Mark S. Zaremba, MD
Cardiovascular Disease Physician · Laguna Hills, CA
Mark S. Zaremba, MD is a cardiovascular disease physician with a practice address in Laguna Hills, California, and NPI 1023094273, issued on Dec 20, 2005. Check the license (California G38301, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark S. Zaremba
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- G38301 CA
Self-reported in NPPES; status is on the state search - Practice location
- 25401 Cabot RD, Laguna Hills, CA 92653
- Phone
- (949) 273-8085
- Enumerated
- Dec 20, 2005
- Record last updated
- Aug 30, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (949) 273-8088
- Medicaid ID
- OOG383010 CA
- Medicare enrollment
- Enrolled (PECOS I20041222000525); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1975
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 2,574 in California → Look up another NPI →
Also registered at 25401 Cabot RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark S. Zaremba in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G38301Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
1,837 Medicare Part D claims for 155 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium203 claims
- Losartan Potassium144 claims
- Metoprolol Succinate103 claims
- Amlodipine Besylate101 claims
- Atorvastatin Calcium68 claims
- Carvedilol58 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: $510.20
21 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 16,686 providers of this specialty with any payment received $3,819.56 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.
Mark S. Zaremba among 2,574 cardiovascular disease physician records in California
Mark S. Zaremba, MD is one of 2,574 cardiovascular disease physician records with a practice address in California. 83% 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, 90% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1975 · median 1999 among the 1,742 with a school on file
- Record last updated2010 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in California
There are 2,574 cardiovascular disease physician records in California.
All 2,574 in California → Every provider in Laguna Hills → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Jeffrey Feiner, M.D.Laguna Hills, CA 926531962594309
- Michael Gault, M.D.Laguna Hills, CA 926531598857930
- Sasan Ghaffari, MDLaguna Hills, CA 926531821092685
- Ronald Gim, M.D.Laguna Hills, CA 926531316039753
- Inderpal Gujral, MDLaguna Hills, CA 926531063416410
- James Hawkins, MDLaguna Hills, CA 926531043279177
- George Konugres, DOLaguna Hills, CA 926531740284108
- Daniel Lamont, M.D.Laguna Hills, CA 926531407948847
Common questions
What is Mark S. Zaremba, MD's NPI number?
Mark S. Zaremba, MD's National Provider Identifier (NPI) is 1023094273, issued on Dec 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark S. Zaremba, MD located?
The NPPES record lists a practice address at 25401 Cabot RD, Laguna Hills, CA, 92653. Phone: (949) 273-8085. Providers update this record themselves, so call before visiting.
How can I verify Mark S. Zaremba, MD's license?
NPPES lists California license number G38301, 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 Mark S. Zaremba, MD prescribe under Medicare Part D?
In 2024, Mark S. Zaremba, MD had 1,837 Medicare Part D claims for 155 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.