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DR. REGAN FRANCES WILLIAMS M.D.
NPI 1639392400
Surgery in Memphis, TN

Active since April 10, 2007PECOS Enrolled
51 N DUNLAP ST STE 230, MEMPHIS, TN 38105(901) 448-5364 Get Directions Write a Review

NPPES record last updated: March 26, 2020. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Mar 26, 2020, Jun 21, 2016 (2 updates tracked since 2016).

About Dr. Regan Frances Williams M.d. NPPES

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

DR. REGAN FRANCES WILLIAMS M.D. (NPI 1639392400) is an individual surgery provider in Memphis, Tennessee, licensed in Tennessee (390200000X) and active in the NPI registry since April 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1639392400
Entity TypeIndividualFemale
Primary Taxonomy208600000X
Provider Legal NameDR. REGAN FRANCES WILLIAMSCredential: M.D.
Location Address51 N DUNLAP ST STE 230Memphis, TN 38105-4625
Mailing Address49 N Dunlap St, Fl 2Memphis, TN 38103-2802 · (901) 355-0999
Phone(901) 448-5364
Sole ProprietorNo
Enumeration DateApril 10, 2007
Last NPPES UpdateMarch 26, 20202 updates tracked since enumeration
NPPES CertifiedMarch 26, 2020
✔ NPI 1639392400 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in TN · 390200000X
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
51 N DUNLAP ST STE 230, Memphis, TN 38105
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BlueCross BlueShield of Tennessee.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Regan Frances Williams 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 Regan Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ut Lebonheur Pediatric Specialists, Inc.
0.1 mi
Pediatrics
848 ADAMS AVE.
Memphis, TN 38103
  • Reassigned Medicare billing, Tennessee enrollment
  • 582 clinicians in this Medicare group
NPI 1093024101 (901) 287-7337

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 38105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$81.53 typical visit price
range $52.64 – $160.89
Typical copayment $20.38 (range $13.16 – $40.22)
Most-billed visit code 99203
Established Patient
$66.01 typical visit price
range $16.72 – $131.41
Typical copayment $16.50 (range $4.18 – $32.85)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Regan Williams's NPI number?

The NPI number for Regan Williams is 1639392400. It was assigned to this individual provider in the NPPES registry on April 10, 2007.

Where is Regan Williams located?

Regan Williams practices at 51 N Dunlap St Ste 230, Memphis, TN 38105. The listed phone number is (901) 448-5364.

What is Regan Williams's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Regan Williams enrolled in Medicare?

Yes. Regan Williams is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Regan Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Regan Williams reassigns Medicare benefits to Ut Lebonheur Pediatric Specialists, Inc. (Memphis, 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 Regan Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Regan Williams accept?

Health plans from BlueCross BlueShield of Tennessee list Regan Williams 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 Regan Williams was last updated on March 26, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.