JOHN J KARL FNP-C
NPI 1487701728
Nurse Practitioner in Olympia Fields, IL
About John J Karl Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN J KARL FNP-C (NPI 1487701728) is an individual nurse practitioner in Olympia Fields, Illinois, licensed in Illinois (209019289) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, is affiliated with Franciscan Health Olympia & Chicago Heights, and maintains a secondary practice location in Dyer.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John J Karl Fnp-c is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show John Karl reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Frankfort, IL 60423
- Reassigned Medicare billing, Illinois enrollment
- 148 clinicians in this Medicare group
Mishawaka, IN 46544
- Reassigned Medicare billing, Indiana enrollment
- 1,396 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Franciscan Health Olympia & Chicago Heights
Acute Care Hospitals · Olympia Fields, ILFranciscan Health Dyer
Acute Care Hospitals · Dyer, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60461 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Karl's NPI number?
The NPI number for John Karl is 1487701728. It was assigned to this individual provider in the NPPES registry on January 5, 2007.
Where is John Karl located?
John Karl practices at 3700 W 203rd St Ste 302, Olympia Fields, IL 60461. The listed phone number is (708) 679-2518.
What is John Karl's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is John Karl enrolled in Medicare?
Yes. John Karl is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Karl's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Karl reassigns Medicare benefits to 2 organizations: Specialty Physicians Of Illinois, LLC (Frankfort, IL) and Franciscan Physician Network (Mishawaka, IN). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Karl's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Karl accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian and CareSource list John Karl as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is John Karl affiliated with any hospitals?
According to CMS data, John Karl is affiliated with Franciscan Health Olympia & Chicago Heights and Franciscan Health Dyer.
When was this NPI record last updated?
The NPPES record for John Karl was last updated on October 5, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John J Karl, FNP-C · NPI 1487701728
Nurse Practitioner physician in Olympia Fields, Illinois. Individual provider, active in the CMS NPPES registry since January 5, 2007.
## Identity
- **NPI:** 1487701728 (Entity type: Individual)
- **Enumerated:** January 5, 2007
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 209019289 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 3700 W 203RD ST STE 302, Olympia Fields, IL 60461-1182
- **Phone:** (708) 679-2518 · **Fax:** (708) 679-2519
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Specialty Physicians Of Illinois, LLC (NPI 1962024612, Frankfort, IL); Franciscan Physician Network (NPI 1366879009, Mishawaka, IN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** October 5, 2023
- **Other identifiers:** Other 209.019289 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1487701728) · Data from the CMS NPPES public registry.