John Mark Chestnut, M.D.
Emergency Medicine Physician · Birmingham, AL
John Mark Chestnut, M.D. is an emergency medicine physician with a practice address in Birmingham, Alabama, and NPI 1497044499, issued on Mar 31, 2011. Check the license on the Alabama Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Mark Chestnut
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 71326 GA
Self-reported in NPPES; status is on the state search - Practice location
- 619 19TH St S, Birmingham, AL 35249
- Phone
- (205) 934-3640
- Enumerated
- Mar 31, 2011
- Record last updated
- Jul 3, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 678 in Alabama → Look up another NPI →
Also registered at 619 19TH St S
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Mark Chestnut in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersAlabama Board of Medical ExaminersCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% more Medicare Part D claims than the average emergency medicine physician in 2024
313 Medicare Part D claims for 214 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 70 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen46 claims
- Cefdinir26 claims
- Cephalexin24 claims
- Ondansetron Hcl24 claims
- Oxycodone-Acetaminophen21 claims
- Ondansetron Odt18 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 practice group's MIPS final score for 2023 (Medicare payment program): 81 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $18.07
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 12,335 providers of this specialty with any payment received $953.79 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.
John Mark Chestnut among 678 emergency medicine physician records in Alabama
John Mark Chestnut, M.D. is one of 678 emergency 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 2011, is newer than 59% of them.
- NPI issued2011 · 59% of these records are older, 38% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2019 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Alabama practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
238 emergency medicine physician records list a practice address in Birmingham
They are 238 of the 15,795 NPPES records with a practice address in Birmingham, and 678 emergency medicine physician records in Alabama.
All 678 in Alabama → Every provider in Birmingham → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Kevin Barlotta, MDBirmingham, AL 352491508872235
- Kathleen Bowen, MDBirmingham, AL 352491952382202
- Robert Buckingham, MDBirmingham, AL 352491558342824
- Michael Catenacci, MDBirmingham, AL 352491326000639
- Andrew Edwards, MDBirmingham, AL 352491578545802
- William Fialkowski, MDBirmingham, AL 352491619962347
- James Galbraith, MDBirmingham, AL 352491164508214
- Willie Gilford, MDBirmingham, AL 352491578545810
Common questions
What is John Mark Chestnut, M.D.'s NPI number?
John Mark Chestnut, M.D.'s National Provider Identifier (NPI) is 1497044499, issued on Mar 31, 2011. An NPI identifies a provider in billing; it is not a license.
Where is John Mark Chestnut, M.D. located?
The NPPES record lists a practice address at 619 19TH St S, Birmingham, AL, 35249. Phone: (205) 934-3640. Providers update this record themselves, so call before visiting.
How can I verify John Mark Chestnut, M.D.'s license?
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 John Mark Chestnut, M.D. prescribe under Medicare Part D?
In 2024, John Mark Chestnut, M.D. had 313 Medicare Part D claims for 214 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is John Mark Chestnut, M.D.'s MIPS final score?
The 2023 MIPS final score is 81 of 100, reported for the practice group. 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.