Aaron F. Sassoon, M.D.
Anatomic Pathology & Clinical Pathology Physician · Orange, CA
Aaron F. Sassoon, M.D. is an anatomic pathology & clinical pathology physician with a practice address in Orange, California, and NPI 1962581967, issued on Nov 2, 2006. Check the license (California G73918, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Aaron F. Sassoon
- Credential
- M.D.
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- G73918 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1201 W LA Veta Ave, Orange, CA 92868
- Phone
- (714) 288-4044
- Enumerated
- Nov 2, 2006
- Record last updated
- Oct 10, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (714) 288-2042
- Medicaid ID
- 00G739180 CA
- Medicare enrollment
- Enrolled (PECOS I20100729000752); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 1,554 in California → Look up another NPI →
Also registered at 1201 W LA Veta Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sarah AbbamontoClinical Social Worker1396268553
- Yesenia Acosta, ACSWClinical Social Worker1114744513
- Natalie Adame, PNPPrimary Care Nurse Practitioner1750993622
- David Adams, M.D.Neurology with Special Qualifications in Child Neurology Physician1497109722
- William Adelman, M.D.Pediatric Adolescent Medicine Physician1831191386
- Isela Aguirre Verdugo, LCSWClinical Social Worker1316465834
Verify Aaron F. Sassoon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G73918Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average anatomic pathology & clinical pathology physician in 2024
35 Medicare Part D claims, against an average of 192 among the 401 providers of this specialty who prescribed in Part D.
Most prescribed
- Valacyclovir11 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): 79.4 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).
Bills Medicare through one group practice
- Newport Harbor Pathology Medical Group IncNewport Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron F. Sassoon among 1,554 anatomic pathology & clinical pathology physician records in California
Aaron F. Sassoon, M.D. is one of 1,554 anatomic pathology & clinical pathology physician records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 57% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1990 · median 2003 among the 891 with a school on file
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in California
There are 1,554 anatomic pathology & clinical pathology physician records in California.
All 1,554 in California → Every provider in Orange → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Vishal Chandan, MDOrange, CA 928681841203445
- Luis M De La Maza, MDOrange, CA 928681275613374
- Michael Dugan, M.D.Orange, CA 928681649492745
- Robert A Edwards, MDOrange, CA 928681790865830
- Bijan Haghighi, M.D.Orange, CA 928681790868909
- Irina B Knezevic-Maramica, MDOrange, CA 928681790865905
- Lisa Kohorn, M.D.Orange, CA 928681720097066
- Shu Yuan Liao, M.D.Orange, CA 928681376601732
Common questions
What is Aaron F. Sassoon, M.D.'s NPI number?
Aaron F. Sassoon, M.D.'s National Provider Identifier (NPI) is 1962581967, issued on Nov 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Aaron F. Sassoon, M.D. located?
The NPPES record lists a practice address at 1201 W LA Veta Ave, Orange, CA, 92868. Phone: (714) 288-4044. Providers update this record themselves, so call before visiting.
How can I verify Aaron F. Sassoon, M.D.'s license?
NPPES lists California license number G73918, 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 Aaron F. Sassoon, M.D. prescribe under Medicare Part D?
In 2024, Aaron F. Sassoon, M.D. had 35 Medicare Part D claims; the average among anatomic pathology & clinical pathology physician prescribers was 192. Part D covers Medicare prescriptions only.
What is Aaron F. Sassoon, M.D.'s MIPS final score?
The 2023 MIPS final score is 79.4 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.