JOSEPH DEMER MD
NPI 1710900535
Ophthalmology in Los Angeles, CA
About Joseph Demer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOSEPH DEMER MD (NPI 1710900535) is an individual ophthalmology provider in Los Angeles, California, licensed in California (A43662) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Johns Hopkins University School Of Medicine (1983).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Joseph Demer 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 Joseph Demer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 123 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 9
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 90095 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 Joseph Demer's NPI number?
The NPI number for Joseph Demer is 1710900535. It was assigned to this individual provider in the NPPES registry on July 25, 2006.
Where is Joseph Demer located?
Joseph Demer practices at 200 Stein Plaza Suite 3-310, Los Angeles, CA 90095. The listed phone number is (310) 825-5931.
What is Joseph Demer's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Joseph Demer enrolled in Medicare?
Yes. Joseph Demer 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 Joseph Demer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Demer reassigns Medicare benefits to Jules Stein Eye Institute Medical Group (Los Angeles, 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 Joseph Demer'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 Joseph Demer was last updated on January 23, 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.
# Joseph Demer, MD · NPI 1710900535
Ophthalmology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since July 25, 2006.
## Identity
- **NPI:** 1710900535 (Entity type: Individual)
- **Enumerated:** July 25, 2006
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** A43662 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 STEIN PLAZA SUITE 3-310, Los Angeles, CA 90095-0001
- **Phone:** (310) 825-5931 · **Fax:** (310) 206-7826
## 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:** Jules Stein Eye Institute Medical Group (NPI 1326006966, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Johns Hopkins University School Of Medicine, class of 1983
## Record status
- **NPPES last updated:** January 23, 2020
- **Other identifiers:** Medicaid 00A436620 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1710900535) · Data from the CMS NPPES public registry.