Steven R. Corwin, MD
Ophthalmology Physician · Thousand Oaks, CA
Steven R. Corwin, MD is an ophthalmology physician with a practice address in Thousand Oaks, California, and NPI 1720089964, issued on Aug 10, 2005. Check the license (California G139740, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven R. Corwin
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- G139740 CA
Self-reported in NPPES; status is on the state search - Practice location
- 351 Rolling Oaks Dr Ste 102, Thousand Oaks, CA 91361
- Phone
- (805) 497-3744
- Enumerated
- Aug 10, 2005
- Record last updated
- Mar 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (805) 497-1663
- Medicare enrollment
- Enrolled (PECOS I20160830003230); accepts Medicare assignment
- Medical or professional school
- Medical College Of Pennsylvania, 1983
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 351 Rolling Oaks Dr Ste 102
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniel Ebroon, M.D.Ophthalmology Physician1023050655
- Shayna Mangers, MDOphthalmology Physician1699802496
- Ashish Toor, MDOphthalmology Physician1336309681
Verify Steven R. Corwin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G139740Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% more Medicare Part D claims than the average ophthalmology physician in 2024
2,280 Medicare Part D claims for 528 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 58% of claims.
Most prescribed
- Prednisolone Acetate423 claims
- Latanoprost286 claims
- Ketorolac Tromethamine277 claims
- Moxifloxacin276 claims
- Restasis139 claims
- Cyclosporine125 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): 89.8 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: $957.80
30 payments; by number, the most common kind was food and beverage; the largest payer was Glaukos Corporation. The 13,221 providers of this specialty with any payment received $4,535.02 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
- Cse Medical Group Inc.Simi Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven R. Corwin among 2,899 ophthalmology physician records in California
Steven R. Corwin, MD is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1983 · median 2001 among the 1,907 with a school on file
- Record last updated2021 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Thousand Oaks → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Adam Abroms, MDWestlake Village, CA 913611497743702
- Joseph Chen, M.D.Westlake Village, CA 913611639496953
- Paul Dougherty, M.D.Westlake Village, CA 913611083744775
- Daniel Ebroon, M.D.Thousand Oaks, CA 913611023050655
- George Hoffman, MDWestlake Village, CA 913611689869356
- Lynn Huang, MD, MPHWestlake Village, CA 913611689808438
- Shalini Kapoor, M.D.Westlake Village, CA 913611932206224
- Rajesh Khanna, M.DWestlake Village, CA 913611104854249
Common questions
What is Steven R. Corwin, MD's NPI number?
Steven R. Corwin, MD's National Provider Identifier (NPI) is 1720089964, issued on Aug 10, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Steven R. Corwin, MD located?
The NPPES record lists a practice address at 351 Rolling Oaks Dr Ste 102, Thousand Oaks, CA, 91361. Phone: (805) 497-3744. Providers update this record themselves, so call before visiting.
How can I verify Steven R. Corwin, MD's license?
NPPES lists California license number G139740, 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 Steven R. Corwin, MD prescribe under Medicare Part D?
In 2024, Steven R. Corwin, MD had 2,280 Medicare Part D claims for 528 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Steven R. Corwin, MD's MIPS final score?
The 2023 MIPS final score is 89.8 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.