Alex S. Metzger, MD

Medicare activity in 2024

Official CMS public-use data for Alex S. Metzger, 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. Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) (Q0138)15,810 services
2. Injection, denosumab, 1 mg (J0897)6,720 services
3. Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units (Q5106)3,080 services
4. Injection, dexamethasone sodium phosphate, 1 mg (J1100)2,886 services
5. Injection, palonosetron hcl, 25 mcg (J2469)1,160 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 pressure74%
• High cholesterol74%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)52%
• Arthritis41%
• Ischemic heart disease32%
• Chronic kidney disease27%

Hospitals where Alex S. Metzger works

Medicare's Facility Affiliation Data lists Alex S. Metzger 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 Alex S. Metzger is enrolled with Medicare (CMS data updated October 2, 2026).

• 1350 S Eliseo Dr, Suite 200Greenbrae, CA 94904 (415) 925‑5000

Group practices

Medicare enrollment lists Alex S. Metzger as a member of this group (CMS data updated October 2, 2026).

• Marin Cancer Care, Inc.13 clinicians in the group

Specialties

• Hematology/Oncologyprimary

Find other Hematology/Oncology doctors in California →

Other hematologist-oncologists in California

Clinicians with the same Medicare primary specialty in California — not a recommendation.

• Carling Ursem, MD
• Cyrus Mazidi, MD
• John M. Timmerman, MD
• Daniel Wu, MD
• Xuan Ge, MD
• Julian McLain, MD
• Meryl Colton, MD
• Dennis Hilliard

All hematologist-oncologists in California →

Other clinicians in Marin Cancer Care, Inc.

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

• Bobbie Head
• Barbara M. Galligan, MD
• Carling Ursem, MD
• Jennifer Chang, MD
• Kristin N. Anderson, MD
• Joseph C. Poen, 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