Alan Marcus, M.D
Endocrinology, Diabetes & Metabolism Physician · Laguna Hills, CA
Alan Marcus, M.D is an endocrinology, diabetes & metabolism physician with a practice address in Laguna Hills, California, and NPI 1275631657, issued on Sep 20, 2006. Check the license (California A39696, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alan Marcus
- Credential
- M.D
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A39696 CA
Self-reported in NPPES; status is on the state search - Practice location
- 24422 Avenida DE LA Carlota Ste 375, Laguna Hills, CA 92653
- Phone
- (949) 770-4177
- Enumerated
- Sep 20, 2006
- Record last updated
- Nov 14, 2025
- Fax
- (949) 472-0305
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Verify Alan Marcus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A39696Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average endocrinology, diabetes & metabolism physician in 2024
8,037 Medicare Part D claims for 351 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of claims. 11 claims were for opioids.
Most prescribed
- Ozempic621 claims
- Rosuvastatin Calcium419 claims
- Ezetimibe395 claims
- Metformin Hcl380 claims
- Mounjaro325 claims
- Synthroid297 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: $4,573.00
266 payments; by number, the most common kind was food and beverage; the largest payer was Aimmune Therapeutics, Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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.
Alan Marcus among 1,131 endocrinology, diabetes & metabolism physician records in California
Alan Marcus, M.D is one of 1,131 endocrinology, diabetes & metabolism 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 54% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2025 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Laguna Hills → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Kimvir Dhillon, MDLaguna Hills, CA 926531083673248
- Priyanka Krishnan, M.D.Laguna Hills, CA 926531497940712
- Ghasak Mahmood, M.D.Laguna Hills, CA 926531215116116
- Lisa Markman, MDLaguna Hills, CA 926531780888610
- Gabrielle O'Connor, M.D.Laguna Beach, CA 926511720118961
- Eric Stevens, MDHuntington Beach, CA 926491215314430
- Scott Ahl, D.O.Huntington Beach, CA 926481558674523
- Robert NicoloffHuntington Beach, CA 926481982770350
Common questions
What is Alan Marcus, M.D's NPI number?
Alan Marcus, M.D's National Provider Identifier (NPI) is 1275631657, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alan Marcus, M.D located?
The NPPES record lists a practice address at 24422 Avenida DE LA Carlota Ste 375, Laguna Hills, CA, 92653. Phone: (949) 770-4177. Providers update this record themselves, so call before visiting.
How can I verify Alan Marcus, M.D's license?
NPPES lists California license number A39696, 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 Alan Marcus, M.D prescribe under Medicare Part D?
In 2024, Alan Marcus, M.D had 8,037 Medicare Part D claims for 351 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.