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WILLIAM HENSLEY MERWIN JR. M.D.
NPI 1215924691
Specialist in Knoxville, TN

Active since September 30, 2005PECOS Enrolled
11201 WEST POINT DR, SUITE 103, KNOXVILLE, TN 37934(865) 777-1727(865) 966-0942 Get Directions Write a Review

NPPES record last updated: April 26, 2011. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About William Hensley Merwin Jr. M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM HENSLEY MERWIN JR. M.D. (NPI 1215924691) is an individual specialist in Knoxville, Tennessee, licensed in Tennessee (MD0000020891) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1215924691
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameWILLIAM HENSLEY MERWIN JR.Credential: M.D.
Location Address11201 WEST POINT DR, SUITE 103Knoxville, TN 37934-2833
Mailing Address11201 West Point Dr, Suite 103Knoxville, TN 37934-2833 · (865) 777-1727 · Fax (865) 966-0942
Phone(865) 777-1727
Fax(865) 966-0942
Sole ProprietorNo
Enumeration DateSeptember 30, 2005
Last NPPES UpdateApril 26, 2011
✔ NPI 1215924691 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in TN · MD0000020891
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
11201 WEST POINT DR, Knoxville, TN 37934
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Other Identifiers 1

Medicare UPINC85511TN

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Hensley Merwin Jr. M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Merwin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Otolaryngology Head And Neck Surgery Associates
0.4 mi
Specialist
144 CONCORD RD
Knoxville, TN 37934
  • Reassigned Medicare billing, Tennessee enrollment
  • 24 clinicians in this Medicare group
NPI 1184704207 (865) 777-1727

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

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MR. JERRY VANCE PAC
Family Medicine
11201 WEST POINT DR, SUITE 102 FARRAGUT FAMILY PRACTICE
KNOXVILLE, TN 37934
Knox County (865) 675-1953

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 Merwin's NPI number?

The NPI number for William Merwin is 1215924691. It was assigned to this individual provider in the NPPES registry on September 30, 2005.

Where is William Merwin located?

William Merwin practices at 11201 West Point Dr Suite 103, Knoxville, TN 37934. The listed phone number is (865) 777-1727.

What is William Merwin's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is William Merwin enrolled in Medicare?

Yes. William Merwin is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for William Merwin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Merwin reassigns Medicare benefits to Otolaryngology Head And Neck Surgery Associates (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 William Merwin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Merwin was last updated on April 26, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.