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

Q: 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.

Q: What is Hallie Willis's specialty?

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

Q: 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 10 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.

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: September 06, 2026.

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

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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

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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 Home State Health, Ambetter from Sunflower Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

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.

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.

What insurance does Hallie Willis accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 4 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 10 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.