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

Individual provider Anesthesiology Physician · NPI 1033256318

Michael O'Callaghan, MD is an Anesthesiology in Denver, Colorado. Graduated from University of Kansas School of Med (KC/WICH/SAL) in 2006, 20 years ago. Practices with US Anesthesia Partners of Colorado Inc, a 479-clinician group and accepts Medicare assignment. Licensed in Colorado.

Years since qualifying
20
Trained at
University of Kansas School of Med (KC/WICH/SAL)
Licensed in
CO
In the registry since
2007
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

455 Sherman St Ste 510
Denver, CO 80203-4400
Phone: (303) 377-6825
Fax: (303) 780-0787
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 52481 (CO)

Record details

NPI number1033256318
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 30, 2007
Last updated in NPPESAugust 12, 2013

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF KANSAS SCHOOL OF MED (KC/WICH/SAL)
Graduated 2006 (20 years in practice)
Group practice Us Anesthesia Partners Of Colorado Inc — 479 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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