DR. NICHOLAS HENRY FIEBACH M.D.
NPI 1679669675
Internal Medicine in Stamford, CT
About Dr. Nicholas Henry Fiebach M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. NICHOLAS HENRY FIEBACH M.D. (NPI 1679669675) is an individual internal medicine provider in Stamford, Connecticut, licensed in Connecticut (28139) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS and is a graduate of New York University School Of Medicine (1980).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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. Nicholas Henry Fiebach 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
4Medicare enrollment records show Nicholas Fiebach reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stamford, CT 06901
- Reassigned Medicare billing, Connecticut enrollment
- 132 clinicians in this Medicare group
Stamford, CT 06907
- Reassigned Medicare billing, Connecticut enrollment
- 496 clinicians in this Medicare group
New York, NY 10032
- Reassigned Medicare billing, New York enrollment
- 612 clinicians in this Medicare group
Fort Lee, NJ 07024
- Reassigned Medicare billing, New York enrollment
- 1,048 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06902 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STAMFORD, CT 06902
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 Nicholas Fiebach's NPI number?
The NPI number for Nicholas Fiebach is 1679669675. It was assigned to this individual provider in the NPPES registry on October 5, 2006.
Where is Nicholas Fiebach located?
Nicholas Fiebach practices at 1 Hospital Plz, Stamford, CT 06902. The listed phone number is (203) 276-7485.
What is Nicholas Fiebach's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Nicholas Fiebach enrolled in Medicare?
Yes. Nicholas Fiebach 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 Nicholas Fiebach's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nicholas Fiebach reassigns Medicare benefits to 4 organizations: Optimus Health Care (Stamford, CT), Stamford Health Medical Group Inc (Stamford, CT), Trustees Of Columbia University In The City Of New York (New York, NY) and Trustees Of Columbia University In The City Of New York (Fort Lee, 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 Nicholas Fiebach's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Nicholas Fiebach was last updated on January 17, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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. Nicholas Henry Fiebach, M.D. · NPI 1679669675
Internal Medicine physician in Stamford, Connecticut. Individual provider, active in the CMS NPPES registry since October 5, 2006.
## Identity
- **NPI:** 1679669675 (Entity type: Individual)
- **Enumerated:** October 5, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 28139 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 HOSPITAL PLZ, Stamford, CT 06902-3602
- **Phone:** (203) 276-7485 · **Fax:** (203) 276-7368
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Optimus Health Care (NPI 1942574082, Stamford, CT); Stamford Health Medical Group Inc (NPI 1154633980, Stamford, CT); Trustees Of Columbia University In The City Of New York (NPI 1437176047, New York, NY); Trustees Of Columbia University In The City Of New York (NPI 1982993184, Fort Lee, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York University School Of Medicine, class of 1980
## Record status
- **NPPES last updated:** January 17, 2019
- **Other identifiers:** Medicaid 02490095 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1679669675) · Data from the CMS NPPES public registry.