Mary Maish, MD
NPI 1750316774 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Lake Forest, IL
Enrolled with Medicare as Practitioner - Thoracic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Maish, MD is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Lake Forest, IL (NPI 1750316774).
Provider details
- NPI number
- 1750316774
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301513301 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
4 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Omeprazole | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$683 across 13 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 39141 Civic Center DrFremont, CA 94538-5818Phone: (510) 248-1400Fax: (510) 797-0301
- 3900 St Francis Way Ste 200Lafayette, IN 47905-4940Phone: (765) 775-2800Fax: (765) 775-2831
- 601 John St Ste M-460Kalamazoo, MI 49007-5355Phone: (269) 341-7333
Registry dates
- Enumerated
- 2006-07-11
- Last updated
- 2025-08-25
- Certified
- 2025-08-25
Frequently asked questions
- What is Mary Maish's NPI number?
- Mary Maish's National Provider Identifier (NPI) is 1750316774, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Maish's specialty?
- Mary Maish is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Maish located?
- Mary Maish's practice location on file with NPPES is 800 N Westmoreland Rd Ste 100, Lake Forest, IL 60045-1671.
- What is Mary Maish's phone number?
- The practice phone number listed in the NPPES registry for Mary Maish is (224) 271-4650.
- Does Mary Maish accept Medicare?
- Mary Maish is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Maish's NPI active?
- Yes — Mary Maish's NPI (1750316774) is active in the NPPES registry as of the last update on 2025-08-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.