ISABELLA PHAN MD
NPI 1598977415
Ophthalmology in San Francisco, CA
About Isabella Phan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ISABELLA PHAN MD (NPI 1598977415) is an individual ophthalmology provider in San Francisco, California, licensed in California (99033) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (2005).
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
Isabella Phan Md 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 Isabella Phan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94116
- 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 94143 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 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
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 Isabella Phan's NPI number?
The NPI number for Isabella Phan is 1598977415. It was assigned to this individual provider in the NPPES registry on May 4, 2007.
Where is Isabella Phan located?
Isabella Phan practices at 400 Parnassus Ave Univ Of California, San Francisco, San Francisco, CA 94143. The listed phone number is (415) 353-2608.
What is Isabella Phan's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Isabella Phan enrolled in Medicare?
Yes. Isabella Phan 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 Isabella Phan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Isabella Phan reassigns Medicare benefits to Permanente Medical Group Inc (San Francisco, 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 Isabella Phan'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 Isabella Phan was last updated on January 18, 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.
# Isabella Phan, MD · NPI 1598977415
Ophthalmology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since May 4, 2007.
## Identity
- **NPI:** 1598977415 (Entity type: Individual)
- **Enumerated:** May 4, 2007
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 99033 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 400 PARNASSUS AVE, UNIV OF CALIFORNIA, SAN FRANCISCO, San Francisco, CA 94143-2202
- **Phone:** (415) 353-2608
## 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 1841373800, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Francisco School Of Medicine, class of 2005
## Record status
- **NPPES last updated:** January 18, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1598977415) · Data from the CMS NPPES public registry.