MS. AMY L MAYERNIK MSN FNP-C
NPI 1255770749
Nurse Practitioner - Family in Warsaw, IN
About Ms. Amy L Mayernik Msn Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. AMY L MAYERNIK MSN FNP-C (NPI 1255770749) is an individual family provider in Warsaw, Indiana, licensed in Indiana (71004465A) and active in the NPI registry since June 2013. She is enrolled in Medicare PECOS and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses
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
Ms. Amy L Mayernik Msn 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
4Medicare enrollment records show Amy Mayernik reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint John, IN 46373
- Reassigned Medicare billing, Indiana enrollment
- 55 clinicians in this Medicare group
Indianapolis, IN 46220
- Reassigned Medicare billing, Florida, Illinois and Indiana enrollments
- Medicare enrollment name: Cityblock Medical Practice PA
- 41 clinicians in this Medicare group
Lansing, MI 48911
- Reassigned Medicare billing, Michigan enrollment
- 90 clinicians in this Medicare group
Naperville, IL 60563
- Reassigned Medicare billing, Colorado, Connecticut, District of Columbia, Florida, Illinois, Kentucky, Missouri, North Carolina, Ohio and Tennessee enrollments
- 51 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 46580 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 4
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 Amy Mayernik's NPI number?
The NPI number for Amy Mayernik is 1255770749. It was assigned to this individual provider in the NPPES registry on June 18, 2013.
Where is Amy Mayernik located?
Amy Mayernik practices at 100 N Detroit St, Warsaw, IN 46580. The listed phone number is (574) 267-6208.
What is Amy Mayernik's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Amy Mayernik enrolled in Medicare?
Yes. Amy Mayernik 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 Amy Mayernik's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Amy Mayernik reassigns Medicare benefits to 4 organizations: In Post Acute Specialists, PC (Saint John, IN), Cityblock Medical Practice, P.A. (Indianapolis, IN), Mi Post Acute Specialists PC (Lansing, MI) and Post Acute Specialists, LLC (Naperville, IL). 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 Amy Mayernik's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Amy Mayernik accept?
Health plans from CareSource, Molina Healthcare and Priority Health list Amy Mayernik 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 Amy Mayernik was last updated on May 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.
# Ms. Amy L Mayernik, MSN FNP-C · NPI 1255770749
Family physician in Warsaw, Indiana. Individual provider, active in the CMS NPPES registry since June 18, 2013.
## Identity
- **NPI:** 1255770749 (Entity type: Individual)
- **Enumerated:** June 18, 2013
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 71004465A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 N DETROIT ST, Warsaw, IN 46580-3329
- **Phone:** (574) 267-6208
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): In Post Acute Specialists, PC (NPI 1629584396, Saint John, IN); Cityblock Medical Practice, P.A. (NPI 1588296784, Indianapolis, IN); Mi Post Acute Specialists PC (NPI 1013425479, Lansing, MI); Post Acute Specialists, LLC (NPI 1114441565, Naperville, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** May 7, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1255770749) · Data from the CMS NPPES public registry.