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

Tatyana P Siminak, APNP

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1366196685

Tatyana P Siminak, APNP is a Nurse Practitioner in Mequon, Wisconsin. Qualified in 2021, 5 years ago. Practices with Cornerstone Counseling Services Inc, a 328-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Wisconsin.

Years since qualifying
5
Licensed in
WI
In the registry since
2022
Specialties on file
2
Claim this listing Report a problem Suggest an edit

Practice location Address checks out

11649 N Port Washington Rd Ste 221
Mequon, WI 53092-3461
Phone: (262) 912-1922
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence 11724 (WI)
Nurse Practitioner Taxonomy 363L00000X · Licence 11724 (WI)

Record details

NPI number1366196685
Entity typeIndividual (Type 1)
GenderFemale
Credentials APNP
Sole proprietorNo
NPI enumeratedFebruary 6, 2022
Last updated in NPPESMay 22, 2026
Certification dateMay 22, 2026

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Cornerstone Counseling Services Inc — 328 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients12
Services billed 90 a service is one billed item, such as a visit, a test or a procedure
Average patient age60

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.

Food and Beverage $283 10 payments · 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.

Colleagues at Cornerstone Counseling Services Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 328 clinicians in the practice; 12 are shown here.

Other providers in Mequon