DR. LYLY UNG O.D.
NPI 1235198631
Optometrist - Low Vision Rehabilitation in San Francisco, CA
About Dr. Lyly Ung O.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LYLY UNG O.D. (NPI 1235198631) is an individual low vision rehabilitation provider in San Francisco, California, licensed in California (10244TPL) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS and is a graduate of Southern California College Of Optometry (1993).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
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. Lyly Ung 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 Reassignments
2Medicare enrollment records show Lyly Ung reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94112
- Reassigned Medicare billing, California enrollment
- 2 clinicians in this Medicare group
Novato, CA 94949
- Reassigned Medicare billing, California enrollment
- 28 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 94112 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 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 Lyly Ung's NPI number?
The NPI number for Lyly Ung is 1235198631. It was assigned to this individual provider in the NPPES registry on March 23, 2006.
Where is Lyly Ung located?
Lyly Ung practices at 940 Geneva Ave, San Francisco, CA 94112. The listed phone number is (415) 585-6588.
What is Lyly Ung's specialty?
The primary specialty registered for this NPI is Optometrist, specializing in Low Vision Rehabilitation, with taxonomy code 152WL0500X.
Is Lyly Ung enrolled in Medicare?
Yes. Lyly Ung 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 Lyly Ung's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lyly Ung reassigns Medicare benefits to 2 organizations: Geneva Eye Care Optometry Inc (San Francisco, CA) and Ecs Of Bay Area Optometry Corporation (Novato, 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 Lyly Ung's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lyly Ung accept?
Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and Providence Health Plan list Lyly Ung as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Lyly Ung was last updated on October 15, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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. Lyly Ung, O.D. · NPI 1235198631
Low Vision Rehabilitation provider in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 23, 2006.
## Identity
- **NPI:** 1235198631 (Entity type: Individual)
- **Enumerated:** March 23, 2006
- **Primary specialty:** Optometrist - Low Vision Rehabilitation · taxonomy 152WL0500X
- **State license:** 10244TPL (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 940 GENEVA AVE, San Francisco, CA 94112-3403
- **Phone:** (415) 585-6588 · **Fax:** (415) 585-6403
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Geneva Eye Care Optometry Inc (NPI 1114369691, San Francisco, CA); Ecs Of Bay Area Optometry Corporation (NPI 1154207868, Novato, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Southern California College Of Optometry, class of 1993
## Record status
- **NPPES last updated:** October 15, 2020
- **Other identifiers:** Medicaid SD0102441 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1235198631) · Data from the CMS NPPES public registry.