Gregory B. Knowlton, M.D.
Nephrology Physician · Atlanta, GA
Gregory B. Knowlton, M.D. is a nephrology physician with a practice address in Atlanta, Georgia, and NPI 1366522690, issued on Oct 17, 2006. Check the license (Georgia 018037, as entered in NPPES) on the Georgia Composite Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory B. Knowlton
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 018037 GA
Self-reported in NPPES; status is on the state search - Practice location
- 5671 Peachtree Dunwoody RD NE, Atlanta, GA 30342
- Phone
- (404) 855-7030
- Enumerated
- Oct 17, 2006
- Record last updated
- Jan 7, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (678) 843-6619
- Medicaid ID
- 00143943A GA
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 417 in Georgia → Look up another NPI →
Also registered at 5671 Peachtree Dunwoody RD NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Peter Bennie, PAPhysician Assistant1164498903
- Richard Bernstein, M.D.Specialist1619978897
- David Brandenburg, MDGastroenterology Physician1821088790
- Jennifer Bridges, AT-CAthletic Trainer1063474062
- Krystal Chambers, M.D.Physical Medicine & Rehabilitation Physician1487649174
- Joseph Chandler, M.D.Orthopaedic Surgery Physician1972599306
Verify Gregory B. Knowlton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersGeorgia Composite Medical Board
Search for license 018037Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average nephrology physician in 2024
29 Medicare Part D claims, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Gregory B. Knowlton among 417 nephrology physician records in Georgia
Gregory B. Knowlton, M.D. is one of 417 nephrology physician records with a practice address in Georgia. 91% 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 16% of them.
- NPI issued2006 · 16% of these records are older, 47% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileNo · 82% of these records are
- Record last updated2016 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Georgia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Georgia
There are 417 nephrology physician records in Georgia.
All 417 in Georgia → Every provider in Atlanta → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Shailesh Basani, MDAtlanta, GA 303421629269972
- Daniel Cohen, M.D.Atlanta, GA 303421790866028
- Byard Edwards, M.D.Atlanta, GA 303421689684516
- Anupama Gowda, M.D.Atlanta, GA 303421508947870
- Cory HandelsmanAtlanta, GA 303421437458924
- Susan Hill, M.D.Atlanta, GA 303421578643805
- Chandrashekar KashyapAtlanta, GA 303421699022426
- Srijita Kumar, M.D.Atlanta, GA 303421437449741
Common questions
What is Gregory B. Knowlton, M.D.'s NPI number?
Gregory B. Knowlton, M.D.'s National Provider Identifier (NPI) is 1366522690, issued on Oct 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory B. Knowlton, M.D. located?
The NPPES record lists a practice address at 5671 Peachtree Dunwoody RD NE, Atlanta, GA, 30342. Phone: (404) 855-7030. Providers update this record themselves, so call before visiting.
How can I verify Gregory B. Knowlton, M.D.'s license?
NPPES lists Georgia license number 018037, 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 Gregory B. Knowlton, M.D. prescribe under Medicare Part D?
In 2024, Gregory B. Knowlton, M.D. had 29 Medicare Part D claims; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
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.