MARK L WILLIAMS MD
NPI 1679505440
Anesthesiology in Dallas, TX
About Mark L Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK L WILLIAMS MD (NPI 1679505440) is an individual anesthesiology provider in Dallas, Texas, licensed in Texas (U4048) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Methodist Richardson Medical Center, and maintains a secondary practice location in Phoenix.
NPPES Registry Identity
Specialties & Licenses
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mark L Williams 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.
Areas of Expertise CMS Part B claims 3
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.
Methodist Richardson Medical Center
Acute Care Hospitals · Richardson, TXMedicare 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.
Reported Quality Measures
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.
DALLAS, TX 75251
DALLAS, TX 75251
DALLAS, TX 75251
DALLAS, TX 75251
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 Mark Williams's NPI number?
The NPI number for Mark Williams is 1679505440. It was assigned to this individual provider in the NPPES registry on July 6, 2006.
Where is Mark Williams located?
Mark Williams practices at 12222 Merit Dr Ste 600, Dallas, TX 75251. The listed phone number is (972) 715-5000.
What is Mark Williams's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Mark Williams enrolled in Medicare?
Yes. Mark Williams 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.
What insurance does Mark Williams accept?
Health plans from Blue Cross Blue Shield of Arizona and Oscar Health Plan, Inc. list Mark 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.
Is Mark Williams affiliated with any hospitals?
According to CMS data, Mark Williams is affiliated with Methodist Richardson Medical Center.
When was this NPI record last updated?
The NPPES record for Mark Williams was last updated on April 22, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.
