Mary S Maish, MD
Thoracic Surgery (CMS) · Lake Forest, IL
At a glance
800 N Westmoreland Rd Ste 100, Lake Forest, IL 60045-1671
Published activity: Upper gastrointestinal (GI) endoscopy for acid reflux. View counts and coverage
NPPES record updated Aug 25, 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
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
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
800 N Westmoreland Rd Ste 100Lake Forest, IL 60045-1671
Additional reported practice locations
39141 Civic Center DrFremont, CA 945385818
Phone: 5102481400
Fax: 5107970301 601 John St Ste M-460
Kalamazoo, MI 490075355
Phone: 2693417333 3900 St Francis Way Ste 200
Lafayette, IN 479054940
Phone: 7657752800
Fax: 7657752831
Education & affiliations
- Medical / professional school
- Rush Medical College Of Rush University
- Graduation year
- 1999
- CMS specialties
- Thoracic Surgery
Practice groups
Reported hospital affiliations
- Franciscan Health Indianapolis Indianapolis, IN
- Franciscan Health Lafayette Lafayette, IN
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.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Upper gastrointestinal (GI) endoscopy for acid reflux | 1-10 |
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
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Consulting fee | $850.00 |
| Food and beverage | $26.09 |
Reporting companies
| Company | Amount |
|---|---|
| OLYMPUS WINTER & IBE GMBH | $850.00 |
| MERCK SHARP & DOHME LLC | $26.09 |
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
- Thoracic Surgery (CMS)
- Taxonomy code
- 208G00000X
- Enumeration date
- Jul 11, 2006
- Record updated
- Aug 25, 2025
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
208G00000X
License reported: 4301513301 MI
208G00000X
License reported: 01096488A IN
208G00000X · Primary
License reported: 036147674 IL
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
800 N Westmoreland Rd Ste 100Lake Forest, IL 60045-1671
- Phone
- (224) 271-4650
- Fax
- (224) 234-4336
Mailing address
800 N WESTMORELAND RD STE 100LAKE FOREST, IL 600451671
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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