DR. NEILAYAN SEN M.D.
NPI 1407101314
Radiology - Radiation Oncology in Chicago, IL
About Dr. Neilayan Sen M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. NEILAYAN SEN M.D. (NPI 1407101314) is an individual radiation oncology provider in Chicago, Illinois, licensed in Illinois (125.061125) and active in the NPI registry since July 2012. He is enrolled in Medicare PECOS, is affiliated with Maine General Medical Center, and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
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. Neilayan Sen 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 Reassignment
Medicare enrollment records show Neilayan Sen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Augusta, ME 04330
- Reassigned Medicare billing, Maine enrollment
- 3 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 18
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Maine General Medical Center
Acute Care Hospitals · Augusta, MEPenobscot Bay Medical Center
Acute Care Hospitals · Rockport, MEWaldo County General Hospital
Critical Access Hospitals · Belfast, MERedington Fairview General Hospital
Critical Access Hospitals · Skowhegan, MEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60612 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHICAGO, IL 60612
CHICAGO, IL 60612
CHICAGO, IL 60612
CHICAGO, IL 60612
CHICAGO, IL 60612
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 Neilayan Sen's NPI number?
The NPI number for Neilayan Sen is 1407101314. It was assigned to this individual provider in the NPPES registry on July 17, 2012.
Where is Neilayan Sen located?
Neilayan Sen practices at 1653 W Congress Pkwy, Chicago, IL 60612. The listed phone number is (312) 942-5000.
What is Neilayan Sen's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is Neilayan Sen enrolled in Medicare?
Yes. Neilayan Sen 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 organization bills Medicare for Neilayan Sen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Neilayan Sen reassigns Medicare benefits to Radiation Oncology Associates, PA (Augusta, ME). The 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 Neilayan Sen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Neilayan Sen accept?
Health plans from Anthem Blue Cross and Blue Shield list Neilayan Sen 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 Neilayan Sen affiliated with any hospitals?
According to CMS data, Neilayan Sen is affiliated with Maine General Medical Center, Penobscot Bay Medical Center, Waldo County General Hospital and Redington Fairview General Hospital.
When was this NPI record last updated?
The NPPES record for Neilayan Sen was last updated on July 17, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.