HAMID R. RASSAI
NPI 1013013218
Surgery in Antioch, CA
About Hamid R. Rassai NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HAMID R. RASSAI (NPI 1013013218) is an individual surgery provider in Antioch, California, licensed in California (A060998) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Concord, and is a graduate of Medical College Of Pennsylvania (1995).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Hamid R. Rassai 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
3Medicare enrollment records show Hamid Rassai reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Antioch, CA 94509
- Reassigned Medicare billing, California enrollment
- 347 clinicians in this Medicare group
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 810 clinicians in this Medicare group
French Camp, CA 95231
- Reassigned Medicare billing, California enrollment
- 512 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.
Areas of Expertise CMS Part B claims 13
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94509 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
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 Hamid Rassai's NPI number?
The NPI number for Hamid Rassai is 1013013218. It was assigned to this individual provider in the NPPES registry on September 15, 2006.
Where is Hamid Rassai located?
Hamid Rassai practices at 2350 Country Hills Dr Ste A, Antioch, CA 94509. The listed phone number is (925) 757-0800.
What is Hamid Rassai's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Hamid Rassai enrolled in Medicare?
Yes. Hamid Rassai 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 Hamid Rassai's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hamid Rassai reassigns Medicare benefits to 3 organizations: Bass Medical Group (Antioch, CA), John Muir Trauma Physicians Billing Service (Walnut Creek, CA) and San Joaquin Faculty Medical Group (French Camp, 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 Hamid Rassai'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 Hamid Rassai was last updated on June 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months 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.
# Hamid R. Rassai · NPI 1013013218
Surgery physician in Antioch, California. Individual provider, active in the CMS NPPES registry since September 15, 2006.
## Identity
- **NPI:** 1013013218 (Entity type: Individual)
- **Enumerated:** September 15, 2006
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** A060998 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2350 COUNTRY HILLS DR STE A, Antioch, CA 94509-7436
- **Phone:** (925) 757-0800 · **Fax:** (925) 757-2160
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Bass Medical Group (NPI 1396124574, Antioch, CA); John Muir Trauma Physicians Billing Service (NPI 1962551861, Walnut Creek, CA); San Joaquin Faculty Medical Group (NPI 1225063761, French Camp, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Pennsylvania, class of 1995
## Record status
- **NPPES last updated:** June 3, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1013013218) · Data from the CMS NPPES public registry.