John S. Gilliam, MD
Family Medicine Physician · Mayer, AZ
John S. Gilliam, MD is a family medicine physician with a practice address in Mayer, Arizona, and NPI 1003877085, issued on Mar 30, 2006. Check the license (Arizona 41469, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- John S. Gilliam
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 41469 AZ
16226 OK
Self-reported in NPPES; status is on the state search - Practice location
- 20172 E Stagecoach Trl, Mayer, AZ 86333
- Phone
- (800) 288-6206
- Enumerated
- Mar 30, 2006
- Record last updated
- Jul 1, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (800) 960-4547
- Medicaid IDs
- 100044450B OK
100044450A OK - Medicare enrollment
- Enrolled (PECOS I20110509000734); accepts Medicare assignment
- Medical or professional school
- Oral Roberts University School Of Medicine, 1986
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 20172 E Stagecoach Trl
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cindy Brown, FNP-CFamily Nurse Practitioner1265693881
- Zachary Brown, MDFamily Medicine Physician1669094173
- Leanna Drake, FNP-CFamily Medicine Physician1861103871
- Meridith McElroy, APRN, FNP-CFamily Nurse Practitioner1659067999
Verify John S. Gilliam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 41469Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
42 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Oxycodone Hcl11 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: $200.34
1 payment: food and beverage; the largest payer was Medtronic, 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
- Carelock LLCPhoenix, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
4 family medicine physician records list a practice address in Mayer
They are 4 of the 22 NPPES records with a practice address in Mayer, and 3,119 family medicine physician records in Arizona.
All 4 in Mayer → All 3,119 in Arizona → Every provider in Mayer →
Other family medicine physician records in Arizona
- Muhammad Aamer, M.D.Yuma, AZ1437574720
- Ndidi Abara, M.D.Yuma, AZ1295115145
- Steven Abdelmalak, MDScottsdale, AZ1205092806
- Daniel Abelev, MDPhoenix, AZ1417573163
- Lindsey Abeyta, FNPTucson, AZ1043027857
- Modupeola Abiodun, M.D.Chandler, AZ1225326853
- Sara Abolmolouk, MDTucson, AZ1497043715
- Ahmed Abouzeid, MDGlendale, AZ1871619601
- Edward Abraham, M.D.Phoenix, AZ1144593211
- Rebecca Abraham, M.D.Surprise, AZ1437273323
Common questions
What is John S. Gilliam, MD's NPI number?
John S. Gilliam, MD's National Provider Identifier (NPI) is 1003877085, issued on Mar 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John S. Gilliam, MD located?
The NPPES record lists a practice address at 20172 E Stagecoach Trl, Mayer, AZ, 86333. Phone: (800) 288-6206. Providers update this record themselves, so call before visiting.
How can I verify John S. Gilliam, MD's license?
NPPES lists Arizona license number 41469, 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 John S. Gilliam, MD prescribe under Medicare Part D?
In 2024, John S. Gilliam, MD had 42 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is John S. Gilliam, MD'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.