DR. JASON ELLIS COOK MD
NPI 1689775140
Pediatrics - Pediatric Critical Care Medicine in Orange, CA
About Dr. Jason Ellis Cook Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JASON ELLIS COOK MD (NPI 1689775140) is an individual pediatric critical care medicine provider in Orange, California, licensed in California (A75756) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Boston, and is a graduate of University Of Vermont College Of Medicine (1999).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 3
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
Dr. Jason Ellis Cook 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
2Medicare enrollment records show Jason Cook reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Childrens Hospital Of Orange County
- 190 clinicians in this Medicare group
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 143 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.
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.
ORANGE, CA 92868
ORANGE, CA 92868
ORANGE, CA 92868
ORANGE, CA 92868
ORANGE, CA 92868
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 Jason Cook's NPI number?
The NPI number for Jason Cook is 1689775140. It was assigned to this individual provider in the NPPES registry on September 26, 2006.
Where is Jason Cook located?
Jason Cook practices at 1201 W La Veta Ave, Orange, CA 92868. The listed phone number is (714) 509-8620.
What is Jason Cook's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.
Is Jason Cook enrolled in Medicare?
Yes. Jason Cook 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 Jason Cook's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jason Cook reassigns Medicare benefits to 2 organizations: Children's Hospital Of Orange County (Orange, CA) and Uc Regents Uci Dept Of Pediatrics (Orange, 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 Jason Cook'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 Jason Cook was last updated on February 4, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Dr. Jason Ellis Cook, MD · NPI 1689775140
Pediatric Critical Care Medicine physician in Orange, California. Individual provider, active in the CMS NPPES registry since September 26, 2006.
## Identity
- **NPI:** 1689775140 (Entity type: Individual)
- **Enumerated:** September 26, 2006
- **Primary specialty:** Pediatrics - Pediatric Critical Care Medicine · taxonomy 2080P0203X
- **State license:** A75756 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1201 W LA VETA AVE, Orange, CA 92868
- **Phone:** (714) 509-8620 · **Fax:** (714) 509-4072
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Children's Hospital Of Orange County (NPI 1275975104, Orange, CA); Uc Regents Uci Dept Of Pediatrics (NPI 1235187311, Orange, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Vermont College Of Medicine, class of 1999
## Record status
- **NPPES last updated:** February 4, 2019
- **Other identifiers:** Medicaid 2104032 (MA); Other 470153 (MA); Other J28546 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1689775140) · Data from the CMS NPPES public registry.