EVAN CHRISTOPHER KEY
NPI 1811863442
Nurse Practitioner - Acute Care in Tulsa, OK
About Evan Christopher Key NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
EVAN CHRISTOPHER KEY (NPI 1811863442) is an individual acute care provider in Tulsa, Oklahoma, licensed in Oklahoma (226535) and active in the NPI registry since October 2025. He is enrolled in Medicare PECOS, is affiliated with Ascension St John Medical Center, and is a graduate of Other (2025).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
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
Evan Christopher Key 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 Evan Key reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Tulsa, OK 74136
- Reassigned Medicare billing, Oklahoma enrollment
- 300 clinicians in this Medicare group
Broken Arrow, OK 74012
- Reassigned Medicare billing, Oklahoma enrollment
- 48 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ascension St John Medical Center
Acute Care Hospitals · Tulsa, OKPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 74104 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.
TULSA, OK 74104
TULSA, OK 74104
TULSA, OK 74104
TULSA, OK 74104
TULSA, OK 74104
TULSA, OK 74104
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 Evan Key's NPI number?
The NPI number for Evan Key is 1811863442. It was assigned to this individual provider in the NPPES registry on October 13, 2025.
Where is Evan Key located?
Evan Key practices at 1923 S Utica Ave, Tulsa, OK 74104. The listed phone number is (918) 744-3131.
What is Evan Key's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Evan Key enrolled in Medicare?
Yes. Evan Key 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 Evan Key's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Evan Key reassigns Medicare benefits to 2 organizations: Usacs Observation Medicine Services Of Oklahoma, LLC (Tulsa, OK) and Usacs Critical Care Medicine Of Oklahoma, LLC (Broken Arrow, OK). 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 Evan Key's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Evan Key accept?
Health plans from Blue Cross and Blue Shield of Oklahoma list Evan Key as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Evan Key affiliated with any hospitals?
According to CMS data, Evan Key is affiliated with Ascension St John Medical Center.
When was this NPI record last updated?
The NPPES record for Evan Key was last updated on December 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Evan Christopher Key · NPI 1811863442
Acute Care physician in Tulsa, Oklahoma. Individual provider, active in the CMS NPPES registry since October 13, 2025.
## Identity
- **NPI:** 1811863442 (Entity type: Individual)
- **Enumerated:** October 13, 2025
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** 226535 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 1923 S UTICA AVE, Tulsa, OK 74104-6520
- **Phone:** (918) 744-3131
## 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): Usacs Observation Medicine Services Of Oklahoma, LLC (NPI 1326739111, Tulsa, OK); Usacs Critical Care Medicine Of Oklahoma, LLC (NPI 1255166856, Broken Arrow, OK) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2025
## Record status
- **NPPES last updated:** December 4, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1811863442) · Data from the CMS NPPES public registry.