CARRIE LYNN MILLSTEAD FNP
NPI 1598442113
Nurse Practitioner - Family in Stillwater, OK
About Carrie Lynn Millstead Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CARRIE LYNN MILLSTEAD FNP (NPI 1598442113) is an individual family provider in Stillwater, Oklahoma, licensed in Montana (NUR-APRN-LIC-216218) and active in the NPI registry since July 2023. She is enrolled in Medicare PECOS and is a graduate of Other (2023).
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
Carrie Lynn Millstead 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 Carrie Millstead reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Tulsa, OK 74104
- Reassigned Medicare billing, Oklahoma enrollment
- 35 clinicians in this Medicare group
Polson, MT 59860
- Reassigned Medicare billing, Montana enrollment
- 111 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 74074 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 3
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 Carrie Millstead's NPI number?
The NPI number for Carrie Millstead is 1598442113. It was assigned to this individual provider in the NPPES registry on July 5, 2023.
Where is Carrie Millstead located?
Carrie Millstead practices at 275 S Perkins Rd, Stillwater, OK 74074. The listed phone number is (405) 334-5272.
What is Carrie Millstead's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Carrie Millstead enrolled in Medicare?
Yes. Carrie Millstead 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 Carrie Millstead's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Carrie Millstead reassigns Medicare benefits to 2 organizations: Hillcrest Urgent Care, LLC (Tulsa, OK) and Providence St Joseph Medical Center (Polson, MT). 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 Carrie Millstead's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Carrie Millstead accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 2 other insurers list Carrie Millstead 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 Carrie Millstead was last updated on May 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Carrie Lynn Millstead, FNP · NPI 1598442113
Family physician in Stillwater, Oklahoma. Individual provider, active in the CMS NPPES registry since July 5, 2023.
## Identity
- **NPI:** 1598442113 (Entity type: Individual)
- **Enumerated:** July 5, 2023
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** NUR-APRN-LIC-216218 (Montana)
- **Sole proprietor:** No
## Practice location
- **Address:** 275 S PERKINS RD, Stillwater, OK 74074-3665
- **Phone:** (405) 334-5272
## 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): Hillcrest Urgent Care, LLC (NPI 1417769829, Tulsa, OK); Providence St Joseph Medical Center (NPI 1669655528, Polson, MT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2023
## Record status
- **NPPES last updated:** May 26, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1598442113) · Data from the CMS NPPES public registry.