Elizabeth Marston, WHNP-BC

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.

• 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 John Muir Physician Network

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 486 clinicians in the practice; 12 are shown here.

• Dr. Christian A. Balzer, MD Internal Medicine Physician · Walnut Creek, CA
• Dr. Russell L Everest, MD Internal Medicine Physician · Walnut Creek, CA
• Sarah Gehrke, NP Ambulatory Care Registered Nurse · Concord, CA
• Dr. Lavinia Herbei, MD Internal Medicine Physician · Walnut Creek, CA
• Dr. Ethan D Hollander, MD Family Medicine Physician · San Ramon, CA
• Dr. Zita Reyes Latona, MD Family Medicine Physician · Martinez, CA
• Mr. Carleton Thomas Nibley, MD Cardiovascular Disease Physician · Concord, CA
• Dr. Nicole Kimberly Maria Nurse, DO General Practice Physician · Concord, CA
• Dr. Vandana Dutt Sharma, MD Rheumatology Physician · Walnut Creek, CA
• Tiffany Holcombe Svahn, MD Hematology & Oncology Physician · Pleasant Hill, CA
• Dr. Jianyu Xu, MD Endocrinology, Diabetes & Metabolism Physician · Concord, CA
• Jerry Z. Yang, MD Internal Medicine Physician · Martinez, CA

Other providers in Orinda

• Christine S Tsang, NP

  Individual Nurse Practitioner · NPI 1235332370

  12 Camino Encinas, Orinda, CA 94563-3304 · (510) 204-8171