JULIEN CYRILL ATAYAN BELEN OD
NPI 1922998780
Optometrist in San Francisco, CA
About Julien Cyrill Atayan Belen Od NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JULIEN CYRILL ATAYAN BELEN OD (NPI 1922998780) is an individual optometrist in San Francisco, California, licensed in California (OPT36001) and active in the NPI registry since July 2025. He is enrolled in Medicare PECOS and is a graduate of University Of California - School Of Optometry (2025).
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
Julien Cyrill Atayan Belen 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 Reassignment
Medicare enrollment records show Julien Cyrill Belen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Berkeley, CA 94720
- Reassigned Medicare billing, California 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 94121 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 94121
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 Julien Cyrill Belen's NPI number?
The NPI number for Julien Cyrill Belen is 1922998780. It was assigned to this individual provider in the NPPES registry on July 3, 2025.
Where is Julien Cyrill Belen located?
Julien Cyrill Belen practices at 4150 Clement St, San Francisco, CA 94121. The listed phone number is (209) 337-5249.
What is Julien Cyrill Belen's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Julien Cyrill Belen enrolled in Medicare?
Yes. Julien Cyrill Belen 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 Julien Cyrill Belen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Julien Cyrill Belen reassigns Medicare benefits to Regents Of The University Of California At Berkeley (Berkeley, 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 Julien Cyrill Belen'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 Julien Cyrill Belen was last updated on July 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Julien Cyrill Atayan Belen, OD · NPI 1922998780
Optometrist provider in San Francisco, California. Individual provider, active in the CMS NPPES registry since July 3, 2025.
## Identity
- **NPI:** 1922998780 (Entity type: Individual)
- **Enumerated:** July 3, 2025
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** OPT36001 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4150 CLEMENT ST, San Francisco, CA 94121-1563
- **Phone:** (209) 337-5249
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Regents Of The University Of California At Berkeley (NPI 1306908058, Berkeley, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California - School Of Optometry, class of 2025
## Record status
- **NPPES last updated:** July 3, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1922998780) · Data from the CMS NPPES public registry.