DR. WILLIAM LASSITER MD
NPI 1083005417
Anesthesiology in Fayetteville, AR
About Dr. William Lassiter Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM LASSITER MD (NPI 1083005417) is an individual anesthesiology provider in Fayetteville, Arkansas, licensed in Arkansas (E-16955) and active in the NPI registry since February 2015. He is enrolled in Medicare PECOS and is a graduate of University Of Arkansas College Of Medicine (2015).
NPPES Registry Identity
Specialties & Licenses 2
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
Dr. William Lassiter 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 Reassignments
4Medicare enrollment records show William Lassiter reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fayetteville, AR 72703
- Reassigned Medicare billing, Arkansas enrollment
- 185 clinicians in this Medicare group
Fort Smith, AR 72903
- Reassigned Medicare billing, Arkansas enrollment
- 168 clinicians in this Medicare group
Pensacola, FL 32502
- Reassigned Medicare billing, Texas enrollment
- 432 clinicians in this Medicare group
El Paso, TX 79911
- Reassigned Medicare billing, Texas enrollment
- 196 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
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.
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 Lassiter's NPI number?
The NPI number for William Lassiter is 1083005417. It was assigned to this individual provider in the NPPES registry on February 6, 2015.
Where is William Lassiter located?
William Lassiter practices at 248 Napa Dr, Fayetteville, AR 72703. The listed phone number is (870) 217-1031.
What is William Lassiter's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is William Lassiter enrolled in Medicare?
Yes. William Lassiter 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 organizations bill Medicare for William Lassiter's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Lassiter reassigns Medicare benefits to 4 organizations: Premier Anesthesia Of Arkansas Professional Corporation (Fayetteville, AR), Renew Medical Group Of Arkansas Ltd (Fort Smith, AR), Texas Ams PLLC (Pensacola, FL) and El Paso Ams, PLLC (El Paso, TX). Each 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 Lassiter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Lassiter accept?
Health plans from Blue Cross and Blue Shield of Texas, Health Advantage and Octave list William Lassiter 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 William Lassiter was last updated on February 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.
# Dr. William Lassiter, MD · NPI 1083005417
Anesthesiology physician in Fayetteville, Arkansas. Individual provider, active in the CMS NPPES registry since February 6, 2015.
## Identity
- **NPI:** 1083005417 (Entity type: Individual)
- **Enumerated:** February 6, 2015
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** E-16955 (Arkansas)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 248 NAPA DR, Fayetteville, AR 72703-9747
- **Phone:** (870) 217-1031
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Premier Anesthesia Of Arkansas Professional Corporation (NPI 1932519485, Fayetteville, AR); Renew Medical Group Of Arkansas Ltd (NPI 1215755947, Fort Smith, AR); Texas Ams PLLC (NPI 1174926125, Pensacola, FL); El Paso Ams, PLLC (NPI 1134740202, El Paso, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Arkansas College Of Medicine, class of 2015
## Record status
- **NPPES last updated:** February 1, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1083005417) · Data from the CMS NPPES public registry.