J Michael Karst, M.D.
Internal Medicine Physician · Montgomery, AL
J Michael Karst, M.D. is an internal medicine physician with a practice address in Montgomery, Alabama, and NPI 1194759662, issued on Jul 10, 2006. Check the license (Alabama 13546, as entered in NPPES) on the Alabama Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- J Michael Karst
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 13546 AL
Self-reported in NPPES; status is on the state search - Practice location
- 4485 Atlanta Hwy, Montgomery, AL 36109
- Phone
- (334) 272-4302
- Enumerated
- Jul 10, 2006
- Record last updated
- Mar 8, 2024
- Fax
- (334) 272-0195
- Medicaid ID
- 529001630 AL
- Medicare enrollment
- Enrolled (PECOS I20100622000391); accepts Medicare assignment
- Medical or professional school
- University Of Alabama School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,705 in Alabama → Look up another NPI →
Verify J Michael Karst in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersAlabama Board of Medical Examiners
Search for license 13546Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.7 times the Medicare Part D claims of the average internal medicine physician in 2024
14,920 Medicare Part D claims for 833 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 274 claims were for opioids.
Most prescribed
- Atorvastatin Calcium769 claims
- Amlodipine Besylate716 claims
- Alprazolam495 claims
- Levothyroxine Sodium431 claims
- Pantoprazole Sodium395 claims
- Losartan Potassium333 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 89.7 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $14.31
1 payment: food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
J Michael Karst among 1,705 internal medicine physician records in Alabama
J Michael Karst, M.D. is one of 1,705 internal medicine physician records with a practice address in Alabama. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 49% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1986 · median 2003 among the 1,136 with a school on file
- Record last updated2024 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Alabama practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
105 internal medicine physician records list a practice address in Montgomery
They are 105 of the 3,661 NPPES records with a practice address in Montgomery, and 1,705 internal medicine physician records in Alabama.
All 1,705 in Alabama → Every provider in Montgomery → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Felix Allen, MDMontgomery, AL 361091558421750
- Jean Darbouze, MDMontgomery, AL 361091558469650
- William Foster, MDMontgomery, AL 361091902907124
- Monjurul Islam, M.D.Montgomery, AL 361091023192796
- Hari Kapur, M.DMontgomery, AL 361091750370482
- Sylvia McQueen, MDMontgomery, AL 361091255477170
- Boniface Okafor, M.D.Montgomery, AL 361091346355757
- Jayesh PatelMontgomery, AL 361091851400626
Common questions
What is J Michael Karst, M.D.'s NPI number?
J Michael Karst, M.D.'s National Provider Identifier (NPI) is 1194759662, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is J Michael Karst, M.D. located?
The NPPES record lists a practice address at 4485 Atlanta Hwy, Montgomery, AL, 36109. Phone: (334) 272-4302. Providers update this record themselves, so call before visiting.
How can I verify J Michael Karst, M.D.'s license?
NPPES lists Alabama license number 13546, as entered by the provider. Search the Alabama Board of Medical Examiners at https://www.albme.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does J Michael Karst, M.D. prescribe under Medicare Part D?
In 2024, J Michael Karst, M.D. had 14,920 Medicare Part D claims for 833 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is J Michael Karst, M.D.'s MIPS final score?
The 2023 MIPS final score is 89.7 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.