Internal Medicine - Gastroenterology Specialists in Union, NJ
Browse 13 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in Union, New Jersey.
How Union compares with the U.S.
13 active clinicians in Internal Medicine - Gastroenterology list a practice address in Union, NJ in the NPI registry.
Union has fewer than 10,000 residents, so rates per 100,000 people change a lot with each clinician and are not compared here.
100% of clinicians in Internal Medicine - Gastroenterology in Union listed in the CMS Medicare file (11 of 11) accept Medicare assignment. That is similar to the New Jersey share of 98%.
What is Medicare assignment?
A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.
Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.
45% of clinicians in Internal Medicine - Gastroenterology in Union listed in the CMS Medicare file (5 of 11) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the New Jersey share of 54%.
About the telehealth indicator
The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.
These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.
Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com · Methodology
Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File.
Internal Medicine - Gastroenterology Medicare (PECOS) Enrollment & Ordering Eligibility
Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine - Gastroenterology practitioners in Union, NJ
Dr. Daniel Bodek , DO
Internal Medicine - Gastroenterology
Dr. Sujala Chirla , MD
Internal Medicine - Gastroenterology
Dr. Robert I Greenblatt , MD
Internal Medicine - Gastroenterology
Dr. Kunal Grover , MD
Internal Medicine - Gastroenterology
Dr. Pradeep S. Mahal , MD
Internal Medicine - Gastroenterology
Dr. Arun Reji Mathew , MD
Internal Medicine - Gastroenterology
Dr. Prakriti Singh Merchant , MD
Internal Medicine - Gastroenterology
Dr. Samiappan Muthusamy , MD
Internal Medicine - Gastroenterology
Dr. Dhanasekaran Ramasamy , MD
Internal Medicine - Gastroenterology
Geethan Sivananthan
Internal Medicine - Gastroenterology
Dr. Patrick Tempera , MD
Internal Medicine - Gastroenterology
Dr. Michael Joseph Viksjo , MD
Internal Medicine - Gastroenterology
Dr. Ramon A Fernandez-Ledon , MD
Internal Medicine - Gastroenterology
Frequently Asked Questions about Internal Medicine - Gastroenterology in Union
Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the New Jersey licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.
This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.
Other Specialties in Union
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