John J Karl, FNP-C
Nurse Practitioner · Olympia Fields, IL
At a glance
3700 W 203Rd St Ste 302, Olympia Fields, IL 60461-1182
NPPES record updated Oct 5, 2023. 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
3700 W 203Rd St Ste 302Olympia Fields, IL 60461-1182
Additional reported practice locations
24 Joliet St Ste 302Dyer, IN 463111705
Phone: 2198522518
Fax: 2198642156
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2018
- CMS specialties
- Nurse Practitioner
Practice groups
Reported hospital affiliations
- Franciscan Health Dyer Dyer, IN
- Franciscan Health Olympia & Chicago Heights Olympia Fields, 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.
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
- Nurse Practitioner
- Taxonomy code
- 363L00000X
- Enumeration date
- Jan 5, 2007
- Record updated
- Oct 5, 2023
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- FNP-C
Reported taxonomies and licenses
163WR0006X
License reported: 041-258664 IL
163WR0006X
License reported: 71009040A IN
363L00000X
License reported: 28163347A IN
363L00000X
License reported: 041258664 IL
363L00000X
License reported: 71009040A IN
363LF0000X
License reported: 209.019289 IL
363L00000X · Primary
License reported: 209019289 IL
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
3700 W 203Rd St Ste 302Olympia Fields, IL 60461-1182
- Phone
- (708) 679-2518
- Fax
- (708) 679-2519
Mailing address
PO BOX 1000DYER, IN 463110800
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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