JOHN STEPHEN CORNS DO
NPI 1265560437
Pediatrics - Pediatric Hematology-Oncology in Knoxville, TN
About John Stephen Corns Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN STEPHEN CORNS DO (NPI 1265560437) is an individual pediatric hematology-oncology provider in Knoxville, Tennessee, licensed in Tennessee (2142) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
John Stephen Corns Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show John Corns reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Knoxville, TN 37916
- Reassigned Medicare billing, Tennessee enrollment
- 6 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.
KNOXVILLE, TN 37916
KNOXVILLE, TN 37916
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 John Corns's NPI number?
The NPI number for John Corns is 1265560437. It was assigned to this individual provider in the NPPES registry on March 1, 2007.
Where is John Corns located?
John Corns practices at 2018 Clinch Ave, Knoxville, TN 37916. The listed phone number is (865) 541-8266.
What is John Corns's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.
Is John Corns enrolled in Medicare?
Yes. John Corns is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for John Corns's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Corns reassigns Medicare benefits to East Tennessee Children's Hospital Association, Inc. (Knoxville, TN). 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 John Corns's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Corns accept?
Health plans from BlueCross BlueShield of Tennessee and Cigna Healthcare list John Corns 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.
When was this NPI record last updated?
The NPPES record for John Corns was last updated on February 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.
# John Stephen Corns, DO · NPI 1265560437
Pediatric Hematology-Oncology physician in Knoxville, Tennessee. Individual provider, active in the CMS NPPES registry since March 1, 2007.
## Identity
- **NPI:** 1265560437 (Entity type: Individual)
- **Enumerated:** March 1, 2007
- **Primary specialty:** Pediatrics - Pediatric Hematology-Oncology · taxonomy 2080P0207X
- **State license:** 2142 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 2018 CLINCH AVE, Knoxville, TN 37916-2301
- **Phone:** (865) 541-8266 · **Fax:** (865) 541-8553
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** East Tennessee Children's Hospital Association, Inc. (NPI 1194921874, Knoxville, TN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 14, 2025
- **Other identifiers:** Medicaid 1518163 (TN)
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Source: [NPI Profile](https://npiprofile.com/npi/1265560437) · Data from the CMS NPPES public registry.