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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ROBERT WILLIAM WEBER MD
NPI 1265505291
Internal Medicine - Hematology & Oncology in Daly City, CA

Active since November 16, 2006PECOS EnrolledAccepts Medicare Assignment
1800 SULLIVAN AVE RM 603, DALY CITY, CA 94015(415) 337-2121 Get Directions Write a Review

NPPES record last updated: October 12, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 12, 2026, Jul 21, 2022, Jul 6, 2017 (3 updates tracked since 2017).

About Robert William Weber Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ROBERT WILLIAM WEBER MD (NPI 1265505291) is an individual hematology & oncology provider in Daly City, California, licensed in California (G72551) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Daly City, and is a graduate of Other (1990).

NPPES Registry Identity

NPI1265505291
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameROBERT WILLIAM WEBERCredential: MD
Location Address1800 SULLIVAN AVE RM 603Daly City, CA 94015-2226
Mailing Address1800 Sullivan Ave Rm 603Daly City, CA 94015-2226 · (415) 337-2121 · Fax (415) 337-1247
Phone(415) 337-2121
Sole ProprietorNo
Medical School CMSOtherGraduated 1990
Enumeration DateNovember 16, 2006
Last NPPES UpdateOctober 12, 20263 updates tracked since enumeration
NPPES CertifiedOctober 12, 2026
✔ NPI 1265505291 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Licenses✔ Licensed in CA · G72551✔ Licensed in CA · G072551
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
1800 SULLIVAN AVE RM 603, Daly City, CA 94015
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Secondary Practice Location 1

Location 11800 Sullivan Ave, Suite 603Daly City, CA 94015-2225 · Phone (415) 337-2121 · Fax (415) 337-1247

Other Identifiers 2

Medicaid00G725510CA
Medicaid00G7255102CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Robert William Weber Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID840372066
PECOS Enrollment IDI20080128000261
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Robert Weber reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

R W Weber MD A Medical Corporation
Same address
Hematology & Oncology
1800 SULLIVAN AVE RM 603
Daly City, CA 94015
  • Reassigned Medicare billing, California enrollment
NPI 1881184026 (415) 337-2121
Ucsf Health Community Hospitals
6.5 mi
Clinic/Center
2235 HAYES ST, 5TH FLOOR
San Francisco, CA 94117
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Dignity Health
  • 38 clinicians in this Medicare group
NPI 1780727792 (415) 688-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 11

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
657 services301 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
170 services101 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
165 services41 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
51 services24 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
40 services40 patients
Telephone medical discussion with physician, 21-30 minutes 99443
This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.
28 services21 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94015 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Capecitabine, oral, 500 mg J8521
Treatment-Treatment - Miscellaneous · category RX029N
9 suppliers54 claims4,140 services$0.69 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
10 suppliers34 claims34 services$18.92 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
5 suppliers22 claims22 services$12.62 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

R W WEBER MD A MEDICAL CORPORATION
Internal Medicine (Hematology & Oncology)
1800 SULLIVAN AVE RM 603
DALY CITY, CA 94015
San Mateo County (415) 337-2121

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Robert Weber's NPI number?

The NPI number for Robert Weber is 1265505291. It was assigned to this individual provider in the NPPES registry on November 16, 2006.

Where is Robert Weber located?

Robert Weber practices at 1800 Sullivan Ave Rm 603, Daly City, CA 94015. The listed phone number is (415) 337-2121.

What is Robert Weber's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Robert Weber enrolled in Medicare?

Yes. Robert Weber is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Robert Weber's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Weber reassigns Medicare benefits to 2 organizations: R W Weber MD A Medical Corporation (Daly City, CA) and Ucsf Health Community Hospitals (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Robert Weber's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Robert Weber was last updated on October 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.