INTERNAL MEDICINE SPECIALISTS PLLC
NPI 1740909464
Internal Medicine in Flowood, MS

Active since August 25, 2022CLIA 25D2276911 · Waiver
1040 RIVER OAKS DR STE 201, FLOWOOD, MS 39232(601) 992-1222(601) 992-7222 Get Directions Write a Review

NPPES record last updated: February 13, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 13, 2023, Aug 30, 2022, Aug 25, 2022 (3 updates tracked since 2022).

About Internal Medicine Specialists Pllc NPPES

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

INTERNAL MEDICINE SPECIALISTS PLLC (NPI 1740909464) is a healthcare organization registered as an internal medicine in Flowood, Mississippi and active in the NPI registry since August 2022. The organization holds a CLIA Waiver certificate valid through February 15, 2027 and lists Stephanie Thompson, Office Manager, as its authorized official.

NPPES Registry Identity

NPI1740909464
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameINTERNAL MEDICINE SPECIALISTS PLLC
Location Address1040 RIVER OAKS DR STE 201Flowood, MS 39232-9534
Mailing Address1040 River Oaks Dr Ste 201Flowood, MS 39232-9534 · (601) 992-1222 · Fax (601) 992-7222
Fax(601) 992-7222
Organization SubpartNo
Authorized OfficialStephanie ThompsonOffice Manager · (601) 992-1222
Enumeration DateAugust 25, 2022
Last NPPES UpdateFebruary 13, 20233 updates tracked since enumeration
NPPES CertifiedFebruary 13, 2023
✔ NPI 1740909464 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1040 RIVER OAKS DR STE 201, Flowood, MS 39232

Other Names 2

Doing Business AsInternal Medicine Specialists Pllc
Other NameInternal Medicine Specialist Pllc

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Internal Medicine Specialists Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

5

Medicare enrollment records show 5 clinicians reassign Medicare billing to Internal Medicine Specialists PLLC, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 3 within 10 miles. They are listed nearest first.

Clinicians, nearest first (5)

Internal Medicine
NPI 1134280407
1040 RIVER OAKS DR STE 201
Flowood, MS 39232
(601) 992-1222
✔ PECOS✔ Accepts MedicareSame address
Internal Medicine
NPI 1992803779
1040 RIVER OAKS DR STE 201
Flowood, MS 39232
(601) 992-1222
✔ PECOS✔ Accepts MedicareSame address
Internal Medicine
NPI 1184672750
971 LAKELAND DR STE 250
Jackson, MS 39216
(601) 200-4860
✔ PECOS✔ Accepts Medicare3.5 mi
Emergency Medicine
NPI 1043334568
1842 SIMPSON HIGHWAY 149
Mendenhall, MS 39114
(601) 847-2221
✔ PECOS28 mi
Nurse Practitioner
NPI 1922653849
427 HIGHWAY 51 N
Brookhaven, MS 39601
(601) 833-6011
✔ PECOS56 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 25D2276911

Internal Medicine Specialists · Flowood, MS
Active · expires Feb 15, 2027
CLIA Number25D2276911
Laboratory TypePhysician Office
Certificate Effective DateFebruary 16, 2025
Certificate Expiration DateFebruary 15, 2027
Laboratory DirectorDr. John Biggs
Laboratory Phone(601) 992-1222
Laboratory LocationInternal Medicine Specialists1040 River Oaks Dr Ste 201, Flowood, MS 39232
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

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 Internal Medicine Specialists PLLC's NPI number?

The NPI number for Internal Medicine Specialists PLLC is 1740909464. It was assigned to this organization in the NPPES registry on August 25, 2022. The provider is also known as Internal Medicine Specialist PLLC.

Where is Internal Medicine Specialists PLLC located?

Internal Medicine Specialists PLLC is located at 1040 River Oaks Dr Ste 201, Flowood, MS 39232. The listed phone number is (601) 992-1222.

What is Internal Medicine Specialists PLLC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Internal Medicine Specialists PLLC enrolled in Medicare?

Yes. Internal Medicine Specialists PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Internal Medicine Specialists PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians in 3 Medicare specialties reassign their Medicare billing to Internal Medicine Specialists PLLC. A 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 the clinician's services. The largest specialties are Internal Medicine (3), Emergency Medicine (1) and Nurse Practitioner (1). Of these, 2 practice at this address and 3 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Internal Medicine Specialists PLLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 25D2276911) is associated with this NPI, valid through February 15, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Internal Medicine Specialists PLLC was last updated on February 13, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.