Quick answers
- Does Jeffrey R. Merz-Herrala accept Medicare assignment?
- Yes. Medicare's clinician data says Jeffrey R. Merz-Herrala accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Jeffrey R. Merz-Herrala's NPI number?
- 1619505120. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jeffrey R. Merz-Herrala works
Medicare's Facility Affiliation Data lists Jeffrey R. Merz-Herrala at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050454
- Zuckerberg San Francisco General Hospital & Trauma CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050228
Practice locations
Addresses where Jeffrey R. Merz-Herrala is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1001 Potrero AveSan Francisco, CA 94110 (628) 206‑5753
- 1600 Divisadero StSan Francisco, CA 94115 (415) 476‑1000
- 1635 Divisadero St, Suite 625 Box 1821San Francisco, CA 94143
- 2330 Post StSan Francisco, CA 94115 (415) 476‑4029
- 2500 Merced StSan Leandro, CA 94577 (510) 454‑1000
Group practices
Medicare enrollment lists Jeffrey R. Merz-Herrala as a member of these groups (CMS data updated October 2, 2026).
- Permanente Medical Group Inc10,996 clinicians in the group
- University of California San Francisco1,839 clinicians in the group
- University of California SFGH Medical Group587 clinicians in the group
- University Anesthesia Medical Group408 clinicians in the group
Specialties
- Emergency Medicineprimary
- Anesthesiologyalso
Other emergency medicine doctors in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Other clinicians in Permanente Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 2020 (6 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1619505120 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians