R W WEBER MD A MEDICAL CORPORATION
NPI 1881184026
Internal Medicine - Hematology & Oncology in Daly City, CA

Q: What is R W Weber MD A Medical Corporation's NPI number?

The NPI number for R W Weber MD A Medical Corporation is 1881184026. It was assigned to this organization in the NPPES registry on May 14, 2018.

Q: What is R W Weber MD A Medical Corporation's specialty?

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

Active since May 14, 2018

1800 SULLIVAN AVE RM 603, DALY CITY, CA 94015(415) 337-2121 Get Directions Write a Review

NPPES record last updated: September 6, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 6, 2024, May 14, 2018 (2 updates tracked since 2018).

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About R W Weber Md A Medical Corporation NPPES

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

R W WEBER MD A MEDICAL CORPORATION (NPI 1881184026) is a healthcare organization registered as a hematology & oncology in Daly City, California and active in the NPI registry since May 2018. The organization maintains a secondary practice location in San Francisco and lists Robert William Weber, Owner, as its authorized official.

NPPES Registry Identity

NPI1881184026

Entity TypeOrganization

Primary Taxonomy207RH0003X

Legal Business NameR W WEBER MD A MEDICAL CORPORATION

Location Address1800 SULLIVAN AVE RM 603Daly City, CA 94015-2226

Mailing Address5758 Geary Blvd # 440San Francisco, CA 94121-2112 · (415) 337-2121

Phone(415) 337-2121

Organization SubpartNo

Authorized OfficialRobert William WeberOwner · (415) 337-2121

Enumeration DateMay 14, 2018

Last NPPES UpdateSeptember 6, 20242 updates tracked since enumeration

NPPES CertifiedSeptember 6, 2024

✔ NPI 1881184026 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0003X

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 12250 Hayes St Ste 111CSan Francisco, CA 94117-1078 · Phone (415) 750-5660

Other Identifiers 1

OtherG72551CA · Medical License

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X MULTIPLE SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

R W Weber Md A Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to R W Weber MD A Medical Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Robert Weber, MD

Hematology/Oncology

NPI 1265505291

1800 SULLIVAN AVE RM 603
Daly City, CA 94015

(415) 337-2121

✔ PECOS✔ Accepts MedicareSame address

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

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 R W Weber MD A Medical Corporation's NPI number?

The NPI number for R W Weber MD A Medical Corporation is 1881184026. It was assigned to this organization in the NPPES registry on May 14, 2018.

Where is R W Weber MD A Medical Corporation located?

R W Weber MD A Medical Corporation is located at 1800 Sullivan Ave Rm 603, Daly City, CA 94015. The listed phone number is (415) 337-2121.

What is R W Weber MD A Medical Corporation's specialty?

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

Is R W Weber MD A Medical Corporation enrolled in Medicare?

Yes. R W Weber MD A Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through R W Weber MD A Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Hematology/Oncology) reassigns their Medicare billing to R W Weber MD A Medical Corporation. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for R W Weber MD A Medical Corporation was last updated on September 6, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.