Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mary Tate, MDMPH

Individual provider Obstetrics & Gynecology Physician · NPI 1306349105

Mary Tate, MDMPH practises Obstetrics/Gynecology in Chicago, Illinois. Graduated from Harvard Medical School in 2018, 8 years ago. Practices with Cook County, a 787-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
8
Trained at
Harvard Medical School
Licensed in
IL
In the registry since
2018
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Practice location Address checks out

1969 W Ogden Ave
Chicago, IL 60612-3765
Phone: (312) 864-4963
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 251 E Huron St, Chicago, IL 60611-2908 — (312) 926-2000

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 036.161261 (IL)

Record details

NPI number1306349105
Entity typeIndividual (Type 1)
GenderFemale
Credentials MDMPH
Sole proprietorNo
NPI enumeratedMarch 18, 2018
Last updated in NPPESSeptember 28, 2022
Certification dateSeptember 28, 2022

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 2018 (8 years in practice)
Group practice Cook County — 787 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients21
Services billed 28 a service is one billed item, such as a visit, a test or a procedure
Average patient age66

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Education $1,000 1 payment · educational material or training, not a fee
Food and Beverage $125 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Cook County

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 787 clinicians in the practice; 12 are shown here.

Other providers in Chicago