Mary Colleen Mahoney, LCSW, CADC
Mental Health Counselor · Chicago, IL
At a glance
155 N Michigan Ave Ste 380, Chicago, IL 60601-7710
NPPES record updated Feb 11, 2025. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
This clinician has a currently effective opt-out record in the imported CMS file. Ask the practice about payment arrangements before booking.
- Effective Apr 24, 2026 through Apr 24, 2028
Source: Opt Out Affidavits : 2026-08-01 · Reporting period: 2026-08-01 to 2026-08-31 · Published Sep 21, 2026.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
155 N Michigan Ave Ste 380Chicago, IL 60601-7710
Additional reported practice locations
870 N State St Apt 2NChicago, IL 606103333
Phone: 7082523706
Education & affiliations
No matching clinician background record in the imported CMS release.
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Mental Health Counselor
- Taxonomy code
- 101YM0800X
- Enumeration date
- Aug 11, 2022
- Record updated
- Feb 11, 2025
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- LCSW, CADC
Reported taxonomies and licenses
101YA0400X
License reported: 35837 IL
101YM0800X · Primary
License reported: 149.023334 IL
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
155 N Michigan Ave Ste 380Chicago, IL 60601-7710
- Phone
- (773) 340-2616
Mailing address
870 N STATE ST APT 2NCHICAGO, IL 606103333
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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