Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Daniel Robert O'Brien

Individual provider Anesthesiologist Assistant · NPI 1659146082

Daniel Robert O'Brien is an Anesthesiology Assistant in Saint Louis, Missouri. Graduated from University of Colorado School of Medicine, Denver in 2023, 3 years ago. Practices with Midwest Anesthesia Providers SC, a 182-clinician group and accepts Medicare assignment.

Years since qualifying
3
Trained at
University of Colorado School of Medicine, Denver
In the registry since
2023
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Practice location Address checks out

11133 Dunn Rd
Saint Louis, MO 63136-6163
Phone: (800) 392-0936
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiologist Assistant (primary) Taxonomy 367H00000X

Record details

NPI number1659146082
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedNovember 15, 2023
Last updated in NPPESNovember 15, 2023
Certification dateNovember 15, 2023

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY ASSISTANT
Medical schoolUNIVERSITY OF COLORADO SCHOOL OF MEDICINE, DENVER
Graduated 2023 (3 years in practice)
Group practice Midwest Anesthesia Providers Sc — 182 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $19 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Midwest Anesthesia Providers SC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 182 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis