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J. MICHAEL KARST M.D., P.A.
NPI 1750436895
Internal Medicine in Montgomery, AL

Active since January 25, 2007CLIA 01D0304240 · Certificate of Compliance
4485 ATLANTA HWY, MONTGOMERY, AL 36109(334) 272-4302(334) 272-0195 Get Directions Write a Review

NPPES record last updated: March 8, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About J. Michael Karst M.d., P.a. NPPES

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

J. MICHAEL KARST M.D., P.A. (NPI 1750436895) is a healthcare organization registered as an internal medicine in Montgomery, Alabama and active in the NPI registry since January 2007. The organization holds a CLIA Certificate of Compliance certificate valid through May 24, 2027 and lists Ann Karst, Office Manager, as its authorized official.

NPPES Registry Identity

NPI1750436895
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameJ. MICHAEL KARST M.D., P.A.
Location Address4485 ATLANTA HWYMontgomery, AL 36109-3102
Mailing Address4485 Atlanta HwyMontgomery, AL 36109-3102 · (334) 272-4302 · Fax (334) 272-0195
Phone(334) 272-4302
Fax(334) 272-0195
Organization SubpartNo
Authorized OfficialAnn KarstOffice Manager · (334) 272-4302
Enumeration DateJanuary 25, 2007
Last NPPES UpdateMarch 8, 2024
NPPES CertifiedMarch 8, 2024
✔ NPI 1750436895 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in AL · 13546
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.
4485 ATLANTA HWY, Montgomery, AL 36109
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Other Identifiers 1

Other200006016Travelers Medicare

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)

J. Michael Karst M.d., P.a. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to J. Michael Karst M.D., P.A., which bills Medicare for the services this clinician delivers.

Clinician (1)

J Karst, M.D.
Internal Medicine
NPI 1194759662
4485 ATLANTA HWY
Montgomery, AL 36109
(334) 272-4302
✔ PECOS✔ Accepts MedicareSame address

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 Compliance 01D0304240

J Michael Karst MD PA · Montgomery, AL
Active · expires May 24, 2027
CLIA Number01D0304240
Laboratory TypePhysician Office
Certificate Effective DateMay 25, 2025
Certificate Expiration DateMay 24, 2027
Laboratory DirectorJ Michael Karst
Laboratory Phone(334) 272-4302
Laboratory LocationJ Michael Karst MD PA4485 Atlanta Highway, Montgomery, AL 36109
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

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 J. Michael Karst M.D., P.A.'s NPI number?

The NPI number for J. Michael Karst M.D., P.A. is 1750436895. It was assigned to this organization in the NPPES registry on January 25, 2007.

Where is J. Michael Karst M.D., P.A. located?

J. Michael Karst M.D., P.A. is located at 4485 Atlanta Hwy, Montgomery, AL 36109. The listed phone number is (334) 272-4302.

What is J. Michael Karst M.D., P.A.'s specialty?

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

Is J. Michael Karst M.D., P.A. enrolled in Medicare?

Yes. J. Michael Karst M.D., P.A. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through J. Michael Karst M.D., P.A.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to J. Michael Karst M.D., P.A.. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does J. Michael Karst M.D., P.A. hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 01D0304240) is associated with this NPI, valid through May 24, 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 J. Michael Karst M.D., P.A. was last updated on March 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.