Robert William Weber, MD
Hematology & Oncology Physician · Daly City, CA
Robert William Weber, MD is a hematology & oncology physician with a practice address in Daly City, California, and NPI 1265505291, issued on Nov 16, 2006. Check the license (California G72551, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert William Weber
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- G72551 CA
G072551 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1800 Sullivan Ave, Daly City, CA 94015
- Phone
- (415) 337-2121
- Enumerated
- Nov 16, 2006
- Record last updated
- Jul 21, 2022
- Fax
- (415) 337-1247
- Medicaid IDs
- 00G725510 CA
00G7255102 CA - Medicare enrollment
- Enrolled (PECOS I20080128000261); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 1800 Sullivan Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Peter Brion, M.D.Pulmonary Disease Physician1801896311
- Charlene Mae BuenoPhysical Therapist1376027201
- Pedro Cajator, MEDICAL DOCTORFamily Medicine Physician1215932793
Verify Robert William Weber in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G72551Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,308 Medicare Part D claims for 257 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 36 claims were for opioids.
Most prescribed
- Anastrozole254 claims
- Imbruvica76 claims
- Hydroxyurea67 claims
- Tagrisso54 claims
- Eliquis45 claims
- Letrozole38 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $34,937.37
234 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Dignity HealthSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert William Weber among 1,583 hematology & oncology physician records in California
Robert William Weber, MD is one of 1,583 hematology & oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1990 · median 2003 among the 1,124 with a school on file
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Daly City → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Monica Grova, MDBurlingame, CA 940101265866487
- Richard Schwartz, M.D.Burlingame, CA 940101255679205
- Juliet Kral, MDMenlo Park, CA 940251225046188
- Arun Kumar Arumugam Raajasekar, MDMountain View, CA 940401801143722
- James Heckmann, MDMountain View, CA 940401487660023
- Jiali Li, M.D., PH.DMountain View, CA 940401396981445
- Derrick Wong, M.D.Mountain View, CA 940401194941104
- Hanhsing Wu, MDMountain View, CA 940401114034832
Common questions
What is Robert William Weber, MD's NPI number?
Robert William Weber, MD's National Provider Identifier (NPI) is 1265505291, issued on Nov 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert William Weber, MD located?
The NPPES record lists a practice address at 1800 Sullivan Ave, Daly City, CA, 94015. Phone: (415) 337-2121. Providers update this record themselves, so call before visiting.
How can I verify Robert William Weber, MD's license?
NPPES lists California license number G72551, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert William Weber, MD prescribe under Medicare Part D?
In 2024, Robert William Weber, MD had 1,308 Medicare Part D claims for 257 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.