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

Grant Comstock

Individual provider Medical Toxicology (Emergency Medicine) Physician · NPI 1235591439

Grant Comstock practises Emergency Medicine in Milwaukee, Wisconsin. Graduated from University of Cincinnati College of Medicine in 2016, 10 years ago. Practices with The Medical College of Wisconsin Inc, a 2,093-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
10
Trained at
University of Cincinnati College of Medicine
Licensed in
WI
In the registry since
2016
Specialties on file
2
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Practice location Address checks out

9200 W Wisconsin Ave
Milwaukee, WI 53226-3522
Phone: (414) 955-6450
Fax: (414) 955-0082
Show map & directions

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

Additional practice locations (1)

  • 4805 S Moorland Rd, New Berlin, WI 53151-7401 — (262) 796-0001

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 76917 (WI)
Medical Toxicology (Emergency Medicine) Physician Taxonomy 207PT0002X · Licence 76917 (WI)

Record details

NPI number1235591439
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMarch 25, 2016
Last updated in NPPESNovember 4, 2022
Certification dateNovember 4, 2022

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Also practisesMEDICAL TOXICOLOGY
Medical schoolUNIVERSITY OF CINCINNATI COLLEGE OF MEDICINE
Graduated 2016 (10 years in practice)
Group practice The Medical College Of Wisconsin Inc — 2093 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 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 patients210
Services billed 313 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Colleagues at The Medical College of Wisconsin Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2093 clinicians in the practice; 12 are shown here.

Other providers in Milwaukee