NELSON GELFMAN, MD, DIALYSIS UNIT
NPI 1184649667
Clinic/Center - End-Stage Renal Disease (ESRD) Treatment in Danbury, CT
About Nelson Gelfman, Md, Dialysis Unit NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NELSON GELFMAN, MD, DIALYSIS UNIT (NPI 1184649667) is a healthcare organization registered as an end-stage renal disease (esrd) treatment in Danbury, Connecticut and active in the NPI registry since July 2006. The organization lists Brenda Plaag, Chief Privacy Officer, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Nelson Gelfman, Md, Dialysis Unit is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
155Medicare enrollment records show 155 clinicians reassign Medicare billing to Nelson Gelfman, MD, Dialysis Unit, which bills Medicare for the services they deliver. Of these, 31 practice at this address and 80 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 16
Nearest to this location (20)
See all 155Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Danbury Hospital's NPI number?
The NPI number for Danbury Hospital is 1184649667. It was assigned to this organization in the NPPES registry on July 13, 2006. The provider is also known as Nelson Gelfman, MD, Dialysis Unit.
Where is Danbury Hospital located?
Danbury Hospital is located at 24 Hospital Ave Nelson Gelfman, MD., Dialysis Unit, Danbury, CT 06810. The listed phone number is (203) 797-7382.
What is Danbury Hospital's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in End-Stage Renal Disease (ESRD) Treatment, with taxonomy code 261QE0700X.
Is Danbury Hospital enrolled in Medicare?
Yes. Danbury Hospital is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Danbury Hospital?
According to the CMS Revalidation Reassignment List (October 2026 release), 155 clinicians in 16 Medicare specialties reassign their Medicare billing to Danbury Hospital. A 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 the clinician's services. The largest specialties are Emergency Medicine (71), Nurse Practitioner (18) and Psychiatry (15). Of these, 31 practice at this address and 80 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Danbury Hospital was last updated on August 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Nelson Gelfman, Md, Dialysis Unit · NPI 1184649667
End-Stage Renal Disease (ESRD) Treatment organization in Danbury, Connecticut. Organization record, active in the CMS NPPES registry since July 13, 2006.
## Identity
- **NPI:** 1184649667 (Entity type: Organization)
- **Enumerated:** July 13, 2006
- **Primary specialty:** Clinic/Center - End-Stage Renal Disease (ESRD) Treatment · taxonomy 261QE0700X
- **Legal business name:** Danbury Hospital
- **Organization subpart:** No
- **Authorized official:** Brenda Plaag, CHIEF PRIVACY OFFICER
## Practice location
- **Address:** 24 HOSPITAL AVE, NELSON GELFMAN, MD., DIALYSIS UNIT, Danbury, CT 06810-6099
- **Phone:** (203) 797-7382
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 155 clinicians in 16 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Emergency Medicine (71), Nurse Practitioner (18), Psychiatry (15); 31 practice at this address and 80 within 10 miles; [full list](https://npiprofile.com/npi/1184649667/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 22, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1184649667) · Data from the CMS NPPES public registry.