DR. SURIANARAYANAN KARTHIKEYAN MD
NPI 1881725836
Internal Medicine - Gastroenterology in Fargo, ND
About Dr. Surianarayanan Karthikeyan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SURIANARAYANAN KARTHIKEYAN MD (NPI 1881725836) is an individual gastroenterology provider in Fargo, North Dakota, licensed in New York (220745-1) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS, is affiliated with Oswego Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
Other Identifiers 6
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Surianarayanan Karthikeyan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Surianarayanan Karthikeyan reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Warsaw, NY 14569
- Reassigned Medicare billing, New York enrollment
- 1,030 clinicians in this Medicare group
Rochester, NY 14624
- Reassigned Medicare billing, New York enrollment
- 1,442 clinicians in this Medicare group
Rochester, NY 14626
- Reassigned Medicare billing, New York enrollment
- 2,285 clinicians in this Medicare group
Oswego, NY 13126
- Reassigned Medicare billing, New York enrollment
- 70 clinicians in this Medicare group
Potsdam, NY 13676
- Reassigned Medicare billing, New York enrollment
- 414 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 8
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Oswego Hospital
Acute Care Hospitals · Oswego, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 58102 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Surianarayanan Karthikeyan's NPI number?
The NPI number for Surianarayanan Karthikeyan is 1881725836. It was assigned to this individual provider in the NPPES registry on March 8, 2007.
Where is Surianarayanan Karthikeyan located?
Surianarayanan Karthikeyan practices at 321 8th Ave N, Fargo, ND 58102. The listed phone number is (701) 234-2525.
What is Surianarayanan Karthikeyan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Surianarayanan Karthikeyan enrolled in Medicare?
Yes. Surianarayanan Karthikeyan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Surianarayanan Karthikeyan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Surianarayanan Karthikeyan reassigns Medicare benefits to 5 organizations: Western New York Medical Practice PC (Warsaw, NY), The Unity Hospital Of Rochester (Rochester, NY), Rochester General Hospital (Rochester, NY), Physician Care PC (Oswego, NY) and Canton-Potsdam Hospital (Potsdam, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Surianarayanan Karthikeyan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Surianarayanan Karthikeyan affiliated with any hospitals?
According to CMS data, Surianarayanan Karthikeyan is affiliated with Oswego Hospital.
When was this NPI record last updated?
The NPPES record for Surianarayanan Karthikeyan was last updated on February 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Surianarayanan Karthikeyan, MD · NPI 1881725836
Gastroenterology physician in Fargo, North Dakota. Individual provider, active in the CMS NPPES registry since March 8, 2007.
## Identity
- **NPI:** 1881725836 (Entity type: Individual)
- **Enumerated:** March 8, 2007
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 220745-1 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 321 8TH AVE N, Fargo, ND 58102-4550
- **Phone:** (701) 234-2525
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Western New York Medical Practice PC (NPI 1306214689, Warsaw, NY); The Unity Hospital Of Rochester (NPI 1720471246, Rochester, NY); Rochester General Hospital (NPI 1356412712, Rochester, NY); Physician Care PC (NPI 1073868113, Oswego, NY); Canton-Potsdam Hospital (NPI 1568548782, Potsdam, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1979
## Record status
- **NPPES last updated:** February 5, 2025
- **Other identifiers:** Medicaid 02151857 (NY); Other 000526402002 (NY); Other P040220745 (NY); and 3 more
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Source: [NPI Profile](https://npiprofile.com/npi/1881725836) · Data from the CMS NPPES public registry.