Am J Hematol
AnticoagulantsBlood Coagulation DisordersFactor V
Dr. Thandavababu Chelliah, MD
NPI1730100744PAC ID5294730156
- Medicare services, 2024
- 134
- Medicare patients, 2024
- 76
- Part D claims, 2024
- 399
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 2601 Ocean Parkway, Brooklyn, NY 11235
- Practice phone
- Call (718) 616-4834
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Chelliah's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Thandavababu Chelliah is a hematologist and oncologist in Brooklyn, New York
Dr. Chelliah practices at NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital in Brooklyn, New York, part of NYC.
Dr. Chelliah's NPI, 1730100744, was assigned on July 22, 2006. Dr. Chelliah holds New York license 238914.
NPI and contact details
- NPI
- 1730100744NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5294730156
- NPI enumeration date
- July 22, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (718) 616-4834
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thandavababu Chelliah practices at NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital in Brooklyn, New York
Dr. Chelliah's primary practice is NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital, at 2601 Ocean Parkway, Brooklyn, NY 11235 in Kings County. The practice phone is (718) 616-4834.
- NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital2601 Ocean Parkway, Brooklyn, NY 11235 · Kings CountyPhone(718) 616-4834
Source: Dmand AI Affiliation Data
Dr. Thandavababu Chelliah is affiliated with 1 site of care and 2 medical groups
Dr. Chelliah's primary practice is NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital in Brooklyn, New York, part of NYC. The medical group on file is Physician Affiliate Group of New York (PAGNY). Dmand AI also links Dr. Chelliah to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thandavababu Chelliah's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chelliah practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thandavababu Chelliah is one of 996 hematologists and oncologists in New York
Hematology and oncology is Dr. Chelliah's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Chelliah is licensed in New York.
Specialties and state licenses
- Hematology and oncology, New YorkPrimary
Hematologists and oncologists near Dr. Chelliah
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
996hematologists and oncologists in New York67hematologists and oncologists in Brooklyn2hematologists and oncologists at NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thandavababu Chelliah billed Medicare for 134 services in 2024
CMS data shows 134 Medicare services from Dr. Chelliah across 3 procedure codes in 2024, for 76 Medicare patients. Medicare paid $10,695 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024134
Medicare patients76
Paid by Medicare$10,695
Procedure codes3
Dr. Chelliah's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1462024: 1348%
Dr. Chelliah compared with the New York median for hematologists and oncologists, 2024
- Dr. Chelliah
- New York median
- Medicare services
- 134vs 66880% below
- Medicare patients
- 76vs 21064% below
- Part D claims
- 172vs 25833% below
Medians across 940 hematologists and oncologists in New York with Dmand AI profiles that report each measure.
Dr. Chelliah's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chelliah and other hematologists and oncologists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thandavababu Chelliah treated 76 Medicare patients in 2024, average age 78
CMS counts 76 Medicare patients who saw Dr. Chelliah in 2024. The largest group is 75 to 84, with 31 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 75% are also on Medicaid. Their average risk score is 2.46, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chelliah's median patient age at 75, with 50% women.
Medicare patients, 202476
Average age78
Average risk score2.46
Also on Medicaid75%
Dr. Chelliah's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chelliah's Medicare patients by sex, 2024
- Women4255%
- Men3445%
Chronic conditions among Dr. Chelliah's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes68%
- Arthritis63%
- Ischemic heart disease53%
- Cancer50%
- Chronic kidney disease41%
- Mood disorders38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chelliah's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thandavababu Chelliah wrote 399 Medicare Part D claims in 2024
In 2024, Dr. Chelliah wrote 399 Medicare Part D claims for 52 patients. 59% of them were for generic drugs. CMS names the drug for 172 of them, across 11 drugs with 11 or more claims each, at $597,792 in total drug cost. In 2023, CMS named 137 claims across 9 drugs.
Part D claims, 2024399
Drugs named by CMS11
Total drug cost$597,792
Part D patients52
Dr. Chelliah's Part D claims by kind of drug, 2024
- Generic235 claims59%
- Brand-name and other164 claims41%
Dr. Chelliah's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Chelliah's Part D claims, 2024
- Opioids5%18 of 399 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1372024: 17226%
Drugs named by CMS: 11 in 2024, 9 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Thandavababu Chelliah takes part in Medicare
Dr. Chelliah accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Thandavababu Chelliah has 1 publication on record
Dmand AI links 1 paper to Dr. Chelliah in 2011. Dr. Chelliah's most frequent co-authors are Louis M. Aledort, MD and Jay Steven Lipshitz, MD.
Papers1
Dr. Chelliah's most frequent co-authors
- Louis M. Aledort, MD1 shared paper
- Jay Steven Lipshitz, MD1 shared paper
Recent publications by Dr. Chelliah
See who Dr. Chelliah researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chelliah works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Thandavababu Chelliah received $1,271 in industry payments from 2016 to 2025
CMS Open Payments shows 52 general payments to Dr. Chelliah from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 85% of the total. Pfizer Inc. paid the most, $304.
General payments to Dr. Chelliah by program year, 2016 to 2025
General payments to Dr. Chelliah by kind, 2016 to 2025
$1.3Kin total
- Food and beverage$1,08085%
- Education$19115%
Companies that paid Dr. Chelliah the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Thandavababu Chelliah's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Thandavababu Chelliah
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Thandavababu Chelliah's NPI number?
Dr. Thandavababu Chelliah's NPI number is 1730100744. It was assigned on July 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thandavababu Chelliah?
Dr. Thandavababu Chelliah is a hematologist and oncologist in Brooklyn, New York. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Thandavababu Chelliah practice?
Dr. Chelliah practices at 2601 Ocean Parkway, Brooklyn, NY 11235. Dr. Chelliah's primary practice is NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital in Brooklyn, New York, part of NYC. Dmand AI also links Dr. Chelliah to 1 medical group.
What is Dr. Thandavababu Chelliah's office phone number?
The practice phone on file for Dr. Chelliah is (718) 616-4834.
What is Dr. Thandavababu Chelliah's medical license number?
Dr. Chelliah holds New York license 238914.
Which hospitals is Dr. Thandavababu Chelliah affiliated with?
Dr. Chelliah practices at NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital in Brooklyn, New York.
What medical group is Dr. Thandavababu Chelliah part of?
Dr. Chelliah is linked to Physician Affiliate Group of New York (PAGNY). Dmand AI links Dr. Chelliah to 1 more medical group.
Does Dr. Thandavababu Chelliah accept Medicare?
Yes. CMS data shows Dr. Chelliah billed Medicare for 134 services in 2024, and Dr. Chelliah accepts Medicare assignment.
How many Medicare patients does Dr. Thandavababu Chelliah see?
CMS counts 76 Medicare patients who saw Dr. Chelliah in 2024, with an average age of 78.
What services does Dr. Thandavababu Chelliah bill to Medicare?
In 2024, Dr. Chelliah's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and hospital inpatient care (99222).
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What drugs does Dr. Thandavababu Chelliah prescribe most?
In 2024 Medicare Part D data, Dr. Chelliah's most prescribed drugs by claims were Anastrozole, Lupron Depot and Prednisone.
Has Dr. Thandavababu Chelliah received payments from drug or device companies?
CMS Open Payments shows $1,271 in general payments to Dr. Chelliah from 15 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Thandavababu Chelliah been practicing?
Dr. Chelliah graduated from medical school in 1993, 33 years ago.
Does Dr. Thandavababu Chelliah do research?
Dmand AI links 1 publication to Dr. Chelliah.
Who does Dr. Thandavababu Chelliah publish with?
Dr. Chelliah's most frequent co-authors are Louis M. Aledort, MD (1 shared paper) and Jay Steven Lipshitz, MD (1 shared paper).
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