INTERNAL MEDICINE CLINIC, PLLC
NPI 1932248853
Internal Medicine in Meridian, MS
About Internal Medicine Clinic, Pllc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
INTERNAL MEDICINE CLINIC, PLLC (NPI 1932248853) is a healthcare organization registered as an internal medicine in Meridian, Mississippi and active in the NPI registry since February 2007. The organization holds an CLIA Accreditation certificate valid through June 17, 2028 and lists James A Allen, Administrator, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Group Practice 1
Accepted 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)
Internal Medicine Clinic, Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
18Medicare enrollment records show 18 clinicians reassign Medicare billing to Internal Medicine Clinic, PLLC, which bills Medicare for the services they deliver. Of these, 17 practice at this address and 18 within 10 miles. They are listed nearest first.
Clinicians by Medicare Specialty 7
Clinicians, nearest first (18)
Meridian, MS 39301
Meridian, MS 39301
Meridian, MS 39301
Meridian, MS 39301
Meridian, MS 39301
Meridian, MS 39301
Meridian, MS 39301
Meridian, MS 39301
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 Accreditation 25D0671468
Internal Medicine Clinic-Division Of Armc · Meridian, MSFrequently 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 Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr's NPI number?
The NPI number for Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr is 1932248853. It was assigned to this organization in the NPPES registry on February 6, 2007. The provider is doing business as Internal Medicine Clinic, PLLC.
Where is Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr located?
Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr is located at 1600 22nd Ave Medical Towers III, Meridian, MS 39301. The listed phone number is (601) 483-5322.
What is Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr enrolled in Medicare?
Yes. Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr?
According to the CMS Revalidation Reassignment List (October 2026 release), 18 clinicians in 7 Medicare specialties reassign their Medicare billing to Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr. 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), Nephrology (4) and Family Practice (3). Of these, 17 practice at this address and 18 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr hold a CLIA laboratory certificate?
Yes. A Certificate of Accreditation (number 25D0671468) is associated with this NPI, valid through June 17, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
What insurance does Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 2 other insurers list Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr 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 Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr was last updated on December 14, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Internal Medicine Clinic, Pllc · NPI 1932248853
Internal Medicine organization in Meridian, Mississippi. Organization record, active in the CMS NPPES registry since February 6, 2007.
## Identity
- **NPI:** 1932248853 (Entity type: Organization)
- **Enumerated:** February 6, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Legal business name:** Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr
- **Organization subpart:** No
- **Authorized official:** James Allen, ADMINISTRATOR
## Practice location
- **Address:** 1600 22ND AVE, MEDICAL TOWERS III, Meridian, MS 39301-3223
- **Phone:** (601) 483-5322 · **Fax:** (601) 693-8081
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 18 clinicians in 7 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (5), Nephrology (4), Family Practice (3); 17 practice at this address and 18 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 14, 2011
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1932248853) · Data from the CMS NPPES public registry.