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

Alexander K Larson, MD

Individual provider Gastroenterology Physician · NPI 1124349337

Alexander K Larson, MD practises Gastroenterology in Madison, Wisconsin. Qualified in 2010, 16 years ago. Practices with Dean Health Systems Inc, a 1,184-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
16
Licensed in
WI
In the registry since
2010
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

700 S Park St
Madison, WI 53715-1830
Phone: (608) 260-2900
Fax: (608) 260-2977
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 66867-20 (WI)

Record details

NPI number1124349337
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 22, 2010
Last updated in NPPESDecember 4, 2020
Certification dateDecember 4, 2020

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolOTHER
Graduated 2010 (16 years in practice)
Group practice Dean Health Systems Inc — 1184 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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.

Upper gastrointestinal (GI) endoscopy for acid reflux 356 times · 97th percentile
Colonoscopy 158 times · 90th 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.

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 patients363
Services billed 2,574 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

  • Stoughton Hospital Hospital · Stoughton, WI · listed as Stoughton Hospital Association
  • Ssm Health St Clare Hospital - Baraboo Hospital · Baraboo, WI
  • Ssm Health St Mary'S Hospital - Janesville Hospital · Janesville, WI
  • Ssm Health St Mary'S Hospital - Madison Hospital · Madison, WI

Colleagues at Dean Health Systems Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1184 clinicians in the practice; 12 are shown here.

Other providers in Madison