WILLIAM HALEY FISKE MD
NPI 1871634295
Internal Medicine - Gastroenterology in Nashville, TN
About William Haley Fiske Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM HALEY FISKE MD (NPI 1871634295) is an individual gastroenterology provider in Nashville, Tennessee, licensed in Tennessee (45027) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, is affiliated with Vanderbilt University Medical Center, and maintains a secondary practice location in Nashville.
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
William Haley Fiske 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 Reassignment
Medicare enrollment records show William Fiske 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, TNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 37232 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
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 William Fiske's NPI number?
The NPI number for William Fiske is 1871634295. It was assigned to this individual provider in the NPPES registry on February 9, 2007.
Where is William Fiske located?
William Fiske practices at 3601 Tvc, Nashville, TN 37232. The listed phone number is (615) 322-3000.
What is William Fiske's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is William Fiske enrolled in Medicare?
Yes. William Fiske 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 William Fiske's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Fiske 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 William Fiske's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Fiske accept?
Health plans from Alliant Health Plans, Inc., BlueCross BlueShield of Tennessee, Cigna Healthcare and Oscar Insurance Company list William Fiske 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 William Fiske affiliated with any hospitals?
According to CMS data, William Fiske is affiliated with Vanderbilt University Medical Center.
When was this NPI record last updated?
The NPPES record for William Fiske was last updated on March 25, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# William Haley Fiske, MD · NPI 1871634295
Gastroenterology physician in Nashville, Tennessee. Individual provider, active in the CMS NPPES registry since February 9, 2007.
## Identity
- **NPI:** 1871634295 (Entity type: Individual)
- **Enumerated:** February 9, 2007
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 45027 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 3601 TVC, Nashville, TN 37232-0001
- **Phone:** (615) 322-3000
## 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:** Vanderbilt University Medical Center (NPI 1104202761, Nashville, TN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Vanderbilt University School Of Medicine, class of 2003
## Record status
- **NPPES last updated:** March 25, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1871634295) · Data from the CMS NPPES public registry.