Dr. Subramanian Gnanaguruparan, MD
- Medicare services, 2024
- 1,690
- Medicare patients, 2024
- 522
- Part D claims, 2024
- 1,111
- Publications
- 3
- Hospital affiliations
- 2
- Practice address
- 200 Hygeia Dr, Newark, DE 19713
- Practice phone
- Call (302) 623-7362
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
ChristianaCare Primary Care at Woodstown
Newark, Delaware
Find Dr. Gnanaguruparan'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. Subramanian Gnanaguruparan is a cardiologist in Newark, Delaware
Dr. Gnanaguruparan practices at ChristianaCare Primary Care at Woodstown in Newark, Delaware.
Dr. Gnanaguruparan's NPI, 1396058533, was assigned on July 16, 2010. Dr. Gnanaguruparan holds Delaware license C1-0010444.
- NPI
- 1396058533NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941442248
- NPI enumeration date
- July 16, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (302) 623-7362
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Subramanian Gnanaguruparan practices at ChristianaCare Primary Care at Woodstown in Newark, Delaware
Dr. Gnanaguruparan's primary practice is ChristianaCare Primary Care at Woodstown, at 200 Hygeia Dr, Newark, DE 19713 in New Castle County. The practice phone is (302) 623-7362.
- ChristianaCare Primary Care at Woodstown200 Hygeia Dr, Newark, DE 19713 · New Castle CountyPhone(302) 623-7362
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Subramanian Gnanaguruparan is affiliated with 7 sites of care and 6 medical groups
Dr. Gnanaguruparan's primary practice is ChristianaCare Primary Care at Woodstown in Newark, Delaware. Dr. Gnanaguruparan is also affiliated with Christiana Hospital. The medical group on file is ChristianaCare. Dmand AI also links Dr. Gnanaguruparan to 1 more hospital, 5 medical groups and 4 group practices and clinics, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Subramanian Gnanaguruparan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gnanaguruparan practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ChristianaCare Primary Care at Woodstown | Available with a free account |
| +6 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Subramanian Gnanaguruparan is one of 106 cardiologists in Delaware
Cardiovascular disease is Dr. Gnanaguruparan's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dmand AI has Dr. Gnanaguruparan's licenses on file in 3 states: Delaware, New Jersey and New York.
Specialties and state licenses
- Cardiovascular disease, DelawarePrimary
- Student in an organized health care education/training program, New Jersey
- Internal medicine, New York
Cardiologists near Dr. Gnanaguruparan
Counts of cardiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Subramanian Gnanaguruparan billed Medicare for 1,690 services in 2024
CMS data shows 1,690 Medicare services from Dr. Gnanaguruparan across 22 procedure codes in 2024, for 522 Medicare patients. Medicare paid $110,341 for them.
Dr. Gnanaguruparan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,7312024: 1,17532%
- Tests and treatments
- 2023: 6812024: 39442%
- Drugs given in the office
- 2023: 2382024: 6174%
- Imaging
- 2023: 732024: 3059%
- Other services
- 2023: 722024: 3058%
Where Dr. Gnanaguruparan's Medicare services took place, 2024
- In an office1,06663%
- In a facility62437%
Dr. Gnanaguruparan compared with the Delaware median for cardiologists, 2024
- Dr. Gnanaguruparan
- Delaware median
- Medicare services
- 1,690vs 2,79239% below
- Medicare patients
- 522vs 1,47865% below
- Part D claims
- 979vs 2,33058% below
Medians across 103 cardiologists in Delaware with Dmand AI profiles that report each measure.
Dr. Gnanaguruparan'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Subramanian Gnanaguruparan treated 522 Medicare patients in 2024, average age 75
CMS counts 522 Medicare patients who saw Dr. Gnanaguruparan in 2024. The largest group is 75 to 84, with 197 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.99, 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. Gnanaguruparan's median patient age at 73, with 48% women.
Dr. Gnanaguruparan's Medicare patients by age, 2024
Dr. Gnanaguruparan's Medicare patients by sex, 2024
- Women29256%
- Men23044%
Chronic conditions among Dr. Gnanaguruparan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Ischemic heart disease50%
- Diabetes47%
- Heart failure43%
- Chronic kidney disease40%
- Atrial fibrillation39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gnanaguruparan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women48%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Subramanian Gnanaguruparan wrote 1,111 Medicare Part D claims in 2024
In 2024, Dr. Gnanaguruparan wrote 1,111 Medicare Part D claims for 252 patients. 86% of them were for generic drugs. CMS names the drug for 979 of them, across 23 drugs with 11 or more claims each, at $159,982 in total drug cost. In 2023, CMS named 1,028 claims across 21 drugs.
Dr. Gnanaguruparan's Part D claims by kind of drug, 2024
- Generic950 claims86%
- Brand-name161 claims14%
Dr. Gnanaguruparan'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,0282024: 9795%
Drugs named by CMS: 23 in 2024, 21 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. Subramanian Gnanaguruparan takes part in Medicare
Dr. Gnanaguruparan 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. Subramanian Gnanaguruparan has 3 publications on record
Dmand AI links 3 papers to Dr. Gnanaguruparan, published from 2020 to 2025. Dr. Gnanaguruparan's most frequent co-authors are Karuppiah Arunachalam, MD, Pratik Bharat Rajpopat, MBBS and Ankit Vyas, MD.
Dr. Gnanaguruparan's most frequent co-authors
- Karuppiah Arunachalam, MD1 shared paper
- Pratik Bharat Rajpopat, MBBS1 shared paper
- Ankit Vyas, MD1 shared paper
Recent publications by Dr. Gnanaguruparan
R I Med J (2013)
See who Dr. Gnanaguruparan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gnanaguruparan works with, so you can find a warm path to the right cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Subramanian Gnanaguruparan received $2,221 in industry payments from 2017 to 2025
CMS Open Payments shows 56 general payments to Dr. Gnanaguruparan from 16 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 99% of the total. Janssen Pharmaceuticals, Inc paid the most, $619.
General payments to Dr. Gnanaguruparan by program year, 2017 to 2025
General payments to Dr. Gnanaguruparan by kind, 2017 to 2025
- Food and beverage$2,20799%
- Education$141%
Companies that paid Dr. Gnanaguruparan the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Subramanian Gnanaguruparan'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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. Subramanian Gnanaguruparan
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. Subramanian Gnanaguruparan's NPI number?
Dr. Subramanian Gnanaguruparan's NPI number is 1396058533. It was assigned on July 16, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Subramanian Gnanaguruparan?
Dr. Subramanian Gnanaguruparan is a cardiologist in Newark, Delaware. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Subramanian Gnanaguruparan practice?
Dr. Gnanaguruparan practices at 200 Hygeia Dr, Newark, DE 19713. Dr. Gnanaguruparan's primary practice is ChristianaCare Primary Care at Woodstown in Newark, Delaware. Dmand AI also links Dr. Gnanaguruparan to 1 hospital, 5 medical groups and 4 group practices and clinics.
What is Dr. Subramanian Gnanaguruparan's office phone number?
The practice phone on file for Dr. Gnanaguruparan is (302) 623-7362.
What is Dr. Subramanian Gnanaguruparan's medical license number?
Dr. Gnanaguruparan holds Delaware license C1-0010444, one of the licenses on file in 3 states.
Which states has Dr. Subramanian Gnanaguruparan been licensed in?
Dmand AI has state licenses on file for Dr. Gnanaguruparan in Delaware, New Jersey and New York.
Which hospitals is Dr. Subramanian Gnanaguruparan affiliated with?
Dr. Gnanaguruparan is affiliated with Christiana Hospital. Dmand AI links Dr. Gnanaguruparan to 1 more hospital.
What medical group is Dr. Subramanian Gnanaguruparan part of?
Dr. Gnanaguruparan is linked to ChristianaCare. Dmand AI links Dr. Gnanaguruparan to 5 more medical groups.
Does Dr. Subramanian Gnanaguruparan accept Medicare?
Yes. CMS data shows Dr. Gnanaguruparan billed Medicare for 1,690 services in 2024, and Dr. Gnanaguruparan accepts Medicare assignment.
How many Medicare patients does Dr. Subramanian Gnanaguruparan see?
CMS counts 522 Medicare patients who saw Dr. Gnanaguruparan in 2024, with an average age of 75.
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What services does Dr. Subramanian Gnanaguruparan bill to Medicare?
In 2024, Dr. Gnanaguruparan's most billed Medicare services were hospital inpatient care (99232), heart test or procedure (93000) and office visit, established patient (99213).
What drugs does Dr. Subramanian Gnanaguruparan prescribe most?
In 2024 Medicare Part D data, Dr. Gnanaguruparan's most prescribed drugs by claims were Atorvastatin Calcium, Metoprolol Succinate and Eliquis.
Has Dr. Subramanian Gnanaguruparan received payments from drug or device companies?
CMS Open Payments shows $2,221 in general payments to Dr. Gnanaguruparan from 16 companies from 2017 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Subramanian Gnanaguruparan been practicing?
Dr. Gnanaguruparan graduated from medical school in 1995, 31 years ago.
Does Dr. Subramanian Gnanaguruparan do research?
Dmand AI links 3 publications to Dr. Gnanaguruparan, published from 2020 to 2025.
Who does Dr. Subramanian Gnanaguruparan publish with?
Dr. Gnanaguruparan's most frequent co-authors are Karuppiah Arunachalam, MD (1 shared paper), Pratik Bharat Rajpopat, MBBS (1 shared paper) and Ankit Vyas, MD (1 shared paper).
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