HonorHealth Four Peaks Medical Center | Available with a free account |
| +2 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nathan Rex Duffin is one of 2,420 internists in Arizona
Internal medicine is Dr. Duffin's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Duffin is licensed in Arizona.
Specialties and state licenses
- Internal medicine, ArizonaPrimary
Internists near Dr. Duffin
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Nathan Rex Duffin billed Medicare for 523 services in 2024
CMS data shows 523 Medicare services from Dr. Duffin across 4 procedure codes in 2024, for 184 Medicare patients. Medicare paid $46,355 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Duffin's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6772024: 52323%
Dr. Duffin compared with the Arizona median for internists, 2024
- Dr. Duffin
- Arizona median
- Medicare services
- 523vs 47610% above
- Medicare patients
- 184vs 20510% below
- Part D claims
- 477vs 26083% above
Medians across 2,300 internists in Arizona with Dmand AI profiles that report each measure.
Dr. Duffin's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Duffin and other internists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nathan Rex Duffin treated 184 Medicare patients in 2024, average age 77
CMS counts 184 Medicare patients who saw Dr. Duffin in 2024. The largest group is 75 to 84, with 80 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 10% are also on Medicaid. Their average risk score is 2.05, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Duffin's median patient age at 73, with 50% women.
Dr. Duffin's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Duffin's Medicare patients by sex, 2024
- Women9451%
- Men9049%
Chronic conditions among Dr. Duffin's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis48%
- Heart failure46%
- Ischemic heart disease46%
- Atrial fibrillation45%
- Chronic kidney disease45%
- Diabetes37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Duffin's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nathan Rex Duffin wrote 800 Medicare Part D claims in 2024
In 2024, Dr. Duffin wrote 800 Medicare Part D claims for 93 patients. 95% of them were for generic drugs. CMS names the drug for 477 of them, across 23 drugs with 11 or more claims each, at $19,239 in total drug cost. In 2023, CMS named 273 claims across 16 drugs.
Dr. Duffin's Part D claims by kind of drug, 2024
- Generic756 claims95%
- Brand-name and other44 claims6%
Dr. Duffin's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Duffin's Part D claims, 2024
- Antibiotics2%17 of 800 claims
- Antipsychotics, patients 65 and over2%16 of 800 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2732024: 47775%
Drugs named by CMS: 23 in 2024, 16 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Nathan Rex Duffin scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Duffin for performance year 2024, reported as part of a group. Dr. Duffin accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Duffin's MIPS scores, performance year 2024
- 89of 100Final score
- 63.7of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 90of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Nathan Rex Duffin received $591 in industry payments from 2017 to 2024
CMS Open Payments shows 13 general payments to Dr. Duffin from 9 drug and device companies from 2017 to 2024. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $136.
General payments to Dr. Duffin by program year, 2017 to 2024
Companies that paid Dr. Duffin the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Nathan Rex Duffin's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Nathan Rex Duffin
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Nathan Rex Duffin's NPI number?
Dr. Nathan Rex Duffin's NPI number is 1497016190. It was assigned on May 30, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Nathan Rex Duffin?
Dr. Nathan Rex Duffin is an internist in Mesa, Arizona. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Nathan Rex Duffin practice?
Dr. Duffin practices at 1301 South Crismon Road, Mesa, AZ 85209. Dr. Duffin's primary practice is HonorHealth Four Peaks Medical Center in Mesa, Arizona, part of HonorHealth. Dmand AI also links Dr. Duffin to 4 medical groups and 1 hospice.
What is Dr. Nathan Rex Duffin's office phone number?
The practice phone on file for Dr. Duffin is (480) 358-6100.
What is Dr. Nathan Rex Duffin's medical license number?
Dr. Duffin holds Arizona license 006636.
Which hospitals is Dr. Nathan Rex Duffin affiliated with?
Dr. Duffin practices at HonorHealth Four Peaks Medical Center in Mesa, Arizona. Dr. Duffin is also affiliated with HonorHealth Scottsdale Osborn Medical Center.
What medical group is Dr. Nathan Rex Duffin part of?
Dr. Duffin is linked to City of Hope. Dmand AI links Dr. Duffin to 4 more medical groups.
Does Dr. Nathan Rex Duffin accept Medicare?
Yes. CMS data shows Dr. Duffin billed Medicare for 523 services in 2024, and Dr. Duffin accepts Medicare assignment.
What is Dr. Nathan Rex Duffin's MIPS score?
Dr. Duffin's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.
How many Medicare patients does Dr. Nathan Rex Duffin see?
CMS counts 184 Medicare patients who saw Dr. Duffin in 2024, with an average age of 77.
Show 4 more questionsShow fewer questions
What services does Dr. Nathan Rex Duffin bill to Medicare?
In 2024, Dr. Duffin's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99223).
What drugs does Dr. Nathan Rex Duffin prescribe most?
In 2024 Medicare Part D data, Dr. Duffin's most prescribed drugs by claims were Atorvastatin Calcium, Tamsulosin HCl and Lisinopril.
Has Dr. Nathan Rex Duffin received payments from drug or device companies?
CMS Open Payments shows $591 in general payments to Dr. Duffin from 9 companies from 2017 to 2024. The largest total came from Abbott Laboratories.
How long has Dr. Nathan Rex Duffin been practicing?
Dr. Duffin graduated from medical school in 2006, 20 years ago.
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