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

Dr. Brennan Michael McMillan, MD

Individual provider Anesthesiology Physician · NPI 1235659392

Dr. Brennan Michael McMillan, MD practises Anesthesiology in Saint Louis, Missouri. Graduated from Albany Medical College of Union University in 2017, 9 years ago. Practices with Washington University, a 2,986-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
9
Trained at
Albany Medical College of Union University
Licensed in
MO
In the registry since
2017
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

1 Barnes Jewish Hospital Plz Dept Anesthesiology
Saint Louis, MO 63110-1003
Phone: (800) 862-9980
Fax: (314) 362-1185
Show map & directions

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

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 2019024480 (MO)

Record details

NPI number1235659392
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 20, 2017
Last updated in NPPESApril 17, 2025
Certification dateMay 11, 2021

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolALBANY MEDICAL COLLEGE OF UNION UNIVERSITY
Graduated 2017 (9 years in practice)
Group practice Washington University — 2986 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients30
Services billed 41 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Washington University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2986 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis