Mark Phillips Siegel, D.O.
Family Medicine Physician · Phoenix, AZ
Mark Phillips Siegel, D.O. is a family medicine physician with a practice address in Phoenix, Arizona, and NPI 1487690046, issued on Jun 21, 2006. Check the license (Arizona 2479, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Phillips Siegel
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 2479 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1820 W Maryland Ave, Phoenix, AZ 85015
- Phone
- (602) 242-4100
- Enumerated
- Jun 21, 2006
- Record last updated
- Mar 22, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (602) 242-7965
- Medicare enrollment
- Enrolled (PECOS I20051102000336); accepts Medicare assignment
- Medical or professional school
- College Of Osteo Med Of The Pacific At Pomona, 1987
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,119 in Arizona → Look up another NPI →
Also registered at 1820 W Maryland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Neal Galen, D.O.Surgery Physician1073848636
Verify Mark Phillips Siegel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 2479Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average family medicine physician in 2024
2,055 Medicare Part D claims for 192 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 93 claims were for opioids.
Most prescribed
- Lisinopril121 claims
- Prednisone77 claims
- Levothyroxine Sodium70 claims
- Amlodipine Besylate62 claims
- Atorvastatin Calcium60 claims
- Tramadol Hcl54 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.
Industry payments in 2024: $468.19
15 payments; by number, the most common kind was food and beverage; the largest payer was Almatica Pharma LLC. 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.
Mark Phillips Siegel among 3,119 family medicine physician records in Arizona
Mark Phillips Siegel, D.O. 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
- Graduated1987 · median 2006 among the 1,775 with a school on file
- Record last updated2012 · 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
- Ahmed Agha, M.D., PHARMDPhoenix, AZ 850151063413524
- Dawn Cohen, MDPhoenix, AZ 850151033174248
- Douglas Cunningham, D.O.Phoenix, AZ 850151104856475
- Ian Frankfort, MDPhoenix, AZ 850151295790293
- Sylvia Gutierrez, MDPhoenix, AZ 850151023103264
- Phillip Hipps, M.D.Phoenix, AZ 850151831270180
- Patrick Knowles, MDPhoenix, AZ 850151053313452
- Steven McRunels, DOPhoenix, AZ 850151750394144
Common questions
What is Mark Phillips Siegel, D.O.'s NPI number?
Mark Phillips Siegel, D.O.'s National Provider Identifier (NPI) is 1487690046, issued on Jun 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Phillips Siegel, D.O. located?
The NPPES record lists a practice address at 1820 W Maryland Ave, Phoenix, AZ, 85015. Phone: (602) 242-4100. Providers update this record themselves, so call before visiting.
How can I verify Mark Phillips Siegel, D.O.'s license?
NPPES lists Arizona license number 2479, 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 Phillips Siegel, D.O. prescribe under Medicare Part D?
In 2024, Mark Phillips Siegel, D.O. had 2,055 Medicare Part D claims for 192 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.