Jennifer M. Van Warmerdam, MD

Medicare activity in 2024

Official CMS public-use data for Jennifer M. Van Warmerdam, 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. Hyaluronan or derivative, synvisc or synvisc-one, for intra-articular injection, 1 mg (J7325)4,945 services
2. Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)1,102 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)341 services
4. Aspiration and/or injection of fluid from large joint (20610)220 services
5. X-ray of knee, 4 or more views (73564)135 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%
• Arthritis75%
• Diabetes29%
• Depression25%
• Anxiety20%

Hospitals where Jennifer M. Van Warmerdam works

Medicare's Facility Affiliation Data lists Jennifer M. Van Warmerdam 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.

• California Pacific Medical Center- Van Ness CampusSan Francisco, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050047
• Marinhealth Medical CenterGreenbrae, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050360
• Sonoma Valley HospitalSonoma, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050090
• UCSF Health Stanyan HospitalSan Francisco, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050457
• 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 Jennifer M. Van Warmerdam is enrolled with Medicare (CMS data updated October 2, 2026).

• 1 Shrader St, Suite 650San Francisco, CA 94117 (855) 581‑3442
• 400 Parnassus AveSan Francisco, CA 94143
• 450 Stanyan StSan Francisco, CA 94117 (415) 750‑5750

Group practices

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

• UCSF Medical Group Business Services1,598 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in California →

Other orthopedic surgeons in San Francisco

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

• David Yeroushalmi, MD
• Andrew Romero, MD
• Gordon C. Lundy, MD
• Andrew John, MD
• Kirstina M. Olson, MD
• Sigurd Berven, MD
• Rayshad Oshtory, MD
• Nicole S. Schroeder, MD

All orthopedic surgeons in San Francisco →

Other clinicians in UCSF Medical Group Business Services

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

• Aaron D. Tward
• Tej D. Azad, MD
• Natalia Wagner, NP
• Rana Rand, DO
• Matilda F. Chan, MD
• Shannon Kelly, MD

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