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Dr. Gregory D. Muller, DO

Emergency Medicine (Emergency Medicine Physician)

300 Pasteur Dr
Stanford, CA 94305

Who else practices at this address →

Santa Clara County includes mental health (13% of residents) shortage areas. About shortage areas

Call (650) 723-4000

  • Medicare participating

At a glance

Years since graduation
7
In the NPI registry since
2018
Medicare patients seen, 2024
315

Licensed in California since 2022, according to the Osteopathic Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is

Education and training

  • 2018Registered with an NPI (national billing number; not a license date)

Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Emergency Medicine Physician primary
    CA license 20A19611 (first issued 2022; current)

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Emergency Medicine per capita by county →

Where they work

Hospitals

Medical groups

Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.

Medicare patients and services

Medicare patients, 2024
315
Services billed
425
Patients’ average age
75
Most frequent Medicare services, 2023
ServiceTimesPatients
Emergency department visit with high level of medical decision making158155
Emergency department visit with moderate level of medical decision making2626
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only1512

Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.

Other Emergency Medicine clinicians in Stanford

Sources

NPI registry (CMS NPPES, November 2026; record last updated March 23, 2024), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1790281616. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.