Diana L. Tobler, MD

Medicare activity in 2024

Official CMS public-use data for Diana L. Tobler, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)130 services
2. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)101 services
3. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)101 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)63 services
5. Outpatient heart rehabilitation with electrocardiogram (ecg) monitoring, quality health care professional services (93798)54 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol75%
• Ischemic heart disease50%
• Atrial fibrillation43%
• Arthritis42%
• Heart failure34%

Hospitals where Diana L. Tobler works

Medicare's Facility Affiliation Data lists Diana L. Tobler 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.

• Marinhealth Medical CenterGreenbrae, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050360
• Novato Community HospitalNovato, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050131
• Sonoma Valley HospitalSonoma, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050090
• UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050454

Practice locations

Addresses where Diana L. Tobler is enrolled with Medicare (CMS data updated October 2, 2026).

• 505 Parnassus AveSan Francisco, CA 94143 (415) 476‑1000

Group practices

Medicare enrollment lists Diana L. Tobler as a member of this group (CMS data updated October 2, 2026).

• Regents Univ of California UCSF283 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary
• Internal Medicinealso

Find other Cardiovascular Disease (Cardiology) doctors in California →

Other cardiologists in San Francisco

Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.

• Elyse Foster, MD
• Binh An P. Phan, MD
• Bao G. Tran, MD
• Ramon A. Partida, MD
• Gary S. Huang, MD
• Mark Lebehn, MD
• George Adesina, MD
• Maria G. Sciammarella, MD

All cardiologists in San Francisco →

Other clinicians in Regents Univ of California UCSF

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Stephen R. Levinson, MD
• Brian Sebastian, MD
• Wanda Zhao, PA
• Rina Marfatia, MD
• Parisa Mehran, MD
• Susan C. Hollander, NP

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians