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

Individual provider Anesthesiology Physician · NPI 1356513006

Dr. Gregory Alan Wolff, MD practises Anesthesiology in Waukesha, Wisconsin. Graduated from University of Rochester School of Medicine and Dentistry in 2007, 19 years ago. Practices with Anex, SC, a 37-clinician group and accepts Medicare assignment. Licensed in Colorado and Wisconsin.

Years since qualifying
19
Trained at
University of Rochester School of Medicine and Dentistry
Licensed in
CO, WI
In the registry since
2008
Specialties on file
3
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

725 American Ave
Waukesha, WI 53188-5031
Phone: (262) 928-1000
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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 57318-20 (WI)
Anesthesiology Physician Taxonomy 207L00000X · Licence 49740 (CO)
Anesthesiology Physician Taxonomy 207L00000X · Licence 2549 (CO)

Record details

NPI number1356513006
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 1, 2008
Last updated in NPPESJune 12, 2025
Certification dateJune 12, 2025

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF ROCHESTER SCHOOL OF MEDICINE AND DENTISTRY
Graduated 2007 (19 years in practice)
Group practice Anex, S.C. — 37 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.

Pacemaker insertion or repair 1–10 times

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 patients171
Services billed 235 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.

Colleagues at Anex, SC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 37 clinicians in the practice; 12 are shown here.

Other providers in Waukesha