Oliver Ross
Nephrology Physician · Irvine, CA
Oliver Ross is a nephrology physician with a practice address in Irvine, California, and NPI 1215228762, issued on May 2, 2011. Check the license (California A123913, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Oliver Ross
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A123913 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6650 Alton Pkwy, Irvine, CA 92618
- Phone
- (949) 932-5000
- Enumerated
- May 2, 2011
- Record last updated
- Dec 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150916003736); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 6650 Alton Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dayle Aldridge, RN, CDE, MPHDiabetes Educator Registered Nurse1619400223
- Tiffany ChavesRegistered Dietitian1194169177
- William Chen, M.D.Internal Medicine Physician1881659142
- Raymond Cho, PHARMDPharmacist1992272306
- Travis Cohoon, MDCardiovascular Disease Physician1205363264
- Jasmine CrouzetPharmacist1770122665
Verify Oliver Ross in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A123913Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% more Medicare Part D claims than the average nephrology physician in 2024
2,350 Medicare Part D claims for 438 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Losartan Potassium288 claims
- Amlodipine Besylate194 claims
- Furosemide167 claims
- Atorvastatin Calcium124 claims
- Carvedilol123 claims
- Metoprolol Tartrate120 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Oliver Ross among 1,468 nephrology physician records in California
Oliver Ross is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 76% of them.
- NPI issued2011 · 76% of these records are older, 20% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2011 · median 2001 among the 1,128 with a school on file
- Record last updated2021 · 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 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Irvine → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Jacob Ahdoot, MDIrvine, CA 926181952356214
- Azita Mesbah, MDIrvine, CA 926181184670630
- Maya Bidichandani-Kaura, MDDana Point, CA 926291992803167
- David Chang, M.D.Wildomar, CA 925951043266240
- Peter Lac, M.D.Wildomar, CA 925951881617652
- Shankha Nandi, D.O.Wildomar, CA 925951437326410
- Rachel Roan, MDWildomar, CA 925951003496894
- Weng-Lih Wang, M.D.Wildomar, CA 925951467499145
Common questions
What is Oliver Ross's NPI number?
Oliver Ross's National Provider Identifier (NPI) is 1215228762, issued on May 2, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Oliver Ross located?
The NPPES record lists a practice address at 6650 Alton Pkwy, Irvine, CA, 92618. Phone: (949) 932-5000. Providers update this record themselves, so call before visiting.
How can I verify Oliver Ross's license?
NPPES lists California license number A123913, 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 Oliver Ross prescribe under Medicare Part D?
In 2024, Oliver Ross had 2,350 Medicare Part D claims for 438 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
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.