Dr. Jamal Julian Zaka, MD

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

• Contra Costa Regional Medical Center Hospital · Martinez, CA
• John Muir Medical Center - Concord Campus Hospital · Concord, CA · listed as John Muir Medical Ctr Concord Campus
• John Muir Medical Center - Walnut Creek Campus Hospital · Walnut Creek, CA

Colleagues at Bass Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 292 clinicians in the practice; 12 are shown here.

• Mrs. Joy Marie Ackles, FNP Family Nurse Practitioner · Chico, CA
• Anuja Bista Family Nurse Practitioner · Pleasanton, CA
• Dr. Kuang-Hwa Kenneth Chao, MD Radiation Oncology Physician · Walnut Creek, CA
• Eman Elmi, DPM Foot & Ankle Surgery Podiatrist · Walnut Creek, CA
• Shayan Essapoor Podiatrist · Walnut Creek, CA
• Dr. Rusna K Jhita, MD Obstetrics & Gynecology Physician · Walnut Creek, CA
• Dr. Dawud Omar Lankford, MD Urology Physician · Oakland, CA
• Virginia Y Lieu, MD Orthopaedic Trauma Physician · Castro Valley, CA
• Dr. Kalyani Maganti, MD Gastroenterology Physician · Concord, CA
• Danielle Lynn Nack, DPM Podiatrist · Mankato, MN
• Dr. Madhavi Durga Vemulapalli, MD Obstetrics & Gynecology Physician · Walnut Creek, CA
• Alana Suzanne Yahiro Leibowitz Ambulatory Fertility Facility · Walnut Creek, CA

Other providers in Walnut Creek

• Dr. Ka Ling (Karin) Cheung, MD

  Individual Pulmonary Disease Physician · NPI 1881643831

  2637 Shadelands Dr, Walnut Creek, CA 94598-2512 · (925) 944-0166

• Dr. Michael L. Cohen, MD

  Individual Pulmonary Disease Physician · NPI 1205885779

  130 La Casa Via Bldg #2 Ste 208, Walnut Creek, CA 94598-3045 · (925) 944-0166

• Dr. Kristina Kramer, MD

  Individual Pulmonary Disease Physician · NPI 1598714511

  2637 Shadelands Dr, Walnut Creek, CA 94598-2512 · (925) 932-6330

• Dr. Jigar Patel, MD, MPH

  Individual Pulmonary Disease Physician · NPI 1356699417

  2700 Ygnacio Valley Rd Ste 100, Walnut Creek, CA 94598-3462 · (925) 939-3050