Jennifer A. Tremmel, MD

Medicare activity in 2024

Official CMS public-use data for Jennifer A. Tremmel, 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. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)158 services
2. Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)129 services
3. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)77 services
4. Insertion of tube in coronary artery for diagnosis with review by radiologist (93454)73 services
5. Ultrasound evaluation of heart blood vessel or graft with review by radiologist, initial vessel (92978)65 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 disease69%
• Arthritis39%
• Heart failure39%
• Diabetes38%

Hospitals where Jennifer A. Tremmel works

Medicare's Facility Affiliation Data lists Jennifer A. Tremmel 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.

• Community Hospital of the Monterey PeninsulaMonterey, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050145
• El Camino HealthMountain View, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050308
• Stanford Health CareStanford, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050441
• Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050283

Practice locations

Addresses where Jennifer A. Tremmel is enrolled with Medicare (CMS data updated October 2, 2026).

• 300 Pasteur DrStanford, CA 94305 (650) 723‑4000

Group practices

Medicare enrollment lists Jennifer A. Tremmel as a member of this group (CMS data updated October 2, 2026).

• Stanford Health Care3,122 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary

Find other Cardiovascular Disease (Cardiology) doctors in California →

Other cardiologists in Stanford

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

• Chad S. Weldy, MD
• Rahul P. Sharma
• Suzanne Oskouie, MD
• Jessica Mega, MD
• Albert J. Rogers, MD
• Bruna Filipa Gomes Botelho Quintas, MD
• Mehak Dhande, MD
• Euan A. Ashley, MD

All cardiologists in Stanford →

Other clinicians in Stanford Health Care

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

• Hans-Christoph Becker, MD
• Alla Yarmosh, MD
• Odette A. Harris, MD
• Guido A. Davidzon, MD
• Hsiang-Hua Hung, MD
• Michelle Boogard, CNA

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