Jonathan Jay Masor, M.D.
Internal Medicine Physician · Atlanta, GA
Jonathan Jay Masor, M.D. is an internal medicine physician with a practice address in Atlanta, Georgia, and NPI 1790884328, issued on Sep 21, 2006. Check the license (Georgia 26595, as entered in NPPES) on the Georgia Composite Medical Board; the Medicare figures below come from public CMS files.
- Name
- Jonathan Jay Masor
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 26595 GA
Self-reported in NPPES; status is on the state search - Practice location
- The Emory Clinic, Atlanta, GA 30322
- Phone
- (404) 778-0480
- Enumerated
- Sep 21, 2006
- Record last updated
- Oct 8, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (404) 778-2785
- Medicare enrollment
- Enrolled (PECOS I20101008000174); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,911 in Georgia → Look up another NPI →
Also registered at The Emory Clinic
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hina Aslam, M.D.Neurology Physician1164871588
- Patrick Bowen, M.DEndocrinology, Diabetes & Metabolism Physician1073549994
- David Roberts, MDInternal Medicine Physician1427072693
Verify Jonathan Jay Masor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersGeorgia Composite Medical Board
Search for license 26595Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% more Medicare Part D claims than the average internal medicine physician in 2024
4,999 Medicare Part D claims for 518 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium582 claims
- Amlodipine Besylate338 claims
- Lisinopril303 claims
- Levothyroxine Sodium196 claims
- Metoprolol Succinate178 claims
- Hydrochlorothiazide175 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): 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).
Jonathan Jay Masor among 3,911 internal medicine physician records in Georgia
Jonathan Jay Masor, 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 57% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1983 · 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).
870 internal medicine physician records list a practice address in Atlanta
They are 870 of the 31,476 NPPES records with a practice address in Atlanta, and 3,911 internal medicine physician records in Georgia.
All 3,911 in Georgia → Every provider in Atlanta → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- William Branch, M.D.Atlanta, GA 303221063516581
- Sushma Cribbs, M.D.Atlanta, GA 303221184650491
- Swapan Gaddam, M.D.Atlanta, GA 303221285652115
- Bryce Gartland, M.D.Atlanta, GA 303221790703635
- Thomas Jarrett, M.D.Atlanta, GA 303221962421859
- David Kuhar, MDAtlanta, GA 303221780604561
- William Partin, M.D.Atlanta, GA 303221396853990
- David Propp, M.D.Atlanta, GA 303221982618740
Common questions
What is Jonathan Jay Masor, M.D.'s NPI number?
Jonathan Jay Masor, M.D.'s National Provider Identifier (NPI) is 1790884328, issued on Sep 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Jay Masor, M.D. located?
The NPPES record lists a practice address at The Emory Clinic, Atlanta, GA, 30322. Phone: (404) 778-0480. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Jay Masor, M.D.'s license?
NPPES lists Georgia license number 26595, 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.
How much does Jonathan Jay Masor, M.D. prescribe under Medicare Part D?
In 2024, Jonathan Jay Masor, M.D. had 4,999 Medicare Part D claims for 518 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Jonathan Jay Masor, 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.