CESAR ANTHONY ATIENZA JR. M.D.
NPI 1841343258
Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery in Santa Clara, CA
About Cesar Anthony Atienza Jr. M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CESAR ANTHONY ATIENZA JR. M.D. (NPI 1841343258) is an individual adult reconstructive orthopaedic surgery provider in Santa Clara, California, licensed in California (A96046) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of University Of Louisville School Of Medicine (2001).
NPPES Registry Identity
Specialties & Licenses 2
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
Cesar Anthony Atienza Jr. 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 Cesar Atienza reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Santa Clara, CA 95051
- 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.
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.
SANTA CLARA, CA 95051
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 Cesar Atienza's NPI number?
The NPI number for Cesar Atienza is 1841343258. It was assigned to this individual provider in the NPPES registry on January 19, 2007.
Where is Cesar Atienza located?
Cesar Atienza practices at 700 Lawrence Expy Department Of Orthopaedic Surgery, Santa Clara, CA 95051. The listed phone number is (650) 787-6428.
What is Cesar Atienza's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Adult Reconstructive Orthopaedic Surgery, with taxonomy code 207XS0114X.
Is Cesar Atienza enrolled in Medicare?
Yes. Cesar Atienza 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 Cesar Atienza's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Cesar Atienza reassigns Medicare benefits to Permanente Medical Group Inc (Santa Clara, 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 Cesar Atienza'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 Cesar Atienza was last updated on February 11, 2022. 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.
# Cesar Anthony Atienza Jr., M.D. · NPI 1841343258
Adult Reconstructive Orthopaedic Surgery physician in Santa Clara, California. Individual provider, active in the CMS NPPES registry since January 19, 2007.
## Identity
- **NPI:** 1841343258 (Entity type: Individual)
- **Enumerated:** January 19, 2007
- **Primary specialty:** Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery · taxonomy 207XS0114X
- **State license:** A96046 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 700 LAWRENCE EXPY, DEPARTMENT OF ORTHOPAEDIC SURGERY, Santa Clara, CA 95051-5173
- **Phone:** (650) 787-6428
## 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 1073606299, Santa Clara, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Louisville School Of Medicine, class of 2001
## Record status
- **NPPES last updated:** February 11, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1841343258) · Data from the CMS NPPES public registry.