DR. ARUN REJI MATHEW M.D.
NPI 1265878185
Internal Medicine - Gastroenterology in Union, NJ
About Dr. Arun Reji Mathew M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ARUN REJI MATHEW M.D. (NPI 1265878185) is an individual gastroenterology provider in Union, New Jersey, licensed in New Jersey (25MA10575400) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS, is affiliated with Robert Wood Johnson University Hospital At Rahway, and is a graduate of Rutgers New Jersey Medical School (2013).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
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. Arun Reji Mathew M.d. 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 Arun Mathew reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Union, NJ 07083
- Reassigned Medicare billing, New Jersey enrollment
- Medicare enrollment name: Rf Ledon MD PC
- 21 clinicians in this Medicare group
Elizabeth, NJ 07202
- Reassigned Medicare billing, New Jersey enrollment
- 1,894 clinicians in this Medicare group
Mountainside, NJ 07092
- Reassigned Medicare billing, New Jersey enrollment
- Also billed through NPI 1184778060 (New Jersey)
- 4 clinicians in this Medicare group
West Orange, NJ 07052
- Reassigned Medicare billing, New Jersey enrollment
- 757 clinicians in this Medicare group
New Brunswick, NJ 08901
- Reassigned Medicare billing, New Jersey enrollment
- 259 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 9
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Robert Wood Johnson University Hospital At Rahway
Acute Care Hospitals · Rahway, NJTrinitas Regional Medical Center
Acute Care Hospitals · Elizabeth, NJPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 07083 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
UNION, NJ 07083
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 Arun Mathew's NPI number?
The NPI number for Arun Mathew is 1265878185. It was assigned to this individual provider in the NPPES registry on May 19, 2013.
Where is Arun Mathew located?
Arun Mathew practices at 1308 Morris Ave Ste 102, Union, NJ 07083. The listed phone number is (908) 851-2770.
What is Arun Mathew's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Arun Mathew enrolled in Medicare?
Yes. Arun Mathew 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 Arun Mathew's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Arun Mathew reassigns Medicare benefits to 5 organizations: Rf Ledon M.D. P.C. (Union, NJ), Barnabas Health Medical Group PC (Elizabeth, NJ), Morris Avenue Endoscopy LLC (Mountainside, NJ), Barnabas Health Medical Group, PC (West Orange, NJ) and Rutgers Health-Rwj Neurosurgery Faculty (New Brunswick, NJ). 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 Arun Mathew's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Arun Mathew accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Arun Mathew as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Arun Mathew affiliated with any hospitals?
According to CMS data, Arun Mathew is affiliated with Robert Wood Johnson University Hospital At Rahway and Trinitas Regional Medical Center.
When was this NPI record last updated?
The NPPES record for Arun Mathew was last updated on October 12, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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. Arun Reji Mathew, M.D. · NPI 1265878185
Gastroenterology physician in Union, New Jersey. Individual provider, active in the CMS NPPES registry since May 19, 2013.
## Identity
- **NPI:** 1265878185 (Entity type: Individual)
- **Enumerated:** May 19, 2013
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 25MA10575400 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 1308 MORRIS AVE STE 102, Union, NJ 07083-3328
- **Phone:** (908) 851-2770
## 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): Rf Ledon M.D. P.C. (NPI 1912160516, Union, NJ); Barnabas Health Medical Group PC (NPI 1841557246, Elizabeth, NJ); Morris Avenue Endoscopy LLC (NPI 1780747394, Mountainside, NJ); Barnabas Health Medical Group, PC (NPI 1447206420, West Orange, NJ); Rutgers Health-Rwj Neurosurgery Faculty (NPI 1710012604, New Brunswick, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rutgers New Jersey Medical School, class of 2013
## Record status
- **NPPES last updated:** October 12, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1265878185) · Data from the CMS NPPES public registry.