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HALLIE JEAN WILLIS FNP-C
NPI 1154107654
Nurse Practitioner - Family in Osage Beach, MO

Active since August 31, 2023PECOS EnrolledAccepts Medicare Assignment
54 HOSPITAL DR, OSAGE BEACH, MO 65065(573) 302-2715(573) 302-2713 Get Directions Write a Review

NPPES record last updated: November 4, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Nov 4, 2025, Aug 31, 2023 (2 updates tracked since 2023).

About Hallie Jean Willis Fnp-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

HALLIE JEAN WILLIS FNP-C (NPI 1154107654) is an individual family provider in Osage Beach, Missouri, licensed in Missouri (2023036914) and active in the NPI registry since August 2023. She is enrolled in Medicare PECOS, is affiliated with Lake Regional Health System, and is a graduate of Other (2023).

NPPES Registry Identity

NPI1154107654
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameHALLIE JEAN WILLISCredential: FNP-C
Location Address54 HOSPITAL DROsage Beach, MO 65065-3050
Mailing Address54 Hospital DrOsage Beach, MO 65065-3050 · (573) 302-2715 · Fax (573) 302-2713
Phone(573) 302-2715
Fax(573) 302-2713
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateAugust 31, 2023
Last NPPES UpdateNovember 4, 20252 updates tracked since enumeration
NPPES CertifiedNovember 4, 2025
✔ NPI 1154107654 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in MO · 2023036914
54 HOSPITAL DR, Osage Beach, MO 65065
Open in Google Maps ↗

Other Names 1

Former Name (1)Hallie Mills

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter Health and more.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

Hallie Jean Willis 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.

PECOS PAC ID9638526478
PECOS Enrollment IDI20231115002900
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Hallie Willis reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Lake Regional Health System
Same address
Emergency Medical Services
54 HOSPITAL DR
Osage Beach, MO 65065
  • Reassigned Medicare billing, Missouri enrollment
  • 149 clinicians in this Medicare group
NPI 1053581454 (573) 348-8000
Lake Regional Medical Management, Inc.
Same address
Multi-Specialty
54 HOSPITAL DR
Osage Beach, MO 65065
  • Reassigned Medicare billing, Missouri enrollment
  • 41 clinicians in this Medicare group
NPI 1639134158 (573) 348-8074

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 3

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
505 services447 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
61 services61 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
16 services16 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Lake Regional Health System

Acute Care Hospitals · Osage Beach, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number260186
Location54 Hospital DriveOsage Beach, MO 65065 · Camden County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 65065 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$81.64 typical visit price
range $52.28 – $161.24
Typical copayment $20.41 (range $13.07 – $40.31)
Most-billed visit code 99203
Established Patient
$93.24 typical visit price
range $16.30 – $131.05
Typical copayment $23.31 (range $4.07 – $32.76)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

CAMDEN EMERGENCY GROUP LLC
Emergency Medicine
54 HOSPITAL DR
OSAGE BEACH, MO 65065
Camden County (573) 348-8000
MR. DENNIS LEE KEMPF JR. MS, CEP, EP, EIM
Clinical Exercise Physiologist
54 HOSPITAL DR
OSAGE BEACH, MO 65065
Camden County (573) 302-2280
LAKE OF THE OZARKS PAIN MANAGEMENT SERVICES, INC
Specialist
54 HOSPITAL DR
OSAGE BEACH, MO 65065
Camden County (573) 302-1661
JACOB ANDREW WHITE PA-C
Physician Assistant
54 HOSPITAL DR
OSAGE BEACH, MO 65065
Camden County (660) 888-2238
JAMES V VEST MD
Internal Medicine (Pulmonary Disease)
54 HOSPITAL DR, SUITE 205
OSAGE BEACH, MO 65065
Camden County (573) 302-3199
BRENDA HUGHES KREUTER PT,CHT
Physical Therapist (Hand)
54 HOSPITAL DR
OSAGE BEACH, MO 65065
Camden County (573) 302-2230
CATHY A SPETEK RD LD
Dietitian, Registered
54 HOSPITAL DR
OSAGE BEACH, MO 65065
Camden County (573) 348-8376
CHRISTOPHER ERIC VANDIVER CRNA
Nurse Anesthetist, Certified Registered
54 HOSPITAL DR
OSAGE BEACH, MO 65065
Camden County (573) 302-1661

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 Hallie Willis's NPI number?

The NPI number for Hallie Willis is 1154107654. It was assigned to this individual provider in the NPPES registry on August 31, 2023. The provider is also known as Hallie Mills.

Where is Hallie Willis located?

Hallie Willis practices at 54 Hospital Dr, Osage Beach, MO 65065. The listed phone number is (573) 302-2715.

What is Hallie Willis's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Hallie Willis enrolled in Medicare?

Yes. Hallie Willis 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 Hallie Willis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hallie Willis reassigns Medicare benefits to 2 organizations: Lake Regional Health System (Osage Beach, MO) and Lake Regional Medical Management, Inc. (Osage Beach, 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 Hallie Willis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Hallie Willis accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter of Oklahoma and Ambetter of Tennessee and 3 other insurers list Hallie Willis 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 Hallie Willis affiliated with any hospitals?

According to CMS data, Hallie Willis is affiliated with Lake Regional Health System.

When was this NPI record last updated?

The NPPES record for Hallie Willis was last updated on November 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.