Dr. Surianarayanan Karthikeyan, MD
- Medicare services, 2024
- 247
- Medicare patients, 2024
- 206
- Part D claims, 2024
- 272
- Hospital affiliations
- 2
- Industry payments
- $4,392
- Practice address
- 110 West Sixth Street, Oswego, NY 13069
- Practice phone
- Call (315) 349-5511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Karthikeyan'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. Surianarayanan Karthikeyan is a gastroenterologist in Oswego, New York
Dr. Karthikeyan practices at Oswego Hospital in Oswego, New York, part of Oswego Health.
Dr. Karthikeyan's NPI, 1881725836, was assigned on March 8, 2007. Dr. Karthikeyan holds New York license 220745-1.
- NPI
- 1881725836NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476532771
- NPI enumeration date
- March 8, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (315) 349-5511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 73
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Surianarayanan Karthikeyan practices at Oswego Hospital in Oswego, New York
Dr. Karthikeyan's primary practice is Oswego Hospital, at 110 West Sixth Street, Oswego, NY 13069 in Oswego County. The practice phone is (315) 349-5511.
- Oswego Hospital110 West Sixth Street, Oswego, NY 13069 · Oswego CountyPhone(315) 349-5511
Source: Dmand AI Affiliation Data
Dr. Surianarayanan Karthikeyan is affiliated with 3 sites of care and 5 medical groups
Dr. Karthikeyan's primary practice is Oswego Hospital in Oswego, New York, part of Oswego Health. Dr. Karthikeyan is also affiliated with Canton-Potsdam Hospital. The medical group on file is Oswego Health Medical Practice. Dmand AI also links Dr. Karthikeyan to 4 more medical groups and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Surianarayanan Karthikeyan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Karthikeyan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Oswego Hospital | Available with a free account |
| +2 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Oswego Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Surianarayanan Karthikeyan is one of 1,583 gastroenterologists in New York
Gastroenterology is Dr. Karthikeyan's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Karthikeyan's licenses on file in 2 states: New York and North Dakota.
Specialties and state licenses
- Gastroenterology, New YorkPrimary
- North Dakota license
Gastroenterologists near Dr. Karthikeyan
Counts of gastroenterologists 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. Surianarayanan Karthikeyan billed Medicare for 247 services in 2024
CMS data shows 247 Medicare services from Dr. Karthikeyan across 8 procedure codes in 2024, for 206 Medicare patients. Medicare paid $26,830 for them.
Dr. Karthikeyan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1952024: 16615%
- Office and hospital visits
- 2023: 1532024: 6458%
- Other services
- 2023: 172024: 17No change
Where Dr. Karthikeyan's Medicare services took place, 2024
- In an office3514%
- In a facility21286%
Dr. Karthikeyan compared with the New York median for gastroenterologists, 2024
- Dr. Karthikeyan
- New York median
- Medicare services
- 247vs 42141% below
- Medicare patients
- 206vs 23613% below
- Part D claims
- 157vs 38259% below
Medians across 1,551 gastroenterologists in New York with Dmand AI profiles that report each measure.
Dr. Karthikeyan'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. Surianarayanan Karthikeyan treated 206 Medicare patients in 2024, average age 74
CMS counts 206 Medicare patients who saw Dr. Karthikeyan in 2024. The largest group is 65 to 74, with 93 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.58, 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. Karthikeyan's median patient age at 63, with 49% women.
Dr. Karthikeyan's Medicare patients by age, 2024
Dr. Karthikeyan's Medicare patients by sex, 2024
- Women10250%
- Men10450%
Chronic conditions among Dr. Karthikeyan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis45%
- Heart failure41%
- Chronic kidney disease37%
- Diabetes36%
- Ischemic heart disease36%
- COPD33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Karthikeyan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women49%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Surianarayanan Karthikeyan wrote 272 Medicare Part D claims in 2024
In 2024, Dr. Karthikeyan wrote 272 Medicare Part D claims for 110 patients. 84% of them were for generic drugs. CMS names the drug for 157 of them, across 3 drugs with 11 or more claims each, at $1,687 in total drug cost. In 2023, CMS named 136 claims across 3 drugs.
Dr. Karthikeyan's Part D claims by kind of drug, 2024
- Generic229 claims84%
- Brand-name43 claims16%
Dr. Karthikeyan'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. Karthikeyan's Part D claims, 2024
- Antibiotics4%11 of 272 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: 1362024: 15715%
Drugs named by CMS: 3 in 2024, 3 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
Dr. Surianarayanan Karthikeyan ranks in the 81st percentile for colonoscopy in Medicare
Dr. Karthikeyan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 105 procedures of colonoscopy by Dr. Karthikeyan, more than 81% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Karthikeyan ranks in Medicare procedure volume
- Colonoscopy
- 81st percentile105 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 70th percentile71 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Surianarayanan Karthikeyan received $4,392 in industry payments from 2016 to 2025
CMS Open Payments shows 240 general payments to Dr. Karthikeyan from 24 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 88% of the total. Abbvie Inc. paid the most, $939.
General payments to Dr. Karthikeyan by program year, 2016 to 2025
General payments to Dr. Karthikeyan by kind, 2016 to 2025
- Food and beverage$3,87688%
- Debt forgiveness$50912%
- Education$70%
Companies that paid Dr. Karthikeyan 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. Surianarayanan Karthikeyan'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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| 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. Surianarayanan Karthikeyan
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. Surianarayanan Karthikeyan's NPI number?
Dr. Surianarayanan Karthikeyan's NPI number is 1881725836. It was assigned on March 8, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Surianarayanan Karthikeyan?
Dr. Surianarayanan Karthikeyan is a gastroenterologist in Oswego, New York. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Surianarayanan Karthikeyan practice?
Dr. Karthikeyan practices at 110 West Sixth Street, Oswego, NY 13069. Dr. Karthikeyan's primary practice is Oswego Hospital in Oswego, New York, part of Oswego Health. Dmand AI also links Dr. Karthikeyan to 4 medical groups and 1 group practice or clinic.
What is Dr. Surianarayanan Karthikeyan's office phone number?
The practice phone on file for Dr. Karthikeyan is (315) 349-5511.
What is Dr. Surianarayanan Karthikeyan's medical license number?
Dr. Karthikeyan holds New York license 220745-1, one of the licenses on file in 2 states.
Which states has Dr. Surianarayanan Karthikeyan been licensed in?
Dmand AI has state licenses on file for Dr. Karthikeyan in New York and North Dakota.
Which hospitals is Dr. Surianarayanan Karthikeyan affiliated with?
Dr. Karthikeyan practices at Oswego Hospital in Oswego, New York. Dr. Karthikeyan is also affiliated with Canton-Potsdam Hospital.
What medical group is Dr. Surianarayanan Karthikeyan part of?
Dr. Karthikeyan is linked to Oswego Health Medical Practice. Dmand AI links Dr. Karthikeyan to 4 more medical groups.
Does Dr. Surianarayanan Karthikeyan accept Medicare?
Yes. CMS data shows Dr. Karthikeyan billed Medicare for 247 services in 2024, and Dr. Karthikeyan accepts Medicare assignment.
How many Medicare patients does Dr. Surianarayanan Karthikeyan see?
CMS counts 206 Medicare patients who saw Dr. Karthikeyan in 2024, with an average age of 74.
Show 4 more questionsShow fewer questions
What services does Dr. Surianarayanan Karthikeyan bill to Medicare?
In 2024, Dr. Karthikeyan's most billed Medicare services were surgery: digestive system (43239), surgery: digestive system (45385) and office visit, established patient (99213).
What drugs does Dr. Surianarayanan Karthikeyan prescribe most?
In 2024 Medicare Part D data, Dr. Karthikeyan's most prescribed drugs by claims were Omeprazole, Pantoprazole Sodium and Famotidine.
Has Dr. Surianarayanan Karthikeyan received payments from drug or device companies?
CMS Open Payments shows $4,392 in general payments to Dr. Karthikeyan from 24 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Surianarayanan Karthikeyan been practicing?
Dr. Karthikeyan graduated from medical school in 1979, 47 years ago.
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