Dr. John Ramsey Warfield, MD
- Medicare services, 2024
- 725
- Medicare patients, 2024
- 444
- Part D claims, 2024
- 55
- Hospital affiliations
- 3
- Medical group
- 1
- Practice address
- 4212 North 16th Street, Phoenix, AZ 85016
- Practice phone
- Call (602) 263-1200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. John Ramsey Warfield is a diagnostic radiologist in Phoenix, Arizona
Dr. Warfield practices at Phoenix Indian Medical Center in Phoenix, Arizona, part of U.S. Department of Health and Human Services.
Dr. Warfield's NPI, 1225118151, was assigned on October 16, 2006. Dr. Warfield graduated from University of Maryland School of Medicine in 1972. Dr. Warfield holds Pennsylvania license MD044853E.
- NPI
- 1225118151NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042345647
- NPI enumeration date
- October 16, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (602) 263-1200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 80
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Ramsey Warfield practices at Phoenix Indian Medical Center in Phoenix, Arizona
Dr. Warfield's primary practice is Phoenix Indian Medical Center, at 4212 North 16th Street, Phoenix, AZ 85016 in Maricopa County. The practice phone is (602) 263-1200.
- Phoenix Indian Medical Center4212 North 16th Street, Phoenix, AZ 85016 · Maricopa CountyPhone(602) 263-1200
Source: Dmand AI Affiliation Data
Dr. John Ramsey Warfield is affiliated with 3 sites of care and 1 medical group
Dr. Warfield's primary practice is Phoenix Indian Medical Center in Phoenix, Arizona, part of U.S. Department of Health and Human Services. Dr. Warfield is also affiliated with Abrazo Central Campus. The medical group on file is Phoenix Indian Medical Center. Dmand AI also links Dr. Warfield to 1 more hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Ramsey Warfield's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Warfield practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Phoenix Indian Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Ramsey Warfield is one of 800 diagnostic radiologists in Arizona
Diagnostic radiology is Dr. Warfield's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Warfield is licensed in Pennsylvania.
Specialties and state licenses
- Diagnostic radiology, PennsylvaniaPrimary
Diagnostic radiologists near Dr. Warfield
Counts of diagnostic radiologists 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. John Ramsey Warfield billed Medicare for 725 services in 2024
CMS data shows 725 Medicare services from Dr. Warfield across 18 procedure codes in 2024, for 444 Medicare patients. Medicare paid $14,798 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Warfield's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 2972024: 691133%
- Other services
- 2023: 02024: 34
Dr. Warfield compared with the Arizona median for diagnostic radiologists, 2024
- Dr. Warfield
- Arizona median
- Medicare services
- 725vs 3,60580% below
- Medicare patients
- 444vs 1,57472% below
- Part D claims
- 40vs 172.4 times
Medians across 735 diagnostic radiologists in Arizona with Dmand AI profiles that report each measure.
Dr. Warfield'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. Warfield and other diagnostic radiologists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Ramsey Warfield treated 444 Medicare patients in 2024, average age 70
CMS counts 444 Medicare patients who saw Dr. Warfield in 2024. The largest group is 65 to 74, with 239 patients. 75% of them have high blood pressure, and 62% have diabetes. 46% are also on Medicaid. Their average risk score is 1.41, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Warfield's median patient age at 59, with 79% women.
Dr. Warfield's Medicare patients by age, 2024
Dr. Warfield's Medicare patients by sex, 2024
- Women33375%
- Men11125%
Chronic conditions among Dr. Warfield's Medicare patients, 2024
- High blood pressure75%
- Diabetes62%
- High cholesterol58%
- Arthritis48%
- Chronic kidney disease32%
- Ischemic heart disease19%
- Mood disorders17%
- Asthma16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Warfield's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women79%
- Men19%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Ramsey Warfield wrote 55 Medicare Part D claims in 2024
In 2024, Dr. Warfield wrote 55 Medicare Part D claims. 47% of them were for generic drugs. CMS names the drug for 40 of them, across 3 drugs with 11 or more claims each, at $23,039 in total drug cost. In 2023, CMS named 23 claims across 2 drugs.
Dr. Warfield's Part D claims by kind of drug, 2024
- Generic26 claims47%
- Brand-name29 claims53%
Dr. Warfield'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 232024: 4074%
Drugs named by CMS: 3 in 2024, 2 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
How Dr. John Ramsey Warfield takes part in Medicare
Dr. Warfield accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John Ramsey Warfield graduated from University of Maryland School of Medicine
Dr. Warfield graduated from University of Maryland School of Medicine in 1972.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Ramsey Warfield'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) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. John Ramsey Warfield
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. John Ramsey Warfield's NPI number?
Dr. John Ramsey Warfield's NPI number is 1225118151. It was assigned on October 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Ramsey Warfield?
Dr. John Ramsey Warfield is a diagnostic radiologist in Phoenix, Arizona. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. John Ramsey Warfield practice?
Dr. Warfield practices at 4212 North 16th Street, Phoenix, AZ 85016. Dr. Warfield's primary practice is Phoenix Indian Medical Center in Phoenix, Arizona, part of U.S. Department of Health and Human Services. Dmand AI also links Dr. Warfield to 1 hospital.
What is Dr. John Ramsey Warfield's office phone number?
The practice phone on file for Dr. Warfield is (602) 263-1200.
What is Dr. John Ramsey Warfield's medical license number?
Dr. Warfield holds Pennsylvania license MD044853E.
Which hospitals is Dr. John Ramsey Warfield affiliated with?
Dr. Warfield practices at Phoenix Indian Medical Center in Phoenix, Arizona. Dr. Warfield is also affiliated with Abrazo Central Campus. Dmand AI links Dr. Warfield to 1 more hospital.
What medical group is Dr. John Ramsey Warfield part of?
Dr. Warfield is linked to Phoenix Indian Medical Center.
Does Dr. John Ramsey Warfield accept Medicare?
Yes. CMS data shows Dr. Warfield billed Medicare for 725 services in 2024, and Dr. Warfield accepts Medicare assignment.
How many Medicare patients does Dr. John Ramsey Warfield see?
CMS counts 444 Medicare patients who saw Dr. Warfield in 2024, with an average age of 70.
What services does Dr. John Ramsey Warfield bill to Medicare?
In 2024, Dr. Warfield's most billed Medicare services were radiation oncology (77063), radiation oncology (77067) and diagnostic imaging (71046).
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Where did Dr. John Ramsey Warfield go to medical school?
Dr. Warfield graduated from University of Maryland School of Medicine in 1972.
What drugs does Dr. John Ramsey Warfield prescribe most?
In 2024 Medicare Part D data, Dr. Warfield's most prescribed drugs by claims were Mounjaro, Ezetimibe and Eliquis.
How long has Dr. John Ramsey Warfield been practicing?
Dr. Warfield graduated from medical school in 1972, 54 years ago.
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