Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mark L Williams, MD

Individual provider Anesthesiology Physician · NPI 1679505440

Mark L Williams, MD is an Anesthesiology in Dallas, Texas. Qualified in 1986, 40 years ago. Practices with U S Anesthesia Partners of Texas, PA, a 2,747-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arizona and Texas.

Years since qualifying
40
Licensed in
AZ, TX
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

12222 Merit Dr Ste 600
Dallas, TX 75251-3294
Phone: (972) 715-5000
Fax: (972) 715-9976
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 250 E Dunlap Ave, Phoenix, AZ 85020 — (602) 273-9333

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence U4048 (TX)
Anesthesiology Physician Taxonomy 207L00000X · Licence 22063 (AZ)

Record details

NPI number1679505440
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 6, 2006
Last updated in NPPESApril 22, 2026
Certification dateApril 22, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 1986 (40 years in practice)
Group practice U S Anesthesia Partners Of Texas, Pa — 2747 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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