GREG G KOJAYAN MD
NPI 1689200594
Anesthesiology in West Hollywood, CA
About Greg G Kojayan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREG G KOJAYAN MD (NPI 1689200594) is an individual anesthesiology provider in West Hollywood, California, licensed in California (A190679) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, maintains a secondary practice location in Los Angeles, and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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
Greg G Kojayan 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
4Medicare enrollment records show Greg Kojayan reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90048
- Reassigned Medicare billing, California enrollment
- 2,118 clinicians in this Medicare group
Burbank, CA 91505
- Reassigned Medicare billing, California enrollment
- 98 clinicians in this Medicare group
Glendale, CA 91206
- Reassigned Medicare billing, California enrollment
- 164 clinicians in this Medicare group
Simi Valley, CA 93065
- Reassigned Medicare billing, California enrollment
- 37 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
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.
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.
WEST HOLLYWOOD, CA 90048
WEST HOLLYWOOD, CA 90048
WEST HOLLYWOOD, CA 90048
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 Greg Kojayan's NPI number?
The NPI number for Greg Kojayan is 1689200594. It was assigned to this individual provider in the NPPES registry on March 23, 2020.
Where is Greg Kojayan located?
Greg Kojayan practices at 8700 Beverly Blvd, West Hollywood, CA 90048. The listed phone number is (310) 423-5841.
What is Greg Kojayan's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Greg Kojayan enrolled in Medicare?
Yes. Greg Kojayan 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 Greg Kojayan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Greg Kojayan reassigns Medicare benefits to 4 organizations: Cedars-Sinai Medical Care Foundation (Los Angeles, CA), Buena Vista Anesthesia Medical Group (Burbank, CA), Glendale Adventist Medical Center (Glendale, CA) and Simi Valley Anesthesia Medical Group (Simi Valley, 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 Greg Kojayan'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 Greg Kojayan was last updated on August 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Greg G Kojayan, MD · NPI 1689200594
Anesthesiology physician in West Hollywood, California. Individual provider, active in the CMS NPPES registry since March 23, 2020.
## Identity
- **NPI:** 1689200594 (Entity type: Individual)
- **Enumerated:** March 23, 2020
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** A190679 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 8700 BEVERLY BLVD, West Hollywood, CA 90048-1804
- **Phone:** (310) 423-5841
## 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): Cedars-Sinai Medical Care Foundation (NPI 1043826720, Los Angeles, CA); Buena Vista Anesthesia Medical Group (NPI 1366462293, Burbank, CA); Glendale Adventist Medical Center (NPI 1336138403, Glendale, CA); Simi Valley Anesthesia Medical Group (NPI 1912936709, Simi Valley, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** August 18, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1689200594) · Data from the CMS NPPES public registry.