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SOUTHERN INTERNAL MEDICINE PLLC
NPI 1912188624
Internal Medicine in Lake City, FL

Active since November 21, 2007CLIA 10D1082519 · Waiver
404 NW HALL OF FAME DR, LAKE CITY, FL 32055(386) 754-2433(386) 754-2586 Get Directions Write a Review

NPPES record last updated: November 21, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Southern Internal Medicine Pllc NPPES

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

SOUTHERN INTERNAL MEDICINE PLLC (NPI 1912188624) is a healthcare organization registered as an internal medicine in Lake City, Florida and active in the NPI registry since November 2007. The organization holds a CLIA Waiver certificate valid through September 25, 2027 and lists Guy S Strauss, Manager, as its authorized official.

NPPES Registry Identity

NPI1912188624
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameSOUTHERN INTERNAL MEDICINE PLLC
Location Address404 NW HALL OF FAME DRLake City, FL 32055-4833
Mailing Address7896 Briarwood CirGlen Saint Mary, FL 32040-4706 · (904) 521-5388 · Fax (904) 259-7845
Phone(386) 754-2433
Fax(386) 754-2586
Organization SubpartNo
Authorized OfficialGuy S StraussManager · (904) 521-5388
Enumeration DateNovember 21, 2007
✔ NPI 1912188624 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in FL · OS4706
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.
404 NW HALL OF FAME DR, Lake City, FL 32055
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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

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AvMed.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

Clinicians Billing Medicare Through This Organization

6

Medicare enrollment records show 6 clinicians reassign Medicare billing to Southern Internal Medicine PLLC, which bills Medicare for the services they deliver. Of these, 4 practice at this address and 5 within 10 miles. They are listed nearest first.

Clinicians, nearest first (6)

Guy Strauss, D.O.
Internal Medicine
NPI 1578570727
404 NW HALL OF FAME DR
Lake City, FL 32055
(386) 719-2540
✔ PECOS✔ Accepts MedicareSame address
Elaina Williamson, ARNP
Nurse Practitioner
NPI 1053851451
404 NW HALL OF FAME DR
Lake City, FL 32055
(386) 719-2540
✔ PECOSSame address
Brittaney Howell, APRN
Nurse Practitioner
NPI 1316661929
404 NW HALL OF FAME DR
Lake City, FL 32055
(386) 719-2540
✔ PECOS✔ Accepts MedicareSame address
Samantha Smythe, APRN
Nurse Practitioner
NPI 1902466881
404 NW HALL OF FAME DR
Lake City, FL 32055
(386) 719-2540
✔ PECOS✔ Accepts MedicareSame address
Stefanie Jackson, ARNP
Nurse Practitioner
NPI 1346204427
1289 SW STATE ROAD 47
Lake City, FL 32025
(386) 755-0421
✔ PECOS✔ Accepts Medicare3.6 mi
Bryce Catarelli, ARNP
Nurse Practitioner
NPI 1437553161
1600 SW ARCHER RD
Gainesville, FL 32610
(352) 392-1161
✔ PECOS43 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 10D1082519

Southern Internal Medicine PLLC · Lake City, FL
Active · expires Sep 25, 2027
CLIA Number10D1082519
Laboratory TypePhysician Office
Certificate Effective DateSeptember 26, 2025
Certificate Expiration DateSeptember 25, 2027
Laboratory DirectorGuy S. Strauss
Laboratory Phone(386) 719-2540
Laboratory LocationSouthern Internal Medicine PLLC404 NW Hall Of Fame Drive, Lake City, FL 32055
CLIA data matches this NPI record on: Address Name
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 Southern Internal Medicine PLLC's NPI number?

The NPI number for Southern Internal Medicine PLLC is 1912188624. It was assigned to this organization in the NPPES registry on November 21, 2007.

Where is Southern Internal Medicine PLLC located?

Southern Internal Medicine PLLC is located at 404 NW Hall Of Fame Dr, Lake City, FL 32055. The listed phone number is (386) 754-2433.

What is Southern Internal Medicine PLLC's specialty?

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

Is Southern Internal Medicine PLLC enrolled in Medicare?

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

How many clinicians bill Medicare through Southern Internal Medicine PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 6 clinicians in 2 Medicare specialties reassign their Medicare billing to Southern Internal Medicine 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 Nurse Practitioner (5) and Internal Medicine (1). Of these, 4 practice at this address and 5 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Southern Internal Medicine PLLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 10D1082519) is associated with this NPI, valid through September 25, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Southern Internal Medicine PLLC accept?

Health plans from AvMed list Southern Internal Medicine PLLC 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 Southern Internal Medicine PLLC was last updated on November 21, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.