Ahmad Abou Abbass, M.D
Surgical Oncology Physician · Mission Viejo, CA
Ahmad Abou Abbass, M.D is a surgical oncology physician with a practice address in Mission Viejo, California, and NPI 1790946895, issued on Jun 20, 2008. Check the license (California A152200, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ahmad Abou Abbass
- Credential
- M.D
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License numbers
- A152200 CA
4301091303 MI
Self-reported in NPPES; status is on the state search - Practice location
- 26732 Crown Valley Pkwy Ste 351, Mission Viejo, CA 92691
- Phone
- (949) 364-1007
- Enumerated
- Jun 20, 2008
- Record last updated
- Apr 9, 2026
- Fax
- (949) 364-6057
- Medicare enrollment
- Enrolled (PECOS I20180511001475); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 250 in California → Look up another NPI →
Also registered at 26732 Crown Valley Pkwy Ste 351
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew BradySurgery Physician1376863621
- Marialejandra Diaz Ibarra, MDRetina Specialist (Ophthalmology) Physician1851031173
- Ashley Mergelmeyer, PA-CPhysician Assistant1902397219
- Kathy Nguyen, AGACNP-BCAcute Care Nurse Practitioner1437702552
- Katie Rogers, NPAcute Care Nurse Practitioner1649767476
Verify Ahmad Abou Abbass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A152200Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average surgical oncology physician in 2024
30 Medicare Part D claims for 16 beneficiaries, against an average of 87 among the 1,237 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Creon16 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: $104,009.46
80 payments; by number, the most common kind was education; the largest payer was Intuitive Surgical, Inc. The 1,132 providers of this specialty with any payment received $4,224.74 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 2 group practices
- City OF Hope Medical FoundationIrvine, CA
- South Orange County Surgical Medical Group IncLaguna Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ahmad Abou Abbass among 250 surgical oncology physician records in California
Ahmad Abou Abbass, M.D is one of 250 surgical oncology physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 50% of them.
- NPI issued2008 · 50% of these records are older, 42% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2002 · median 2004 among the 184 with a school on file
- Record last updated2026 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in California
There are 250 surgical oncology physician records in California.
All 250 in California → Every provider in Mission Viejo → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- Lana Boladian, PA-CNewport Beach, CA 926631518722297
- Megan Gregor, NPNewport Beach, CA 926631699232801
- Melvin Silverstein, MDNewport Beach, CA 926581699707372
- Amy Copeland, MDIrvine, CA 926181013301365
- Emanuel Shapera, MDTemecula, CA 925921407268790
- Christopher McNicoll, M.D.Anaheim, CA 928061164764841
- Robina Smith, M.D.Fullerton, CA 928351558561860
- Glenn Allison, M.D.Orange, CA 928661245386051
Common questions
What is Ahmad Abou Abbass, M.D's NPI number?
Ahmad Abou Abbass, M.D's National Provider Identifier (NPI) is 1790946895, issued on Jun 20, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Ahmad Abou Abbass, M.D located?
The NPPES record lists a practice address at 26732 Crown Valley Pkwy Ste 351, Mission Viejo, CA, 92691. Phone: (949) 364-1007. Providers update this record themselves, so call before visiting.
How can I verify Ahmad Abou Abbass, M.D's license?
NPPES lists California license number A152200, 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 Ahmad Abou Abbass, M.D prescribe under Medicare Part D?
In 2024, Ahmad Abou Abbass, M.D had 30 Medicare Part D claims for 16 beneficiaries; the average among surgical oncology physician prescribers was 87. Part D covers Medicare prescriptions only.
What is Ahmad Abou Abbass, M.D'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.