Mariellen Patricia Antman, APN-CNP
Nurse Practitioner (CMS) · Lake Forest, IL
At a glance
800 N Westmoreland Rd, Lake Forest, IL 60045-1673
NPPES record updated Oct 13, 2016. 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 Suite 205Lake Forest, IL 60045-1673
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2003
- CMS specialties
- Nurse Practitioner
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
Reported hospital affiliations
- Northwestern Lake Forest Hospital Lake Forest, IL
- Northwestern Medicine Central Dupage Hospital Winfield, IL
- Northwestern Memorial Hospital Chicago, IL
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.
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.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
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 |
|---|---|
| Food and beverage | $39.67 |
Reporting companies
| Company | Amount |
|---|---|
| ZOLL SERVICES LLC (A/K/A ZOLL LIFECOR CORP) | $39.67 |
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
- Nurse Practitioner (CMS)
- Taxonomy code
- 363LA2200X
- Enumeration date
- Feb 12, 2007
- Record updated
- Oct 13, 2016
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- APN-CNP
Reported taxonomies and licenses
163W00000X
License reported: 041202000 IL
363L00000X
License reported: 209005116 IL
363LA2200X · Primary
License reported: 209.005116 IL
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
800 N Westmoreland RdSuite 205
Lake Forest, IL 60045-1673
- Phone
- (847) 735-8550
- Fax
- (847) 535-8590
Mailing address
251 E HURON STCHICAGO, IL 606112908
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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