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

William Larsen

Individual provider Medical Physician Assistant · NPI 1356711584

William Larsen is a Physician Assistant in Elk Grove Village, Illinois. Qualified in 2015, 11 years ago. Practices with Bonaventure Medical Foundation LLC, a 165-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
11
Licensed in
IL
In the registry since
2015

Practice location Address checks out

800 Biesterfield Rd
Elk Grove Village, IL 60007-3361
Phone: (847) 437-5500
Show map & directions

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

Additional practice locations (1)

  • 5841 S Maryland Ave, Chicago, IL 60637-1443 — (773) 702-1000

Specialties & licences

Medical Physician Assistant (primary) Taxonomy 363AM0700X · Licence 085005642 (IL)

Record details

NPI number1356711584
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedSeptember 30, 2015
Last updated in NPPESSeptember 27, 2024
Certification dateSeptember 27, 2024

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Bonaventure Medical Foundation Llc — 165 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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 patients83
Services billed 133 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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.

Colleagues at Bonaventure Medical Foundation LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 165 clinicians in the practice; 12 are shown here.

Other providers in Elk Grove Village