Tamar Rosner Davidson, PA-C
Physician Assistant · Mission Viejo, CA
Tamar Rosner Davidson, PA-C is a physician assistant with a practice address in Mission Viejo, California, and NPI 1619390614, issued on Jan 27, 2014. Check the license (California 51249, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tamar Rosner Davidson
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 51249 CA
Self-reported in NPPES; status is on the state search - Practice location
- 26012 Marguerite Pkwy Ste H, Mission Viejo, CA 92692
- Phone
- (888) 227-3312
- Enumerated
- Jan 27, 2014
- Record last updated
- Apr 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Verify Tamar Rosner Davidson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 51249Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average physician assistant in 2024
311 Medicare Part D claims for 223 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Albuterol Sulfate Hfa37 claims
- Nitrofurantoin Mono-Macro33 claims
- Mupirocin25 claims
- Amoxicillin-Clavulanate Potass21 claims
- Cephalexin19 claims
- Azithromycin16 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): 55.3 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).
Tamar Rosner Davidson among 14,451 physician assistant records in California
Tamar Rosner Davidson, PA-C is one of 14,451 physician assistant records with a practice address in California. 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 2014, is newer than 38% of them.
- NPI issued2014 · 38% of these records are older, 59% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2021 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
50 physician assistant records list a practice address in Mission Viejo
They are 50 of the 2,156 NPPES records with a practice address in Mission Viejo, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Mission Viejo → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Elizabeth PhillipsMission Viejo, CA 926921306216361
- Nazanin AlaghemandMission Viejo, CA 926911639784796
- Alyssa Castle, PAMission Viejo, CA 926911356958425
- Brett Cirbo, PAMission Viejo, CA 926911861153223
- Sydney CohenMission Viejo, CA 926911437986171
- Selma DjokovicMission Viejo, CA 926911568160810
- Jessica ElderkinMission Viejo, CA 926911578330064
- Connor GalbraithMission Viejo, CA 926911619783156
Common questions
What is Tamar Rosner Davidson, PA-C's NPI number?
Tamar Rosner Davidson, PA-C's National Provider Identifier (NPI) is 1619390614, issued on Jan 27, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Tamar Rosner Davidson, PA-C located?
The NPPES record lists a practice address at 26012 Marguerite Pkwy Ste H, Mission Viejo, CA, 92692. Phone: (888) 227-3312. Providers update this record themselves, so call before visiting.
How can I verify Tamar Rosner Davidson, PA-C's license?
NPPES lists California license number 51249, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Tamar Rosner Davidson, PA-C prescribe under Medicare Part D?
In 2024, Tamar Rosner Davidson, PA-C had 311 Medicare Part D claims for 223 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Tamar Rosner Davidson, PA-C's MIPS final score?
The 2023 MIPS final score is 55.3 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.