1. Home
  2. Directory
  3. Mississippi
  4. Booneville
  5. Psychiatry Neurology
  6. NPI Profile

MALLIE MARIE DENNIS MD
NPI 1942880646
Psychiatry & Neurology - Psychiatry in Booneville, MS

Active since April 08, 2021PECOS EnrolledAccepts Medicare Assignment
100 HOSPITAL ST, BOONEVILLE, MS 38829(662) 720-5000 Get Directions Write a Review

NPPES record last updated: September 30, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jun 23, 2025, Apr 15, 2021, Apr 8, 2021 (3 updates tracked since 2021).

About Mallie Marie Dennis Md NPPES

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

MALLIE MARIE DENNIS MD (NPI 1942880646) is an individual psychiatry provider in Booneville, Mississippi, licensed in Mississippi (34904) and active in the NPI registry since April 2021. She is enrolled in Medicare PECOS, is affiliated with Baptist Memorial Hospital Booneville, and is a graduate of University Of Tennessee, Hsc, College Of Medicine (2021).

NPPES Registry Identity

NPI1942880646
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameMALLIE MARIE DENNISCredential: MD
Location Address100 HOSPITAL STBooneville, MS 38829-3354
Mailing Address350 N Humphreys BlvdMemphis, TN 38120-2177 · (901) 226-4003 · Fax (901) 227-8591
Phone(662) 720-5000
Sole ProprietorYes
Medical School CMSUniversity Of Tennessee, Hsc, College Of MedicineGraduated 2021
Enumeration DateApril 8, 2021
Last NPPES UpdateSeptember 30, 20253 updates tracked since enumeration
NPPES CertifiedSeptember 30, 2025
✔ NPI 1942880646 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in MS · 34904
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
100 HOSPITAL ST, Booneville, MS 38829
Open in Google Maps ↗

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 Magnolia Health 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

Mallie Marie Dennis Md 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 ID8224532353
PECOS Enrollment IDI20250919003605
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.

Hospital Affiliations CMS Care Compare

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

Baptist Memorial Hospital Booneville

Acute Care Hospitals · Booneville, MS
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number250044
Location100 Hospital StreetBooneville, MS 38829 · Prentiss County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 38829 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
$159.18 typical visit price
range $51.65 – $159.18
Typical copayment $39.79 (range $12.91 – $39.79)
Most-billed visit code 99205
Established Patient
$64.96 typical visit price
range $16.15 – $129.61
Typical copayment $16.24 (range $4.03 – $32.40)
Most-billed visit code 99213
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.

ANCHOR ANESTHESIA, LLC
Anesthesiology
100 HOSPITAL ST
BOONEVILLE, MS 38829
Prentiss County (662) 720-5000
NATHAN W BALDWIN MD PA
Internal Medicine
100 HOSPITAL ST, SUITE 100
BOONEVILLE, MS 38829
Prentiss County (662) 820-1600
BAPTIST MEMORIAL HOSPITAL-BOONEVILLE, INC.
Medicare Defined Swing Bed Unit
100 HOSPITAL ST
BOONEVILLE, MS 38829
Prentiss County (662) 720-5004
MRS. LAUREN HALL SPARKS CFNP
Nurse Practitioner (Family)
100 HOSPITAL ST, SUITE 200
BOONEVILLE, MS 38829
Prentiss County (662) 720-3000
WILLIAM J BELL JR. MD
Family Medicine
100 HOSPITAL ST
BOONEVILLE, MS 38829
Prentiss County (800) 291-4020
BRANDON JOHNSON BOONEVILLE ANESTHESIA SERVICES
Contractor
100 HOSPITAL ST
BOONEVILLE, MS 38829
Prentiss County (469) 235-5588
NATHAN WARD BALDWIN MD
Internal Medicine
100 HOSPITAL ST, SUITE 100
BOONEVILLE, MS 38829
Prentiss County (662) 720-1600
UNITED EMERGENCY SERVICES, INC.
Emergency Medicine
100 HOSPITAL ST
BOONEVILLE, MS 38829
Prentiss County (662) 720-5000

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 Mallie Dennis's NPI number?

The NPI number for Mallie Dennis is 1942880646. It was assigned to this individual provider in the NPPES registry on April 8, 2021.

Where is Mallie Dennis located?

Mallie Dennis practices at 100 Hospital St, Booneville, MS 38829. The listed phone number is (662) 720-5000.

What is Mallie Dennis's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Mallie Dennis enrolled in Medicare?

Yes. Mallie Dennis 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 Mallie Dennis accept?

Health plans from Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health, Ambetter from Magnolia Health, Ambetter of Alabama and Ambetter of North Carolina and 2 other insurers list Mallie Dennis 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 Mallie Dennis affiliated with any hospitals?

According to CMS data, Mallie Dennis is affiliated with Baptist Memorial Hospital Booneville.

When was this NPI record last updated?

The NPPES record for Mallie Dennis was last updated on September 30, 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.