Tara Maria Ostrom, M.D.
Internal Medicine Physician · Phoenix, AZ
Tara Maria Ostrom, M.D. is an internal medicine physician with a practice address in Phoenix, Arizona, and NPI 1124017009, issued on Oct 13, 2005. Check the license (Arizona 26889, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Tara Maria Ostrom
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 26889 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 20040 N 19TH Ave, Phoenix, AZ 85027
- Phone
- (623) 869-5000
- Enumerated
- Oct 13, 2005
- Record last updated
- Jan 27, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (623) 869-0927
- Medicaid ID
- 565492 AZ
- Medicare enrollment
- Enrolled (PECOS I20100929000928); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 20040 N 19TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Monica Camille Cavarlez-Cowden, MDInternal Medicine Physician1992385090
- Viviane CheNurse Practitioner1013455518
- Alexa EricksonAmbulatory Care Pharmacist1851186142
- Marsha Evans, ANPAdult Health Nurse Practitioner1245208172
- Bruce Herman, M.D.Internal Medicine Physician1801894951
- Sarah Hughes, PAPhysician Assistant1861421513
Verify Tara Maria Ostrom in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 26889Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,649 Medicare Part D claims for 355 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 22 claims were for opioids.
Most prescribed
- Atorvastatin Calcium234 claims
- Levothyroxine Sodium212 claims
- Amlodipine Besylate132 claims
- Rosuvastatin Calcium127 claims
- Losartan Potassium124 claims
- Lisinopril112 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
- Greater Phoenix Collaborative Care PCPhoenix, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tara Maria Ostrom among 2,853 internal medicine physician records in Arizona
Tara Maria Ostrom, 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 fileYes · 58% of these records are
- Graduated1996 · median 2003 among the 1,643 with a school on file
- Record last updated2017 · 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).
695 internal medicine physician records list a practice address in Phoenix
They are 695 of the 31,399 NPPES records with a practice address in Phoenix, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Phoenix → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Marium Asad, M.D.Phoenix, AZ 850271518458157
- Lawrence Chua, M.D.Phoenix, AZ 850271487613691
- Jatin Daas, M.DPhoenix, AZ 850271326141722
- Uma Gunnala, MDPhoenix, AZ 850271881770220
- Shailaja Gunnala, MDPhoenix, AZ 850271265503221
- Nasser Hajaig, MDPhoenix, AZ 850271457324204
- Bruce Herman, M.D.Phoenix, AZ 850271801894951
- Shannan Murphy, MDPhoenix, AZ 850271083688253
Common questions
What is Tara Maria Ostrom, M.D.'s NPI number?
Tara Maria Ostrom, M.D.'s National Provider Identifier (NPI) is 1124017009, issued on Oct 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Tara Maria Ostrom, M.D. located?
The NPPES record lists a practice address at 20040 N 19TH Ave, Phoenix, AZ, 85027. Phone: (623) 869-5000. Providers update this record themselves, so call before visiting.
How can I verify Tara Maria Ostrom, M.D.'s license?
NPPES lists Arizona license number 26889, 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 Tara Maria Ostrom, M.D. prescribe under Medicare Part D?
In 2024, Tara Maria Ostrom, M.D. had 2,649 Medicare Part D claims for 355 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.