Tamara Dahhan, D.O.
Rheumatology Physician · Sylmar, CA
Tamara Dahhan, D.O. is a rheumatology physician with a practice address in Sylmar, California, and NPI 1093074627, issued on May 16, 2012. Check the license (California 20A13140, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tamara Dahhan
- Credential
- D.O.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 20A13140 CA
Self-reported in NPPES; status is on the state search - Practice location
- 14445 Olive View Dr, Sylmar, CA 91342
- Phone
- (818) 364-3205
- Enumerated
- May 16, 2012
- Record last updated
- Aug 1, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150916000181); accepts Medicare assignment
- Medical or professional school
- Western University Of Health Sciences College Of Dental Med, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 14445 Olive View Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nasser Abdo, MDInternal Medicine Physician1306911649
- Gezman Abdullahi, M.D.Internal Medicine Physician1225394380
- Moyosore Abere, NPNurse Practitioner1225667314
- Ammini Abraham, MDAnesthesiology Physician1467531541
- Margarita Acosta, RN, AGACNPAcute Care Nurse Practitioner1609202415
- Fredric Adler, MDInternal Medicine Physician1356376735
Verify Tamara Dahhan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A13140Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,618 Medicare Part D claims for 256 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 105 claims were for opioids.
Most prescribed
- Prednisone174 claims
- Methotrexate160 claims
- Hydroxychloroquine Sulfate142 claims
- Gabapentin90 claims
- Pregabalin66 claims
- Duloxetine 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.1 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: $36.60
1 payment: education; the largest payer was Pfizer Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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.
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaPorter Ranch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tamara Dahhan among 926 rheumatology physician records in California
Tamara Dahhan, D.O. is one of 926 rheumatology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 71% of them.
- NPI issued2012 · 71% of these records are older, 25% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2012 · median 2003 among the 641 with a school on file
- Record last updated2018 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Sylmar → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- James Chung, MDSylmar, CA 913421588742415
- Gretel D'Souza, M.D.Sylmar, CA 913421679138531
- Primal Kaur, MD, MBASylmar, CA 913421851380786
- Andrew Wong, M.D.Sylmar, CA 913421427137967
- Rosa Artola, D.O.Mission Hills, CA 913451962848978
- Joseph Mehrabi, MDMission Hills, CA 913451942886379
- Hitasha Singh, M.D.Mission Hills, CA 913451508189143
- Paul Sussman, MD.Mission Hills, CA 913451336168863
Common questions
What is Tamara Dahhan, D.O.'s NPI number?
Tamara Dahhan, D.O.'s National Provider Identifier (NPI) is 1093074627, issued on May 16, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Tamara Dahhan, D.O. located?
The NPPES record lists a practice address at 14445 Olive View Dr, Sylmar, CA, 91342. Phone: (818) 364-3205. Providers update this record themselves, so call before visiting.
How can I verify Tamara Dahhan, D.O.'s license?
NPPES lists California license number 20A13140, as entered by the provider. 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 Tamara Dahhan, D.O. prescribe under Medicare Part D?
In 2024, Tamara Dahhan, D.O. had 1,618 Medicare Part D claims for 256 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Tamara Dahhan, D.O.'s MIPS final score?
The 2023 MIPS final score is 86.1 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), 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.