Catherine Koper, MD
Internal Medicine Physician · Newport Beach, CA
Catherine Koper, MD is an internal medicine physician with a practice address in Newport Beach, California, and NPI 1245466929, issued on Jun 8, 2009. Check the license (California A13199, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Catherine Koper
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A13199 CA
25MA09408000 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 320 Superior Ave, Newport Beach, CA 92663
- Phone
- (949) 515-3590
- Enumerated
- Jun 8, 2009
- Record last updated
- Sep 29, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20141023000258); may accept Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 320 Superior Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Yung Ko, PHARMACISTPharmacist1710195920
- Jeffrey Lauber, MDDermatology Physician1467626499
Verify Catherine Koper in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A13199Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,232 Medicare Part D claims for 205 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Meropenem164 claims
- Ertapenem148 claims
- Vancomycin Hcl99 claims
- Doxycycline Hyclate98 claims
- Daptomycin90 claims
- Cefepime Hcl80 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.
Industry payments in 2024: $180.63
8 payments; by number, the most common kind was food and beverage; the largest payer was ViiV Healthcare Company. The 50,334 providers of this specialty with any payment received $1,303.06 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.
94 internal medicine physician records list a practice address in Newport Beach
They are 94 of the 4,414 NPPES records with a practice address in Newport Beach, and 17,696 internal medicine physician records in California.
All 94 in Newport Beach → All 17,696 in California → Every provider in Newport Beach →
Other internal medicine physician records in California
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- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Catherine Koper, MD's NPI number?
Catherine Koper, MD's National Provider Identifier (NPI) is 1245466929, issued on Jun 8, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Koper, MD located?
The NPPES record lists a practice address at 320 Superior Ave, Newport Beach, CA, 92663. Phone: (949) 515-3590. Providers update this record themselves, so call before visiting.
How can I verify Catherine Koper, MD's license?
NPPES lists California license number A13199, 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 Catherine Koper, MD prescribe under Medicare Part D?
In 2024, Catherine Koper, MD had 1,232 Medicare Part D claims for 205 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.