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Healthcare Providers & Facilities in Downey, CA

Public healthcare directory of 3,631 individual practitioners and 575 healthcare facilities located in Downey, California.

3,631 Practitioners
575 Facilities
210 Specialties

Medical Specialties in Downey

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

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All Specialties in Downey

Specialties with enough public records for a comparison with U.S. figures, besides those named above, plus the 60 largest of 187 more with at least one listed practitioner. Number of practitioners in brackets.

Chiropractic Providers

Dietary & Nutritional Service Providers

Eye and Vision Services Providers

Nursing Service Related Providers

Podiatric Medicine & Surgery Service Providers

Featured Healthcare Providers in Downey

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

Dr. Mark Talavera , MD

Internal Medicine

Medicare Accepted
11525 Brookshire Ave, Downey, CA
Phone: 5628694497
NPI 1104991090

Ariana Neddermann , FNP-C

Nurse Practitioner - Family

Medicare Accepted
11525 Brookshire Ave Ste 202, Downey, CA
Phone: 5628691201
NPI 1548049471

Dr. Jorge Ramirez Amaya , MD

Family Medicine

Medicare Accepted
9449 Imperial Hwy Ste D133, Downey, CA
Phone: 5626572857
NPI 1184795007

Dr. Michael Huoh , MD

Physical Medicine & Rehabilitation

Medicare Accepted
9353 Imperial Hwy Fl 4, Downey, CA
Phone: 5626572424
NPI 1164602728

Kevin Oei

Family Medicine

Medicare Accepted
11500 Brookshire Ave, Downey, CA
Phone: 5629045000
NPI 1063816809

Dr. Simon Lavi , DO

Orthopaedic Surgery - Orthopaedic Trauma

7700 Imperial Hwy, Downey, CA
Phone: 5628030600
NPI 1124120092

Largest Cities in California

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

How Downey compares with the U.S.

Compared with the U.S. as a whole, Downey has more clinicians in Nurse Practitioner - Primary Care (3.3x), clinicians in Internal Medicine - Hematology & Oncology (3.0x) and Pharmacists (2.6x) per 100,000 residents.

It has fewer clinicians in Student in an Organized Health Care Education/Training Program (67% of the U.S. rate) and Nurse Practitioners (72%) per 100,000 residents.

Downey has 3,273 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.

93% of clinicians in Downey listed in the CMS Medicare file (454 of 487) accept Medicare assignment. That is similar to the California share of 91%.

Only 487 of 3,631 active clinicians in Downey 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.

19% of clinicians in Downey listed in the CMS Medicare file (94 of 487) 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).

Downey CMS Healthcare & Financial Disclosures

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

Source: CMS public datasets

Healthcare operations in Downey, CA encompass 3,631 active individual practitioners and 575 registered medical facilities across 210 clinical specialties.

According to CMS Medicare Part D analytics for 2024, prescription drug volume in Downey accounts for $105.6 Million across 783,752 prescription claims. 848 local practitioners have a Medicare (PECOS) enrollment record. Open Payments data for program year 2025 list $0.5 Million in payments reported by companies to 340 local practitioners; a reported payment does not necessarily mean the financial relationship is improper.

Medicare Part D Prescriptions (2024) $105.6M 783,752 Prescription Claims Source: data.cms.gov
Open Payments Sunshine Act (2025) $0.5M 340 Recipients Disclosed A reported payment does not necessarily mean the financial relationship is improper. Source: openpaymentsdata.cms.gov
Medicare (PECOS) Enrollment 848 Enrolled Medicare Practitioners Source: data.cms.gov
Medicare Part B Allowed Volume (2024) $22.1M 239,716 Services Performed Source: data.cms.gov

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

Part B Lab & Imaging Eligible: 661
Durable Medical Equipment (DME): 685
Home Health Agency (HHA): 619
Source: CMS Order and Referring