ANTHONY JOHN E. CASTANARES OD
NPI 1235629361
Optometrist in Dublin, CA
About Anthony John E. Castanares Od NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANTHONY JOHN E. CASTANARES OD (NPI 1235629361) is an individual optometrist in Dublin, California, licensed in California (33918TLG) and active in the NPI registry since May 2018. He is enrolled in Medicare PECOS and is a graduate of Southern California College Of Optometry (2017).
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
Anthony John E. Castanares Od 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 Anthony Castanares reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Redwood City, CA 94063
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Sacramento, CA 95811
- Reassigned Medicare billing, California enrollment
- 7 clinicians in this Medicare group
Tahlequah, OK 74464
- Reassigned Medicare billing, Oklahoma enrollment
- 96 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 94568 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Anthony Castanares's NPI number?
The NPI number for Anthony Castanares is 1235629361. It was assigned to this individual provider in the NPPES registry on May 15, 2018.
Where is Anthony Castanares located?
Anthony Castanares practices at 7763 Squirrel Creek Cir, Dublin, CA 94568. The listed phone number is (925) 548-6143.
What is Anthony Castanares's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Anthony Castanares enrolled in Medicare?
Yes. Anthony Castanares 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 Anthony Castanares's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Anthony Castanares reassigns Medicare benefits to 3 organizations: Permanente Medical Group Inc (Redwood City, CA), Society For The Blind (Sacramento, CA) and Northeastern State University College Of Optometry (Tahlequah, OK). 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 Anthony Castanares'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 Anthony Castanares was last updated on May 17, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Anthony John E. Castanares, OD · NPI 1235629361
Optometrist provider in Dublin, California. Individual provider, active in the CMS NPPES registry since May 15, 2018.
## Identity
- **NPI:** 1235629361 (Entity type: Individual)
- **Enumerated:** May 15, 2018
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** 33918TLG (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 7763 SQUIRREL CREEK CIR, Dublin, CA 94568
- **Phone:** (925) 548-6143
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Permanente Medical Group Inc (NPI 1639252604, Redwood City, CA); Society For The Blind (NPI 1083718100, Sacramento, CA); Northeastern State University College Of Optometry (NPI 1437106333, Tahlequah, OK) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Southern California College Of Optometry, class of 2017
## Record status
- **NPPES last updated:** May 17, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1235629361) · Data from the CMS NPPES public registry.