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

Dr. Mark Steven Fixley, MD

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1487641569

Dr. Mark Steven Fixley, MD is a Critical Care Medicine (Internal Medicine) Physician in Oklahoma City, Oklahoma. Licensed in Oklahoma. Registered with an NPI since 2005.

Licensed in
OK
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

4050 W Memorial Rd Fl 3
Oklahoma City, OK 73120-8382
Phone: (405) 608-3800
Fax: (405) 608-1594
Show map & directions

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

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence 12889 (OK)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence 12889 (OK)

Record details

NPI number1487641569
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 4, 2005
Last updated in NPPESNovember 9, 2020
Certification dateNovember 9, 2020
Mailing address7800 Nw 85th Ter, Oklahoma City, OK 73132-3385

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