Michael Orenstein
Internal Medicine Physician · Tucson, AZ
Michael Orenstein is an internal medicine physician with a practice address in Tucson, Arizona, and NPI 1093193351, issued on May 7, 2015. Check the license on the Arizona Medical Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Michael Orenstein
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 144524 NY
Self-reported in NPPES; status is on the state search - Practice location
- 8391 E Cresthill Dr, Tucson, AZ 85750
- Phone
- (973) 809-8702
- Enumerated
- May 7, 2015
- Record last updated
- May 7, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 8391 E Cresthill Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marilyn Orenstein, MDPulmonary Disease Physician1922122993
Verify Michael Orenstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Michael Orenstein among 2,853 internal medicine physician records in Arizona
Michael Orenstein 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 not. Its NPI, issued in 2015, is newer than 70% of them.
- NPI issued2015 · 70% of these records are older, 27% newer
- In a Medicare fileNo · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2015 · 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).
651 internal medicine physician records list a practice address in Tucson
They are 651 of the 18,788 NPPES records with a practice address in Tucson, and 2,853 internal medicine physician records in Arizona. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,853 in Arizona → Every provider in Tucson → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jack Ajmeri, MDTucson, AZ 857501982660783
- Stephen Brewer, M.D.Tucson, AZ 857501265648554
- Natalie Davis, MDTucson, AZ 857501376125997
- Michael Maximov, M.D.Tucson, AZ 857501376556068
- Sangeetha Murugapandian, M.DTucson, AZ 857501619283629
- Patrick Noonan, D.O.Tucson, AZ 857501346561040
- Richard Rhiew, MDTucson, AZ 857501346226479
- Shagun Singh, M.D.Tucson, AZ 857501730634346
Common questions
What is Michael Orenstein's NPI number?
Michael Orenstein's National Provider Identifier (NPI) is 1093193351, issued on May 7, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Michael Orenstein located?
The NPPES record lists a practice address at 8391 E Cresthill Dr, Tucson, AZ, 85750. Phone: (973) 809-8702. Providers update this record themselves, so call before visiting.
How can I verify Michael Orenstein's license?
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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.