Karthi Subbannan, M.D
Hematology & Oncology Physician · Johns Creek, GA
Karthi Subbannan, M.D is a hematology & oncology physician with a practice address in Johns Creek, Georgia, and NPI 1154443091, issued on Apr 4, 2007. Check the license (Georgia 062169, as entered in NPPES) on the Georgia Composite Medical Board; the Medicare figures below come from public CMS files.
- Name
- Karthi Subbannan
- Credential
- M.D
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 062169 GA
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
- Apr 4, 2007
- Record last updated
- Aug 19, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (770) 623-4018
- Medicaid IDs
- 738700884C GA
738700884D GA - Medicare enrollment
- Enrolled (PECOS I20090407000541); accepts Medicare assignment
- 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
- Mary Ninan, M.DHematology & Oncology Physician1356533145
- Canelda Perry, FNP-CNurse Practitioner1750846069
Verify Karthi Subbannan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersGeorgia Composite Medical Board
Search for license 062169Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% more Medicare Part D claims than the average hematology & oncology physician in 2024
917 Medicare Part D claims for 146 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of claims. 84 claims were for opioids.
Most prescribed
- Eliquis160 claims
- Anastrozole59 claims
- Hydroxyurea52 claims
- Gabapentin40 claims
- Xarelto40 claims
- Escitalopram Oxalate38 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: $1,480.84
65 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer 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).
Karthi Subbannan among 396 hematology & oncology physician records in Georgia
Karthi Subbannan, 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
- Graduated1996 · 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
- Mary Ninan, M.DJohns Creek, GA 300971356533145
- 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 Karthi Subbannan, M.D's NPI number?
Karthi Subbannan, M.D's National Provider Identifier (NPI) is 1154443091, issued on Apr 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Karthi Subbannan, 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 Karthi Subbannan, M.D's license?
NPPES lists Georgia license number 062169, 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 Karthi Subbannan, M.D prescribe under Medicare Part D?
In 2024, Karthi Subbannan, M.D had 917 Medicare Part D claims for 146 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Karthi Subbannan, 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.