RON GUTMARK MD
NPI 1609189893
Ophthalmology in Glendora, CA
About Ron Gutmark Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RON GUTMARK MD (NPI 1609189893) is an individual ophthalmology provider in Glendora, California, licensed in California (A129409) and active in the NPI registry since July 2010. He is enrolled in Medicare PECOS and is a graduate of Johns Hopkins University School Of Medicine (2010).
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
Ron Gutmark 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 Reassignments
3Medicare enrollment records show Ron Gutmark reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Pasadena, CA 91106
- Reassigned Medicare billing, California enrollment
- 3 clinicians in this Medicare group
Glendale, CA 91203
- Reassigned Medicare billing, California enrollment
- 7 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 129 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.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91741 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.
GLENDORA, CA 91741
GLENDORA, CA 91741
GLENDORA, CA 91741
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 Ron Gutmark's NPI number?
The NPI number for Ron Gutmark is 1609189893. It was assigned to this individual provider in the NPPES registry on July 16, 2010.
Where is Ron Gutmark located?
Ron Gutmark practices at 210 S Grand Ave #106, Glendora, CA 91741. The listed phone number is (626) 335-0535.
What is Ron Gutmark's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Ron Gutmark enrolled in Medicare?
Yes. Ron Gutmark 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 Ron Gutmark's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ron Gutmark reassigns Medicare benefits to 3 organizations: Almira Wilson Cann MD Inc (Pasadena, CA), Specialty Eye Care Medical Center, Inc. (Glendale, CA) and Regents Of The University Of California (San Diego, 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 Ron Gutmark'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 Ron Gutmark was last updated on June 29, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Ron Gutmark, MD · NPI 1609189893
Ophthalmology physician in Glendora, California. Individual provider, active in the CMS NPPES registry since July 16, 2010.
## Identity
- **NPI:** 1609189893 (Entity type: Individual)
- **Enumerated:** July 16, 2010
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** A129409 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 210 S GRAND AVE, #106, Glendora, CA 91741-4205
- **Phone:** (626) 335-0535
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Almira Wilson Cann MD Inc (NPI 1417108069, Pasadena, CA); Specialty Eye Care Medical Center, Inc. (NPI 1932137601, Glendale, CA); Regents Of The University Of California (NPI 1699877621, San Diego, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Johns Hopkins University School Of Medicine, class of 2010
## Record status
- **NPPES last updated:** June 29, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1609189893) · Data from the CMS NPPES public registry.