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Healthcare Providers & Facilities in Hercules, CA

Public healthcare directory of 281 individual practitioners and 52 healthcare facilities located in Hercules, California.

281 Practitioners
52 Facilities
59 Specialties

Medical Specialties in Hercules

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

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All Specialties in Hercules

Specialties with enough public records for a comparison with U.S. figures, besides those named above, plus 58 more with at least one listed practitioner. Number of practitioners in brackets.

Chiropractic Providers

Eye and Vision Services Providers

Nursing Service Related Providers

Physician Assistants & Advanced Practice Nursing Providers

Speech, Language and Hearing Service Providers

Featured Healthcare Providers in Hercules

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

Dr. Thang Nguyen , DDS

Dentist - General Practice

500 Alfred Nobel Dr Ste 285, Hercules, CA
Phone: 5107417041
NPI 1902958044
500 Alfred Nobel Dr Ste 240, Hercules, CA
Phone: 5107412140
NPI 1275654394

Dr. Janet Chan , OD

Optometrist

Medicare Accepted
500 Alfred Nobel Dr Ste 138, Hercules, CA
Phone: 5107241000
NPI 1356471205

Bogdan Ristic

Physician Assistant

139 Fremont Ct, Hercules, CA
Phone: 5103181537
NPI 1609463538

Wendy Mazursky , PA-C, MS

Physician Assistant

Medicare Accepted
500 Alfred Nobel Dr, Hercules, CA
Phone: 5107417418
NPI 1255425583

Amy Choy

Physician Assistant

600 Alfred Nobel Dr Ste A, Hercules, CA
Phone: 5109841111
NPI 1063822187

Largest Cities in California

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

How Hercules compares with the U.S.

Compared with the U.S. as a whole, Hercules has fewer Pharmacists (62% of the U.S. rate) per 100,000 residents.

Hercules has 1,068 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.

100% of clinicians in Hercules listed in the CMS Medicare file (16 of 16) accept Medicare assignment. That is higher than the California share of 91%.

Only 16 of 281 active clinicians in Hercules 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.

13% of clinicians in Hercules listed in the CMS Medicare file (2 of 16) 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).

Hercules CMS Healthcare & Financial Disclosures

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

Source: CMS public datasets

Healthcare operations in Hercules, CA encompass 281 active individual practitioners and 52 registered medical facilities across 59 clinical specialties.

According to CMS Medicare Part D analytics for 2024, prescription drug volume in Hercules accounts for $2.5 Million across 21,830 prescription claims. 33 local practitioners have a Medicare (PECOS) enrollment record. Open Payments data for program year 2025 list $0.0 Million in payments reported by companies to 18 local practitioners; a reported payment does not necessarily mean the financial relationship is improper.

Medicare Part D Prescriptions (2024) $2.5M 21,830 Prescription Claims Source: data.cms.gov
Open Payments Sunshine Act (2025) $0.0M 18 Recipients Disclosed A reported payment does not necessarily mean the financial relationship is improper. Source: openpaymentsdata.cms.gov
Medicare (PECOS) Enrollment 33 Enrolled Medicare Practitioners Source: data.cms.gov
Medicare Part B Allowed Volume (2024) $2.1M 24,416 Services Performed Source: data.cms.gov

CMS PECOS: Eligible to Order or Refer for Medicare in Hercules

Part B Lab & Imaging Eligible: 26
Durable Medical Equipment (DME): 26
Home Health Agency (HHA): 25
Source: CMS Order and Referring