DR. JENIFER KENI KEIKO ISHIZAKI CHUNG O.D.
NPI 1821140534
Optometrist in Antioch, CA
About Dr. Jenifer Keni Keiko Ishizaki Chung O.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JENIFER KENI KEIKO ISHIZAKI CHUNG O.D. (NPI 1821140534) is an individual optometrist in Antioch, California, licensed in California (11660) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS and is a graduate of Southern California College Of Optometry (2001).
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
Dr. Jenifer Keni Keiko Ishizaki Chung O.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 Jenifer Chung reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
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 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.
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.
ANTIOCH, CA 94509
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 Jenifer Chung's NPI number?
The NPI number for Jenifer Chung is 1821140534. It was assigned to this individual provider in the NPPES registry on January 16, 2007.
Where is Jenifer Chung located?
Jenifer Chung practices at 3400 Delta Fair Blvd Eyecare Clinic-Optometry, Antioch, CA 94509. The listed phone number is (925) 779-4378.
What is Jenifer Chung's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Jenifer Chung enrolled in Medicare?
Yes. Jenifer Chung 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 Jenifer Chung's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jenifer Chung reassigns Medicare benefits to Permanente Medical Group Inc (Vallejo, 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 Jenifer Chung'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 Jenifer Chung was last updated on January 3, 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.
# Dr. Jenifer Keni Keiko Ishizaki Chung, O.D. · NPI 1821140534
Optometrist provider in Antioch, California. Individual provider, active in the CMS NPPES registry since January 16, 2007.
## Identity
- **NPI:** 1821140534 (Entity type: Individual)
- **Enumerated:** January 16, 2007
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** 11660 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3400 DELTA FAIR BLVD, EYECARE CLINIC-OPTOMETRY, Antioch, CA 94509-4004
- **Phone:** (925) 779-4378 · **Fax:** (925) 779-5421
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1336222397, Vallejo, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Southern California College Of Optometry, class of 2001
## Record status
- **NPPES last updated:** January 3, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1821140534) · Data from the CMS NPPES public registry.