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

Mary Susan Sandrik, MSN, RN, CWOCN

Individual provider Clinical Nurse Specialist · NPI 1154616928

Mary Susan Sandrik, MSN, RN, CWOCN is registered under Certified Clinical Nurse Specialist (Cns) in Chicago, Illinois. Qualified in 1998, 28 years ago. Practices with Mount Sinai Community Foundation, a 246-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
28
Licensed in
IL
In the registry since
2011
What do these letters mean?
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

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Practice location Address checks out

1500 S California Ave
Chicago, IL 60608 Not confirmed with CMS for 15 years — call before visiting
Phone: (773) 542-2000
Fax: (773) 257-5205
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Nurse Specialist (primary) Taxonomy 364S00000X · Licence 309.000463 (IL)

Record details

NPI number1154616928
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSN , RN , CWOCN
Sole proprietorYes
NPI enumeratedJune 9, 2011
Last updated in NPPESJune 9, 2011

Medicare enrollment

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

Medicare specialtyCERTIFIED CLINICAL NURSE SPECIALIST (CNS)
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Mount Sinai Community Foundation — 246 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 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 patients132
Services billed 190 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.

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 $318 3 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Mount Sinai Community Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 246 clinicians in the practice; 12 are shown here.

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