Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Healthcare Providers & Facilities in San Marcos, CA

Public healthcare directory of 1,991 individual practitioners and 371 healthcare facilities located in San Marcos, California.

1,991 Practitioners
371 Facilities
143 Specialties

Medical Specialties in San Marcos

Select a specialty to view practitioner listings, practice locations, and qualifications.

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All Specialties in San Marcos

Specialties with enough public records for a comparison with U.S. figures, besides those named above, plus the 60 largest of 128 more with at least one listed practitioner. Number of practitioners in brackets.

Dietary & Nutritional Service Providers

Eye and Vision Services Providers

Nursing Service Related Providers

Podiatric Medicine & Surgery Service Providers

Featured Healthcare Providers in San Marcos

Practitioner profiles in San Marcos, CA with recent CMS Medicare or Open Payments data.

Heather Seierstad , NP

Nurse Practitioner - Family

Medicare Accepted
417 E Carmel St Ste 200, San Marcos, CA
Phone: 3453267858
NPI 1356060172

Rami Fodda , FNP

Nurse Practitioner

150 Valpreda Rd, San Marcos, CA
Phone: 7607366767
NPI 1164660452

Erin Rasmussen , OTR, L, CHT

Occupational Therapist

Medicare Accepted
1646 La Madera Ln, San Marcos, CA
Phone: 3609099690
NPI 1508332834

Dr. Suzanne Schweikert , MD

Obstetrics & Gynecology

Medicare Accepted
150 Valpreda Rd, San Marcos, CA
Phone: 7607366700
NPI 1477560142

Dr. Philip Marjon , MD

Internal Medicine - Hematology & Oncology

Medicare Accepted
838 Nordahl Rd Ste 300, San Marcos, CA
Phone: 7607478935
NPI 1912234121

Dr. Jason Edwards , DC

Chiropractor

Medicare Accepted
940 W San Marcos Blvd, San Marcos, CA
Phone: 7607441881
NPI 1114022696

Largest Cities in California

Other California cities with a full directory, by the number of active practitioners listed in NPPES.

How San Marcos compares with the U.S.

Compared with the U.S. as a whole, San Marcos has more Dentists (1.7x) and Chiropractors (1.4x) per 100,000 residents.

It has fewer clinicians in Internal Medicine (40% of the U.S. rate), Physician Assistants (56%) and Occupational Therapists (60%) per 100,000 residents.

San Marcos has 2,098 active clinicians per 100,000 residents, compared with 2,198 for the U.S.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

92% of clinicians in San Marcos listed in the CMS Medicare file (266 of 290) accept Medicare assignment. That is similar to the California share of 91%.

Only 290 of 1,991 active clinicians in San Marcos appear in the CMS Medicare file, so this share describes that smaller group.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

22% of clinicians in San Marcos listed in the CMS Medicare file (65 of 290) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the California share of 28%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

San Marcos CMS Healthcare & Financial Disclosures

CMS Part D Prescribers (2024), Open Payments (program year 2025), Medicare (PECOS) enrollment and Part B (2024) data for San Marcos, CA

Source: CMS public datasets

Healthcare operations in San Marcos, CA encompass 1,991 active individual practitioners and 371 registered medical facilities across 143 clinical specialties.

According to CMS Medicare Part D analytics for 2024, prescription drug volume in San Marcos accounts for $26.6 Million across 234,469 prescription claims. 500 local practitioners have a Medicare (PECOS) enrollment record. Open Payments data for program year 2025 list $0.1 Million in payments reported by companies to 209 local practitioners; a reported payment does not necessarily mean the financial relationship is improper.

Medicare Part D Prescriptions (2024) $26.6M 234,469 Prescription Claims Source: data.cms.gov
Open Payments Sunshine Act (2025) $0.1M 209 Recipients Disclosed A reported payment does not necessarily mean the financial relationship is improper. Source: openpaymentsdata.cms.gov
Medicare (PECOS) Enrollment 500 Enrolled Medicare Practitioners Source: data.cms.gov
Medicare Part B Allowed Volume (2024) $13.7M 313,718 Services Performed Source: data.cms.gov

CMS PECOS: Eligible to Order or Refer for Medicare in San Marcos

Part B Lab & Imaging Eligible: 347
Durable Medical Equipment (DME): 359
Home Health Agency (HHA): 272
Source: CMS Order and Referring