MARY K ZIELKE FNP
NPI 1467841338
Nurse Practitioner in Jacksonville, IL
About Mary K Zielke Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY K ZIELKE FNP (NPI 1467841338) is an individual nurse practitioner in Jacksonville, Illinois, licensed in Illinois (209012398) and active in the NPI registry since January 2015. She is enrolled in Medicare PECOS and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses
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
Mary K Zielke Fnp 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 Mary Zielke reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Springfield, IL 62702
- Reassigned Medicare billing, Illinois enrollment
- 645 clinicians in this Medicare group
Salem, MO 65560
- Reassigned Medicare billing, Missouri enrollment
- 27 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 62650 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
JACKSONVILLE, IL 62650
JACKSONVILLE, IL 62650
JACKSONVILLE, IL 62650
JACKSONVILLE, IL 62650
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 Mary Zielke's NPI number?
The NPI number for Mary Zielke is 1467841338. It was assigned to this individual provider in the NPPES registry on January 15, 2015.
Where is Mary Zielke located?
Mary Zielke practices at 1600 W Walnut St, Jacksonville, IL 62650. The listed phone number is (217) 245-7275.
What is Mary Zielke's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Mary Zielke enrolled in Medicare?
Yes. Mary Zielke 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 Mary Zielke's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Zielke reassigns Medicare benefits to 2 organizations: Siu Physicians & Surgeons, Inc (Springfield, IL) and South Central Missouri Community Health Center (Salem, MO). 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 Mary Zielke's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Zielke accept?
Health plans from UnitedHealthcare list Mary Zielke 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.
When was this NPI record last updated?
The NPPES record for Mary Zielke was last updated on June 18, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Mary K Zielke, FNP · NPI 1467841338
Nurse Practitioner physician in Jacksonville, Illinois. Individual provider, active in the CMS NPPES registry since January 15, 2015.
## Identity
- **NPI:** 1467841338 (Entity type: Individual)
- **Enumerated:** January 15, 2015
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 209012398 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 1600 W WALNUT ST, Jacksonville, IL 62650-1136
- **Phone:** (217) 245-7275
## 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): Siu Physicians & Surgeons, Inc (NPI 1558385989, Springfield, IL); South Central Missouri Community Health Center (NPI 1194615757, Salem, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** June 18, 2020
- **Other identifiers:** Medicaid 209012398 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1467841338) · Data from the CMS NPPES public registry.