JULIA KARI CALLAHAN MSN, FNP-BC
NPI 1922999663
Nurse Practitioner - Family in Trenton, MI
About Julia Kari Callahan Msn, Fnp-bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JULIA KARI CALLAHAN MSN, FNP-BC (NPI 1922999663) is an individual family provider in Trenton, Michigan, licensed in Michigan (4704407553) and active in the NPI registry since July 2025. She is enrolled in Medicare PECOS and is a graduate of University Of Toledo College Of Medicine (2025).
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 (PECOS)
Julia Kari Callahan Msn, Fnp-bc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Julia Callahan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Trenton, MI 48183
- Reassigned Medicare billing, Michigan enrollment
- 5 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 48183 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 2
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 Julia Callahan's NPI number?
The NPI number for Julia Callahan is 1922999663. It was assigned to this individual provider in the NPPES registry on July 11, 2025.
Where is Julia Callahan located?
Julia Callahan practices at 1651 Kingsway Ct Ste A, Trenton, MI 48183. The listed phone number is (734) 671-2110.
What is Julia Callahan's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Julia Callahan enrolled in Medicare?
Yes. Julia Callahan is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Julia Callahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Julia Callahan reassigns Medicare benefits to Downriver Obstetrics And Gynecology Plc (Trenton, MI). The 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 Julia Callahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Julia Callahan accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 1 other insurer list Julia Callahan 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 Julia Callahan was last updated on July 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Julia Kari Callahan, MSN, FNP-BC · NPI 1922999663
Family physician in Trenton, Michigan. Individual provider, active in the CMS NPPES registry since July 11, 2025.
## Identity
- **NPI:** 1922999663 (Entity type: Individual)
- **Enumerated:** July 11, 2025
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 4704407553 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1651 KINGSWAY CT STE A, Trenton, MI 48183-1959
- **Phone:** (734) 671-2110
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Downriver Obstetrics And Gynecology Plc (NPI 1407939069, Trenton, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Toledo College Of Medicine, class of 2025
## Record status
- **NPPES last updated:** July 11, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1922999663) · Data from the CMS NPPES public registry.