Warren C. Johnson, M.D., PH.D.
Family Medicine Physician · Phoenix, AZ
Warren C. Johnson, M.D., PH.D. is a family medicine physician with a practice address in Phoenix, Arizona, and NPI 1134168925, issued on Jun 6, 2006. Check the license (Arizona 23569, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Warren C. Johnson
- Credential
- M.D., PH.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 23569 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 11209 N Tatum Blvd, Phoenix, AZ 85028
- Phone
- (602) 494-5155
- Enumerated
- Jun 6, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (602) 494-5115
- Medicare enrollment
- Enrolled (PECOS I20040803000661); accepts Medicare assignment
- Medical or professional school
- University Of Arizona College Of Medicine, 1994
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,119 in Arizona → Look up another NPI →
Also registered at 11209 N Tatum Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Warren C. Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 23569Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.1 times the Medicare Part D claims of the average family medicine physician in 2024
14,399 Medicare Part D claims for 1,149 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 999 claims were for opioids.
Most prescribed
- Levothyroxine Sodium755 claims
- Atorvastatin Calcium605 claims
- Lisinopril513 claims
- Amlodipine Besylate432 claims
- Alprazolam304 claims
- Losartan Potassium290 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,597.48
157 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Paradise Valley Family Medicine, PCPhoenix, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Warren C. Johnson among 3,119 family medicine physician records in Arizona
Warren C. Johnson, M.D., PH.D. is one of 3,119 family medicine physician records with a practice address in Arizona. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1994 · median 2006 among the 1,775 with a school on file
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
649 family medicine physician records list a practice address in Phoenix
They are 649 of the 31,399 NPPES records with a practice address in Phoenix, and 3,119 family medicine physician records in Arizona.
All 3,119 in Arizona → Every provider in Phoenix → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Thomas Bauch, M.D.Phoenix, AZ 850281124011713
- Mayy Deadrick, M.D.Phoenix, AZ 850281194741074
- Susan Del Sordi-Staats, D.O.Phoenix, AZ 850281902096092
- Eli Hammer, M.D.Phoenix, AZ 850281801097837
- Clarissa Johnston, DOPhoenix, AZ 850281851371579
- Anthony Katz, M.D.Phoenix, AZ 850281104865922
- Catherine Lacourt, M.D.Phoenix, AZ 850281942232988
- Shayna Mansfield, D.O.Phoenix, AZ 850281780687087
Common questions
What is Warren C. Johnson, M.D., PH.D.'s NPI number?
Warren C. Johnson, M.D., PH.D.'s National Provider Identifier (NPI) is 1134168925, issued on Jun 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Warren C. Johnson, M.D., PH.D. located?
The NPPES record lists a practice address at 11209 N Tatum Blvd, Phoenix, AZ, 85028. Phone: (602) 494-5155. Providers update this record themselves, so call before visiting.
How can I verify Warren C. Johnson, M.D., PH.D.'s license?
NPPES lists Arizona license number 23569, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Warren C. Johnson, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Warren C. Johnson, M.D., PH.D. had 14,399 Medicare Part D claims for 1,149 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Warren C. Johnson, M.D., PH.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.