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

Alexander Michael Mason, MD

Individual provider Neurological Surgery Physician · NPI 1275758039

Alexander Michael Mason, MD practises Neurosurgery in Saint Paul, Minnesota. Graduated from Ohio State University College of Medicine in 2000, 26 years ago. Practices with Intermountain Medical Group Denver LLC, a 567-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Colorado, Minnesota, Ohio and South Carolina.

Years since qualifying
26
Trained at
Ohio State University College of Medicine
Licensed in
CO, MN, OH, SC
In the registry since
2007
Specialties on file
4
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

640 Jackson St
Saint Paul, MN 55101-2502
Phone: (651) 495-6600
Fax: (651) 254-3123
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Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (1)

  • 4743 Arapahoe Ve, Boulder, CO 80303 — (303) 938-5700

Specialties & licences

Neurological Surgery Physician (primary) Taxonomy 207T00000X · Licence 96060 (SC)
Neurological Surgery Physician Taxonomy 207T00000X · Licence 59933 (MN)
Neurological Surgery Physician Taxonomy 207T00000X · Licence DR-46397 (CO)
Neurological Surgery Physician Taxonomy 207T00000X · Licence 57002649 (OH)

Record details

NPI number1275758039
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 16, 2007
Last updated in NPPESJanuary 19, 2026
Certification dateJanuary 19, 2026

Medicare enrollment

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

Medicare specialtyNEUROSURGERY
Medical schoolOHIO STATE UNIVERSITY COLLEGE OF MEDICINE
Graduated 2000 (26 years in practice)
Group practice Intermountain Medical Group Denver Llc — 567 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Spinal fusion 21 times · 38th percentile
Laminectomy or laminotomy (partial removal of spine bones) 12 times · 36th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 $24 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. Those with a page here are linked.

  • Trident Medical Center Hospital · Charleston, SC · listed as Trident Medical Center, LLC
  • Intermountain Health Lutheran Hospital Hospital · Wheat Ridge, CO

Colleagues at Intermountain Medical Group Denver LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 567 clinicians in the practice; 12 are shown here.

Other providers in Saint Paul