Endocrinologists in California
Data updated monthly · Last refresh October 2026
1,135 Endocrinology, Diabetes & Metabolism providers practice in California, including 586 (52%) offering telehealth. The largest concentration is in Los Angeles. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
1,135providers
586telehealth
Los Angelestop city
Endocrinology, Diabetes & Metabolism by city in California
Choose a city to see providers there.
| Endocrinology, Diabetes & Metabolism in Los Angeles | 107 providers |
| Endocrinology, Diabetes & Metabolism in San Francisco | 78 providers |
| Endocrinology, Diabetes & Metabolism in San Diego | 66 providers |
| Endocrinology, Diabetes & Metabolism in Sacramento | 41 providers |
| Endocrinology, Diabetes & Metabolism in Torrance | 34 providers |
| Endocrinology, Diabetes & Metabolism in Stanford | 31 providers |
| Endocrinology, Diabetes & Metabolism in Santa Monica | 22 providers |
| Endocrinology, Diabetes & Metabolism in Long Beach | 20 providers |
| Endocrinology, Diabetes & Metabolism in La Jolla | 20 providers |
| Endocrinology, Diabetes & Metabolism in Fresno | 20 providers |
| Endocrinology, Diabetes & Metabolism in Beverly Hills | 17 providers |
| Endocrinology, Diabetes & Metabolism in Newport Beach | 16 providers |
| Endocrinology, Diabetes & Metabolism in San Jose | 16 providers |
| Endocrinology, Diabetes & Metabolism in Mountain View | 15 providers |
| Endocrinology, Diabetes & Metabolism in Palo Alto | 15 providers |
| Endocrinology, Diabetes & Metabolism in Bakersfield | 13 providers |
| Endocrinology, Diabetes & Metabolism in Orange | 13 providers |
| Endocrinology, Diabetes & Metabolism in Roseville | 12 providers |
| Endocrinology, Diabetes & Metabolism in Walnut Creek | 12 providers |
| Endocrinology, Diabetes & Metabolism in Fullerton | 12 providers |
| Endocrinology, Diabetes & Metabolism in Santa Barbara | 12 providers |
| Endocrinology, Diabetes & Metabolism in Mission Viejo | 11 providers |
| Endocrinology, Diabetes & Metabolism in Duarte | 11 providers |
| Endocrinology, Diabetes & Metabolism in Irvine | 11 providers |
Where Endocrinologists in California practice
From CMS Medicare enrollment records covering 765 of the 1,135 providers listed here (67%). Providers who do not bill Medicare are not included in these figures.
18%solo or small practice (under 10 clinicians)
8%mid-size group (10 to 99)
74%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Endocrinologists | All clinicians in group | Main city |
| Sutter Bay Medical Foundation | 54 | 3,783 | Palo Alto |
| The Regents of the University of California | 52 | 1,426 | Santa Monica |
| Southern California Permanente Medical Group | 40 | 11,250 | San Diego |
| Permanente Medical Group Inc. | 31 | 10,928 | Roseville |
| Stanford Health Care | 27 | 3,152 | Stanford |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Endocrinologists affiliated |
| Ronald Reagan UCLA Medical Center | Los Angeles | Government | 4 of 5 | 57 |
| Stanford Health Care | Stanford | Nonprofit | 5 of 5 | 56 |
| Santa Monica - UCLA Med Ctr & Orthopaedic Hospital | Santa Monica | Nonprofit | 5 of 5 | 45 |
| Hoag Memorial Hospital Presbyterian | Newport Beach | Nonprofit | 5 of 5 | 44 |
| Sutter Medical Center, Sacramento | Sacramento | Nonprofit | 4 of 5 | 37 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Endocrinology, Diabetes & Metabolism providers in California
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Aleem Syed, MDAnaheim, CA · $1,246 in drug and device payments (2025) · Telehealth ·
(714) 533-0300 Dr. Lilli Ann Cellona M D A Medical, M.D.Anaheim, CA · $106 in drug and device payments (2025) · Telehealth ·
(714) 974-0100 Dr. Sara AhmedAnaheim, CA · $1,067 in drug and device payments (2025) · Telehealth ·
(714) 533-0300 Dr. Wai Ping Li, D.O.Anaheim, CA · No drug or device payments recorded (2025) ·
(714) 254-2782 Dr. Ivan Martinez, M.D.Anaheim Hills, CA · $1,256 in drug and device payments (2025) ·
(714) 974-1717 Dr. Hla Win, M.DAntioch, CA · $19 in drug and device payments (2025) · Telehealth ·
(925) 813-3101 Dr. Sanna Fatima, M.D.Antioch, CA · $138 in drug and device payments (2025) · Telehealth ·
(925) 513-2483 Dr. Anand Gandhi, MDApple Valley, CA · $1,029 in drug and device payments (2025) · Telehealth ·
(760) 810-0888 Dr. Nirmal Banskota, M.D. Dr. Thomas Huang, M.D.Arcadia, CA · No drug or device payments recorded (2025) · Telehealth ·
(626) 462-1884 Dr. Michael Ashcraft, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 889-0872 Dr. Arline Yen, M.D.Bakersfield, CA · No drug or device payments recorded (2025) · Telehealth ·
(617) 505-1520 Dr. Harshit Shah, M.DBakersfield, CA · $196 in drug and device payments (2025) · Telehealth ·
(661) 327-1431 Dr. Htet Htet Win, M.D.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 398-3060 Dr. Jasleen Duggal, M.D.Bakersfield, CA · $30,335 in drug and device payments (2025) · Telehealth ·
(661) 748-1999 Dr. Nelson Madrilejo, MDBakersfield, CA · $2,022 in drug and device payments (2025) · Telehealth ·
(661) 326-8989 Dr. Niyoti Reddy, M.D.Bakersfield, CA · $27 in drug and device payments (2025) · Telehealth ·
(617) 505-1520 Dr. Robert Catania, M.D.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 322-2413 Dr. Ronakkumar Patel, M.DBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 398-5088 Dr. Roxanne Aquino, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(800) 353-5400 Dr. Sangeeta Chandramahanti, MD.Bakersfield, CA · $689 in drug and device payments (2025) · Telehealth ·
(661) 326-2000 Dr. Sang Hun Han, MDBakersfield, CA · $194 in drug and device payments (2025) ·
(833) 678-2781 Dr. Sukhmani Singh, MDBakersfield, CA · $766 in drug and device payments (2025) · Telehealth ·
(661) 327-8538 Dr. Victor Ettinger, M.D.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 840-9270 Dr. Brad Kimura, MDBaldwin Park, CA · $257 in drug and device payments (2025) ·
(833) 574-2273 Dr. Eloy Suarez, MDBaldwin Park, CA · No drug or device payments recorded (2025) ·
(626) 851-1011 Dr. Jenny Zhang-turner, M.D.Baldwin Park, CA · No drug or device payments recorded (2025) ·
(626) 851-1011 Dr. Jill Kunitake, MDBaldwin Park, CA · No drug or device payments recorded (2025) ·
(626) 851-1011 Dr. Agnes Szekeres, MDBellflower, CA · No drug or device payments recorded (2025) ·
(562) 461-3000 Dr. Anna Arteaga Garcia, NPBellflower, CA · No drug or device payments recorded (2025) ·
(323) 787-8150 Dr. Bonnie Johnson, MDBellflower, CA · No drug or device payments recorded (2025) ·
(562) 461-3000 Dr. Honorata Oktay, MDBellflower, CA · No drug or device payments recorded (2025) ·
(562) 461-3000 Dr. Manuel Fernandez, MDBellflower, CA · No drug or device payments recorded (2025) ·
(562) 461-3000 Dr. Xiaodan Qu, MDBellflower, CA · No drug or device payments recorded (2025) · Telehealth ·
(562) 461-3000 Dr. Thein Kyaw, MDBell Gardens, CA · $29 in drug and device payments (2025) ·
(562) 927-1307 Dr. Christina Kwan, MDBerkeley, CA · $263 in drug and device payments (2025) · Telehealth ·
(510) 204-8140 Dr. Jane Snow, M.DBerkeley, CA · No drug or device payments recorded (2025) ·
(510) 507-4401 Dr. Ji Chae, M.D. MPHBerkeley, CA · $720 in drug and device payments (2025) · Telehealth ·
(510) 985-5020 Dr. Ronald Krauss, MDBerkeley, CA · $119 in drug and device payments (2025) · Telehealth ·
(510) 665-0500 Dr. Albert Shamouelian, MDBeverly Hills, CA · $3,927 in drug and device payments (2025) · Telehealth ·
(310) 652-5292 Dr. Amit Sumal, MDBeverly Hills, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 855-7002 Dr. Anne Peters, M.D.Beverly Hills, CA · $3,130 in drug and device payments (2025) · Telehealth ·
(310) 272-8222 Dr. David Aftergood, MDBeverly Hills, CA · $4,449 in drug and device payments (2025) · Telehealth ·
(310) 659-8824 Dr. Dina Block, M.D.Beverly Hills, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 272-8222 Dr. Eva Cwynar, MDBeverly Hills, CA · $822 in drug and device payments (2025) ·
(310) 271-5438 Dr. Julia Sladek, M.D.Beverly Hills, CA · No drug or device payments recorded (2025) ·
(310) 657-1780 Dr. Lisa Moore, M.D.Beverly Hills, CA · $213 in drug and device payments (2025) · Telehealth ·
(310) 423-0550 Dr. Natasha Malkani, MDBeverly Hills, CA · $118 in drug and device payments (2025) · Telehealth ·
(310) 248-6840 Conditions Endocrinology, Diabetes & Metabolism providers in California commonly treat
Patients often search by condition rather than specialty. These are conditions typically managed by Endocrinology, Diabetes & Metabolism providers. Individual practices vary, so confirm with the provider before booking.
- Type 2 diabetes
- Thyroid disorders
- Osteoporosis
- Hormone imbalance
- Type 1 diabetes
Common questions
How many Endocrinology, Diabetes & Metabolism providers are in California?There are 1,135 Endocrinology, Diabetes & Metabolism providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Endocrinology, Diabetes & Metabolism providers in California offer telehealth?Yes. 586 of the 1,135 Endocrinology, Diabetes & Metabolism providers in California (about 52%) report offering telehealth services in CMS data.
Which cities in California have the most Endocrinology, Diabetes & Metabolism providers?Los Angeles (107), San Francisco (78), San Diego (66) have the highest concentration of Endocrinology, Diabetes & Metabolism providers in California.
How many Endocrinology, Diabetes & Metabolism providers in California received drug or device company payments?615 of 1,135 Endocrinology, Diabetes & Metabolism providers in California (54%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
What conditions do Endocrinology, Diabetes & Metabolism providers in California treat?Endocrinology, Diabetes & Metabolism providers commonly treat type 2 diabetes, thyroid disorders, osteoporosis, hormone imbalance, type 1 diabetes and related conditions. Individual practices vary, so confirm with the provider before booking.
Where does this data come from?Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
Do most Endocrinologists in California work in independent practices or large health systems?Among 765 Endocrinologists in California enrolled in Medicare, 18% bill through a solo or small practice with fewer than 10 clinicians, 8% through a mid-size group of 10 to 99, and 74% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Endocrinologists in California work at?According to CMS facility affiliation records, the California hospitals where the most Endocrinologists hold privileges are Ronald Reagan UCLA Medical Center in Los Angeles; Stanford Health Care in Stanford; Santa Monica - UCLA Med Ctr & Orthopaedic Hospital in Santa Monica.
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