MR. STEPHEN RAY KOSTER C.R.N.A.
NPI 1942221726
Nurse Anesthetist, Certified Registered in Savannah, TN
About Mr. Stephen Ray Koster C.r.n.a. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. STEPHEN RAY KOSTER C.R.N.A. (NPI 1942221726) is an individual nurse anesthetist, certified registered in Savannah, Tennessee, licensed in Mississippi (R858883) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Deaconess Henderson Hospital, and is a graduate of Virginia Commonwealth University, School Of Medicine (1981).
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
Mr. Stephen Ray Koster C.r.n.a. 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
7Medicare enrollment records show Stephen Koster reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Cadiz, KY 42211
- Reassigned Medicare billing, Kentucky enrollment
- 105 clinicians in this Medicare group
Hopkinsville, KY 42240
- Reassigned Medicare billing, Kentucky enrollment
- 319 clinicians in this Medicare group
Madisonville, KY 42431
- Reassigned Medicare billing, Kentucky enrollment
- Medicare enrollment name: Methodist Health, Inc.
- 125 clinicians in this Medicare group
Evansville, IN 47712
- Reassigned Medicare billing, Indiana enrollment
- 717 clinicians in this Medicare group
Louisville, KY 40202
- Reassigned Medicare billing, Kentucky enrollment
- 526 clinicians in this Medicare group
Louisville, KY 40207
- Reassigned Medicare billing, Kentucky enrollment
- 125 clinicians in this Medicare group
Plymouth, NH 03264
- Reassigned Medicare billing, New Hampshire enrollment
- 219 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Deaconess Henderson Hospital
Acute Care Hospitals · Henderson, KYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 38372 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.
SAVANNAH, TN 38372
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 Stephen Koster's NPI number?
The NPI number for Stephen Koster is 1942221726. It was assigned to this individual provider in the NPPES registry on July 21, 2006.
Where is Stephen Koster located?
Stephen Koster practices at 935 Wayne Rd, Savannah, TN 38372. The listed phone number is (731) 926-8179.
What is Stephen Koster's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Stephen Koster enrolled in Medicare?
Yes. Stephen Koster 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 Stephen Koster's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Koster reassigns Medicare benefits to 7 organizations: Trigg County Hospital, Inc (Cadiz, KY), Commonwealth Health Corporation, Inc (Hopkinsville, KY), Community United Methodist Hospital Inc (Madisonville, KY), Deaconess Hospital Inc (Evansville, IN), Professional Anesthesia Services Of Kentucky PLLC (Louisville, KY) and 2 more organizations, listed in the Medicare section above. 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 Stephen Koster's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephen Koster accept?
Health plans from CareSource list Stephen Koster 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 Stephen Koster affiliated with any hospitals?
According to CMS data, Stephen Koster is affiliated with Deaconess Henderson Hospital.
When was this NPI record last updated?
The NPPES record for Stephen Koster was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Mr. Stephen Ray Koster, C.R.N.A. · NPI 1942221726
Nurse Anesthetist, Certified Registered physician in Savannah, Tennessee. Individual provider, active in the CMS NPPES registry since July 21, 2006.
## Identity
- **NPI:** 1942221726 (Entity type: Individual)
- **Enumerated:** July 21, 2006
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** R858883 (Mississippi)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 935 WAYNE RD, Savannah, TN 38372-1937
- **Phone:** (731) 926-8179
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging
- **Bills Medicare through:** 7 organizations under Medicare reassignment (form CMS-855R): Trigg County Hospital, Inc (NPI 1538218680, Cadiz, KY); Commonwealth Health Corporation, Inc (NPI 1861979304, Hopkinsville, KY); Community United Methodist Hospital Inc (NPI 1639502966, Madisonville, KY); Deaconess Hospital Inc (NPI 1942183769, Evansville, IN); Professional Anesthesia Services Of Kentucky PLLC (NPI 1992212807, Louisville, KY); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Virginia Commonwealth University, School Of Medicine, class of 1981
## Record status
- **NPPES last updated:** July 8, 2007
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Source: [NPI Profile](https://npiprofile.com/npi/1942221726) · Data from the CMS NPPES public registry.