MARK AUREL NAGY MD, PHD
NPI 1811637945
Ophthalmology in San Francisco, CA
About Mark Aurel Nagy Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK AUREL NAGY MD, PHD (NPI 1811637945) is an individual ophthalmology provider in San Francisco, California, licensed in California (A188894) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (2022).
NPPES Registry Identity
Specialties & Licenses 2
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
Mark Aurel Nagy Md, Phd 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
4Medicare enrollment records show Mark Nagy reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 842 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 2,112 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 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 94158 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 Mark Nagy's NPI number?
The NPI number for Mark Nagy is 1811637945. It was assigned to this individual provider in the NPPES registry on March 29, 2022.
Where is Mark Nagy located?
Mark Nagy practices at 490 Illinois Street, 5th Floor, San Francisco, CA 94158. The listed phone number is (415) 353-2020.
What is Mark Nagy's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Mark Nagy enrolled in Medicare?
Yes. Mark Nagy 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 Mark Nagy's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Nagy reassigns Medicare benefits to 4 organizations: University Of California Sfgh Medical Group (San Francisco, CA), Regents Of The University Of California (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, 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 Mark Nagy'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 Mark Nagy was last updated on April 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Mark Aurel Nagy, MD, PHD · NPI 1811637945
Ophthalmology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 29, 2022.
## Identity
- **NPI:** 1811637945 (Entity type: Individual)
- **Enumerated:** March 29, 2022
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** A188894 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 490 ILLINOIS STREET, 5TH FLOOR, San Francisco, CA 94158
- **Phone:** (415) 353-2020
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): University Of California Sfgh Medical Group (NPI 1174598296, San Francisco, CA); Regents Of The University Of California (NPI 1235322348, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2022
## Record status
- **NPPES last updated:** April 16, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1811637945) · Data from the CMS NPPES public registry.