Mark Carlton Brown, M.D.
Internal Medicine Physician · Sun City, AZ
Mark Carlton Brown, M.D. is an internal medicine physician with a practice address in Sun City, Arizona, and NPI 1225021264, issued on Aug 24, 2005. Check the license (Arizona 19655, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Carlton Brown
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 19655 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 14678 N Del Webb Blvd, Sun City, AZ 85351
- Phone
- (623) 933-8289
- Enumerated
- Aug 24, 2005
- Record last updated
- Sep 9, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (623) 933-2596
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 14678 N Del Webb Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Krista Brancel, FNP, NP-C, MSN, BSNFamily Nurse Practitioner1548825656
- Christopher Huber, FNP-CFamily Nurse Practitioner1124551965
- Michael Johnson, M.D.Internal Medicine Physician1609869643
- Ron Loomis, APRN FNP-BCFamily Nurse Practitioner1740054469
- Thomas Maxwell, M.D.Internal Medicine Physician1396738324
- Cynthia Medina, D.O.Family Medicine Physician1710064183
Verify Mark Carlton Brown in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 19655Check 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 internal medicine physician in 2024
20 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Mark Carlton Brown among 2,853 internal medicine physician records in Arizona
Mark Carlton Brown, M.D. is one of 2,853 internal 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2016 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
53 internal medicine physician records list a practice address in Sun City
They are 53 of the 813 NPPES records with a practice address in Sun City, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Sun City → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ramanjit Dhaliwal, MDSun City, AZ 853511689669095
- Trinh Doan, MDSun City, AZ 853511518966878
- Michael Johnson, M.D.Sun City, AZ 853511609869643
- Manoj Makhija, M.D.Sun City, AZ 853511588657365
- Thomas Maxwell, M.D.Sun City, AZ 853511396738324
- Cristina Murgiuc, MDSun City, AZ 853511154314946
- Srinivasa Palnati, MDSun City, AZ 853511881688992
- Shantilal Patel, M.D.Sun City, AZ 853511316941248
Common questions
What is Mark Carlton Brown, M.D.'s NPI number?
Mark Carlton Brown, M.D.'s National Provider Identifier (NPI) is 1225021264, issued on Aug 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Carlton Brown, M.D. located?
The NPPES record lists a practice address at 14678 N Del Webb Blvd, Sun City, AZ, 85351. Phone: (623) 933-8289. Providers update this record themselves, so call before visiting.
How can I verify Mark Carlton Brown, M.D.'s license?
NPPES lists Arizona license number 19655, 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 Mark Carlton Brown, M.D. prescribe under Medicare Part D?
In 2024, Mark Carlton Brown, M.D. had 20 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.