DR. JEFFREY ROTWEIN ZWEIG MD
NPI 1053600312
Internal Medicine - Hematology & Oncology in Pleasant Hill, CA
About Dr. Jeffrey Rotwein Zweig Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JEFFREY ROTWEIN ZWEIG MD (NPI 1053600312) is an individual hematology & oncology provider in Pleasant Hill, California, licensed in California (A136852) and active in the NPI registry since April 2011. He is enrolled in Medicare PECOS and is a graduate of Stanford University School Of Medicine (2018).
NPPES Registry Identity
Specialties & Licenses 3
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. Jeffrey Rotwein Zweig 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.
Medicare Billing Reassignments
2Medicare enrollment records show Jeffrey Zweig reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 810 clinicians in this Medicare group
Vallejo, CA 94589
- 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 94523 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 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PLEASANT HILL, CA 94523
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 Jeffrey Zweig's NPI number?
The NPI number for Jeffrey Zweig is 1053600312. It was assigned to this individual provider in the NPPES registry on April 7, 2011.
Where is Jeffrey Zweig located?
Jeffrey Zweig practices at 400 Taylor Blvd Ste 202, Pleasant Hill, CA 94523. The listed phone number is (925) 677-5041.
What is Jeffrey Zweig's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Jeffrey Zweig enrolled in Medicare?
Yes. Jeffrey Zweig 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 Jeffrey Zweig's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jeffrey Zweig reassigns Medicare benefits to 2 organizations: John Muir Trauma Physicians Billing Service (Walnut Creek, CA) and Permanente Medical Group Inc (Vallejo, 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 Jeffrey Zweig'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 Jeffrey Zweig was last updated on December 17, 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. Jeffrey Rotwein Zweig, MD · NPI 1053600312
Hematology & Oncology physician in Pleasant Hill, California. Individual provider, active in the CMS NPPES registry since April 7, 2011.
## Identity
- **NPI:** 1053600312 (Entity type: Individual)
- **Enumerated:** April 7, 2011
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** A136852 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 400 TAYLOR BLVD STE 202, Pleasant Hill, CA 94523-2163
- **Phone:** (925) 677-5041
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): John Muir Trauma Physicians Billing Service (NPI 1962551861, Walnut Creek, CA); Permanente Medical Group Inc (NPI 1336222397, Vallejo, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Stanford University School Of Medicine, class of 2018
## Record status
- **NPPES last updated:** December 17, 2021
---
Source: [NPI Profile](https://npiprofile.com/npi/1053600312) · Data from the CMS NPPES public registry.