Allan Louis Markus, MD
Internal Medicine Physician · Chandler, AZ
Allan Louis Markus, MD is an internal medicine physician with a practice address in Chandler, Arizona, and NPI 1972595569, issued on Aug 19, 2005. Check the license (Arizona 29131, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Allan Louis Markus
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 29131 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1120 S Dobson RD Ste 225, Chandler, AZ 85286
- Phone
- (480) 728-5460
- Enumerated
- Aug 19, 2005
- Record last updated
- Jun 27, 2025
- Fax
- (480) 728-5461
- Medicare enrollment
- Enrolled (PECOS I20040405000344); accepts Medicare assignment
- Medical or professional school
- Rutgers New Jersey Medical School, 1990
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 1120 S Dobson RD Ste 225
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Allan Louis Markus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 29131Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average internal medicine physician in 2024
533 Medicare Part D claims for 47 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium43 claims
- Atorvastatin Calcium38 claims
- Losartan Potassium30 claims
- Amlodipine Besylate29 claims
- Albuterol Sulfate Hfa17 claims
- Hydrochlorothiazide15 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.
Bills Medicare through one group practice
- Sjhmc Physician ServicesPhoenix, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allan Louis Markus among 2,853 internal medicine physician records in Arizona
Allan Louis Markus, MD 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 fileYes · 58% of these records are
- Graduated1990 · median 2003 among the 1,643 with a school on file
- Record last updated2025 · 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).
93 internal medicine physician records list a practice address in Chandler
They are 93 of the 5,497 NPPES records with a practice address in Chandler, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Chandler → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Osaf Ahmed, MDChandler, AZ 852861396775680
- Kent Allen, MDChandler, AZ 852861750341137
- Amanda Bailey, D.O.Chandler, AZ 852861750837456
- Lynn CamargoChandler, AZ 852861093169534
- Hemasree Chaliki, MDChandler, AZ 852861356333454
- Shalini Chaliki, M.D.Chandler, AZ 852861659804433
- William Gaspar, MDChandler, AZ 852861497739015
- Megan Jhaver, M.D.Chandler, AZ 852861639115561
Common questions
What is Allan Louis Markus, MD's NPI number?
Allan Louis Markus, MD's National Provider Identifier (NPI) is 1972595569, issued on Aug 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Allan Louis Markus, MD located?
The NPPES record lists a practice address at 1120 S Dobson RD Ste 225, Chandler, AZ, 85286. Phone: (480) 728-5460. Providers update this record themselves, so call before visiting.
How can I verify Allan Louis Markus, MD's license?
NPPES lists Arizona license number 29131, 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 Allan Louis Markus, MD prescribe under Medicare Part D?
In 2024, Allan Louis Markus, MD had 533 Medicare Part D claims for 47 beneficiaries; 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.