Mary John Ninan, M.D
Hematology & Oncology Physician · Johns Creek, GA
Mary John Ninan, M.D is a hematology & oncology physician with a practice address in Johns Creek, Georgia, and NPI 1356533145, issued on Aug 15, 2007. Check the license (Georgia 058551, as entered in NPPES) on the Georgia Composite Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mary John Ninan
- Credential
- M.D
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- 058551 GA
43128 TX
N7955 TX
Self-reported in NPPES; status is on the state search - Practice location
- 6300 Hospital Pkwy Ste 300, Johns Creek, GA 30097
- Phone
- (770) 623-8965
- Enumerated
- Aug 15, 2007
- Record last updated
- Aug 20, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (770) 623-4018
- Medicaid IDs
- 003158193C GA
003158193D GA - Medicare enrollment
- Enrolled (PECOS I20150209001303); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 396 in Georgia → Look up another NPI →
Also registered at 6300 Hospital Pkwy Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bridgitte Jackson, FNP, AOCNFamily Nurse Practitioner1770643876
- Danah McPherson, FNP-BCFamily Nurse Practitioner1942070743
- Dorinda Nelson, AGPCNPNurse Practitioner1487535548
- Canelda Perry, FNP-CNurse Practitioner1750846069
- Karthi Subbannan, M.DHematology & Oncology Physician1154443091
Verify Mary John Ninan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersGeorgia Composite Medical Board
Search for license 058551Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
532 Medicare Part D claims for 88 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 33% of claims. 22 claims were for opioids.
Most prescribed
- Eliquis51 claims
- Revlimid49 claims
- Hydroxyurea31 claims
- Dexamethasone30 claims
- Anastrozole29 claims
- Ondansetron Odt28 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): 68.4 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: $1,254.95
48 payments; by number, the most common kind was food and beverage; the largest payer was Daiichi Sankyo Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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.
Bills Medicare through one group practice
- Nsh Cancer Institute Professional Services G LLCDuluth, GA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary John Ninan among 396 hematology & oncology physician records in Georgia
Mary John Ninan, M.D is one of 396 hematology & oncology physician records with a practice address in Georgia. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 51% of them.
- NPI issued2007 · 51% of these records are older, 39% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1999 · median 2002 among the 300 with a school on file
- Record last updated2020 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Georgia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Georgia
There are 396 hematology & oncology physician records in Georgia.
All 396 in Georgia → Every provider in Johns Creek → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Cengiz Inal, MDJohns Creek, GA 300971598907891
- Mohan Krishnamachary, MDJohns Creek, GA 300971588625099
- Karthi Subbannan, M.DJohns Creek, GA 300971154443091
- Stephen Szabo, MDJohns Creek, GA 300971780662361
- Hannah JarnaginDuluth, GA 300961518615376
- Venkata Pokuri, MDDuluth, GA 300961992017362
- Richard Carter, MDConyers, GA 300941083660104
- Megan McKee, M.D.Conyers, GA 300941114161411
Common questions
What is Mary John Ninan, M.D's NPI number?
Mary John Ninan, M.D's National Provider Identifier (NPI) is 1356533145, issued on Aug 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mary John Ninan, M.D located?
The NPPES record lists a practice address at 6300 Hospital Pkwy Ste 300, Johns Creek, GA, 30097. Phone: (770) 623-8965. Providers update this record themselves, so call before visiting.
How can I verify Mary John Ninan, M.D's license?
NPPES lists Georgia license number 058551, 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 Mary John Ninan, M.D prescribe under Medicare Part D?
In 2024, Mary John Ninan, M.D had 532 Medicare Part D claims for 88 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Mary John Ninan, M.D's MIPS final score?
The 2023 MIPS final score is 68.4 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.