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

Gerald Mark Zenk, MD

Individual provider Anesthesiology Physician · NPI 1922291434

Gerald Mark Zenk, MD practises Anesthesiology in Park Ridge, Illinois. Qualified in 2007, 19 years ago. Practices with Northern Arizona Healthcare Corporation, a 395-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
19
Licensed in
IL
In the registry since
2007
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

1775 W Dempster St
Park Ridge, IL 60068-1143
Phone: (847) 723-2210
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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 036-118831 (IL)

Record details

NPI number1922291434
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 20, 2007
Last updated in NPPESFebruary 19, 2020
Certification dateFebruary 19, 2020

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Northern Arizona Healthcare Corporation — 395 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 patients234
Services billed 252 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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 Northern Arizona Healthcare Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 395 clinicians in the practice; 12 are shown here.

Other providers in Park Ridge