Shirin Attarian, M.D.
Hematology (Internal Medicine) Physician · Orange, CA
Shirin Attarian, M.D. is a hematology (internal medicine) physician with a practice address in Orange, California, and NPI 1427310713, issued on Jun 12, 2012. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Shirin Attarian
- Credential
- M.D.
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- Practice location
- 101 The City Dr S, Orange, CA 92868
- Phone
- (714) 456-8000
- Enumerated
- Jun 12, 2012
- Entity
- Type 1 · individual
Also registered at 101 The City Dr S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danny Abad, PAPhysician Assistant1477158673
- Edward AbaradoStudent in an Organized Health Care Education/Training Program1912855198
- Nagina Abdiani, DOGeriatric Medicine (Family Medicine) Physician1518543271
- Mariam Abdul-Latif, M.D.Pediatrics Physician1538418884
- Eric AbelloOtolaryngology Physician1922566215
- Brandon Abeyta, MDAnesthesiology Physician1841291804
Verify Shirin Attarian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
74% fewer Medicare Part D claims than the average hematology (internal medicine) physician in 2024
181 Medicare Part D claims for 28 beneficiaries, against an average of 684 among the 1,054 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Olanzapine36 claims
- Dexamethasone27 claims
- Prochlorperazine Maleate26 claims
- Ondansetron Hcl20 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.
The practice group's Medicare quality score for 2023: 74.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $269.99
2 payments, mostly food and beverage; the largest payer was Janssen Biotech, Inc.. The 778 providers of this specialty with any payment received $13,696.27 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.
One hospital or facility affiliation
- UC RegentsOrange, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Hematology (Internal Medicine) Physician providers in California
There are 132 hematology (internal medicine) physician records in California.
Other hematology (internal medicine) physician records in California
- Haifaa Abdulhaq, MDFresno, CA1508024647
- John Adamson, MDSan Diego, CA1477504801
- Julio Alvarenga Thiebaud, M.D.Irvine, CA1457770497
- Idoroenyi Amanam, M.D.Duarte, CA1205257920
- Ian Anderson, M.D.Santa Rosa, CA1518055573
- Sally Arai, MDStanford, CA1881739530
- Kavya Babu, MDSacramento, CA1922682392
- John Baird, MDDuarte, CA1427493998
- Brian Ball, M.D.Duarte, CA1356754683
- Edward Ball, M.D.San Diego, CA1093740110
Common questions
What is Shirin Attarian, M.D.'s NPI number?
Shirin Attarian, M.D.'s National Provider Identifier (NPI) is 1427310713, issued on Jun 12, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Shirin Attarian, M.D. located?
The NPPES record lists a practice address at 101 The City Dr S, Orange, CA, 92868. Phone: (714) 456-8000. Providers update this record themselves, so call before visiting.
How can I verify Shirin Attarian, M.D.'s license?
Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Shirin Attarian, M.D. prescribe under Medicare Part D?
In 2024, Shirin Attarian, M.D. had 181 Medicare Part D claims for 28 beneficiaries; the average among hematology (internal medicine) physician prescribers was 684. Part D covers Medicare prescriptions only.
What is Shirin Attarian, M.D.'s Medicare quality score?
The 2023 MIPS final score is 74.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.