Alex Metzger, M.D.
NPI 1821070590 · Hematology & Oncology Physician · Greenbrae, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alex Metzger, M.D. is a Hematology & Oncology Physician provider in Greenbrae, CA (NPI 1821070590).
Provider details
- NPI number
- 1821070590
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A79556 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,010 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 576 | $143 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 453 | $199 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 332 | $17 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 321 | $162 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 274 | $19 |
| Administration of Hormonal Anti-Neoplastic Chemotherapy Under Skin Or Into Muscle96402 | 223 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 244 | 52 |
| Abiraterone Acetate | 226 | 42 |
| Acyclovir | 83 | 21 |
| Hydroxyurea | 81 | 16 |
| Apixabanbrand: Eliquis | 65 | — |
| Enzalutamidebrand: Xtandi | 50 | — |
| Relugolixbrand: Orgovyx | 42 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$57 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-17
- Last updated
- 2007-07-08
Frequently asked questions
- What is Alex Metzger's NPI number?
- Alex Metzger's National Provider Identifier (NPI) is 1821070590, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alex Metzger's specialty?
- Alex Metzger is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Alex Metzger located?
- Alex Metzger's practice location on file with NPPES is 1350 S Eliseo Dr, Greenbrae, CA 94904-2011.
- What is Alex Metzger's phone number?
- The practice phone number listed in the NPPES registry for Alex Metzger is (415) 925-5000.
- Does Alex Metzger accept Medicare?
- Alex Metzger is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alex Metzger's NPI active?
- Yes — Alex Metzger's NPI (1821070590) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.