DR. BROCK ALAN WEBSTER MACDONALD M.D.
NPI 1689901506
Internal Medicine - Gastroenterology in San Francisco, CA
About Dr. Brock Alan Webster Macdonald M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. BROCK ALAN WEBSTER MACDONALD M.D. (NPI 1689901506) is an individual gastroenterology provider in San Francisco, California, licensed in California (A102304) and active in the NPI registry since November 2009. He is enrolled in Medicare PECOS and is a graduate of Columbia University College Of Physicians And Surgeons (2004).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Brock Alan Webster Macdonald M.d. 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.
Medicare Billing Reassignment
Medicare enrollment records show Brock Macdonald reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94116
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94117 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94117
SAN FRANCISCO, CA 94117
SAN FRANCISCO, CA 94117
SAN FRANCISCO, CA 94117
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 Brock Macdonald's NPI number?
The NPI number for Brock Macdonald is 1689901506. It was assigned to this individual provider in the NPPES registry on November 13, 2009.
Where is Brock Macdonald located?
Brock Macdonald practices at 350 Parnassus Ave S-357, San Francisco, CA 94117. The listed phone number is (415) 476-2777.
What is Brock Macdonald's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Brock Macdonald enrolled in Medicare?
Yes. Brock Macdonald 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 organization bills Medicare for Brock Macdonald's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brock Macdonald reassigns Medicare benefits to Permanente Medical Group Inc (San Francisco, CA). The 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 Brock Macdonald'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 Brock Macdonald was last updated on December 15, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. Brock Alan Webster Macdonald, M.D. · NPI 1689901506
Gastroenterology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since November 13, 2009.
## Identity
- **NPI:** 1689901506 (Entity type: Individual)
- **Enumerated:** November 13, 2009
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** A102304 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 350 PARNASSUS AVE, S-357, San Francisco, CA 94117-3608
- **Phone:** (415) 476-2777
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1841373800, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Columbia University College Of Physicians And Surgeons, class of 2004
## Record status
- **NPPES last updated:** December 15, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1689901506) · Data from the CMS NPPES public registry.