Emma Claire Marcus, DO
Family Medicine Physician · Santa Maria, CA
Emma Claire Marcus, DO is a family medicine physician with a practice address in Santa Maria, California, and NPI 1952006124, issued on Apr 4, 2023. Check the license (California 20A23146, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Emma Claire Marcus
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A23146 CA
Self-reported in NPPES; status is on the state search - Practice location
- 821 E Chapel St Ste 103, Santa Maria, CA 93454
- Phone
- (805) 310-5330
- Enumerated
- Apr 4, 2023
- Record last updated
- Jun 30, 2026
- Fax
- (805) 310-5339
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 821 E Chapel St Ste 103
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Laura Theis, M.D.Family Medicine Physician1417954017
Verify Emma Claire Marcus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A23146Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average family medicine physician in 2024
264 Medicare Part D claims for 59 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium18 claims
- Amlodipine Besylate14 claims
- Rosuvastatin Calcium13 claims
- Arnuity Ellipta11 claims
- Jardiance11 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: $14.81
1 payment: food and beverage; the largest payer was Immunitybio, Inc. The 55,478 providers of this specialty with any payment received $902.55 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.
Emma Claire Marcus among 17,133 family medicine physician records in California
Emma Claire Marcus, DO is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 97% of them.
- NPI issued2023 · 97% of these records are older, 1% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
79 family medicine physician records list a practice address in Santa Maria
They are 79 of the 3,047 NPPES records with a practice address in Santa Maria, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Santa Maria → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jesse Arellano, MDSanta Maria, CA 934541285659284
- Thomas Dawes, MDSanta Maria, CA 934541386668473
- Kamlesh Desai, M.D.Santa Maria, CA 934541336137850
- Brian Desmond, M.D.Santa Maria, CA 934541972591865
- Eric Levy, M.D.Santa Maria, CA 934541891779021
- Richard McClaflin, MDSanta Maria, CA 934541912939075
- Brian Miyagishima, MDSanta Maria, CA 934541801870662
- Mary Jane Morash, MDSanta Maria, CA 934541154351195
Common questions
What is Emma Claire Marcus, DO's NPI number?
Emma Claire Marcus, DO's National Provider Identifier (NPI) is 1952006124, issued on Apr 4, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Emma Claire Marcus, DO located?
The NPPES record lists a practice address at 821 E Chapel St Ste 103, Santa Maria, CA, 93454. Phone: (805) 310-5330. Providers update this record themselves, so call before visiting.
How can I verify Emma Claire Marcus, DO's license?
NPPES lists California license number 20A23146, 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 Emma Claire Marcus, DO prescribe under Medicare Part D?
In 2024, Emma Claire Marcus, DO had 264 Medicare Part D claims for 59 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.