John Leatherbury Allen, M.D.
Internal Medicine Physician · Brookhaven, GA
John Leatherbury Allen, M.D. is an internal medicine physician with a practice address in Brookhaven, Georgia, and NPI 1639495492, issued on Apr 19, 2010. Check the license (Georgia 74229, as entered in NPPES) on the Georgia Composite Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Leatherbury Allen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 74229 GA
RESIDENT4405 GA
Self-reported in NPPES; status is on the state search - Practice location
- 3853 Byrnwyck PL NE, Brookhaven, GA 30319
- Phone
- (251) 533-8739
- Enumerated
- Apr 19, 2010
- Record last updated
- Oct 6, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160824001726); accepts Medicare assignment
- Medical or professional school
- University Of Alabama School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,911 in Georgia → Look up another NPI →
Verify John Leatherbury Allen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersGeorgia Composite Medical Board
Search for license 74229Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 92.3 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).
Bills Medicare through one group practice
- The Emory Clinic IncAtlanta, GA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Leatherbury Allen among 3,911 internal medicine physician records in Georgia
John Leatherbury Allen, M.D. is one of 3,911 internal medicine physician records with a practice address in Georgia. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 58% of them.
- NPI issued2010 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2010 · median 2005 among the 2,535 with a school on file
- Record last updated2015 · 51% 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 Georgia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 internal medicine physician records list a practice address in Brookhaven
They are 6 of the 647 NPPES records with a practice address in Brookhaven, and 3,911 internal medicine physician records in Georgia.
All 3,911 in Georgia → Every provider in Brookhaven → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- William AlexanderBrookhaven, GA 303191578079513
- Yamini Alla, MDBrookhaven, GA 303191689152738
- Yohannes Belachew, M.DAtlanta, GA 303191871586693
- Helen Gidey, M.D.Atlanta, GA 303191770501611
- David Scurlock, MDAtlanta, GA 303191255430328
- Carolyn Sigman, MDBrookhaven, GA 303191184762585
- Brandon Smith, MDBrookhaven, GA 303191619598505
- Jodi Vann, MDAtlanta, GA 303191154496693
Common questions
What is John Leatherbury Allen, M.D.'s NPI number?
John Leatherbury Allen, M.D.'s National Provider Identifier (NPI) is 1639495492, issued on Apr 19, 2010. An NPI identifies a provider in billing; it is not a license.
Where is John Leatherbury Allen, M.D. located?
The NPPES record lists a practice address at 3853 Byrnwyck PL NE, Brookhaven, GA, 30319. Phone: (251) 533-8739. Providers update this record themselves, so call before visiting.
How can I verify John Leatherbury Allen, M.D.'s license?
NPPES lists Georgia license number 74229, as entered by the provider. Search the Georgia Composite Medical Board at https://medicalboard.georgia.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is John Leatherbury Allen, M.D.'s MIPS final score?
The 2023 MIPS final score is 92.3 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.