GREGORY NELSON ROOP
NPI 1346747128
Anesthesiology in Nashville, TN
About Gregory Nelson Roop NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY NELSON ROOP (NPI 1346747128) is an individual anesthesiology provider in Nashville, Tennessee, licensed in Tennessee (60690) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS, is affiliated with Vanderbilt University Medical Center, and maintains a secondary practice location in Greenville.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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 and accepts Medicare assignment
Gregory Nelson Roop 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 Reassignment
Medicare enrollment records show Gregory Roop reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Nashville, TN 37232
- Reassigned Medicare billing, Tennessee enrollment
- 4,711 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 9
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.
Vanderbilt University Medical Center
Acute Care Hospitals · Nashville, TNOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NASHVILLE, TN 37232
NASHVILLE, TN 37232
NASHVILLE, TN 37232
NASHVILLE, TN 37232
NASHVILLE, TN 37232
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 Gregory Roop's NPI number?
The NPI number for Gregory Roop is 1346747128. It was assigned to this individual provider in the NPPES registry on April 9, 2018.
Where is Gregory Roop located?
Gregory Roop practices at 3601 The Vanderbilt Clinic, Nashville, TN 37232. The listed phone number is (615) 322-3000.
What is Gregory Roop's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Gregory Roop enrolled in Medicare?
Yes. Gregory Roop 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 organization bills Medicare for Gregory Roop's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Roop reassigns Medicare benefits to Vanderbilt University Medical Center (Nashville, 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 Gregory Roop's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gregory Roop accept?
Health plans from Alliant Health Plans, Inc. and Oscar Insurance Company list Gregory Roop 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 Gregory Roop affiliated with any hospitals?
According to CMS data, Gregory Roop is affiliated with Vanderbilt University Medical Center.
When was this NPI record last updated?
The NPPES record for Gregory Roop was last updated on October 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.