CARL W NISSEN MD
NPI 1982601530
Orthopaedic Surgery in Hartford, CT
About Carl W Nissen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CARL W NISSEN MD (NPI 1982601530) is an individual orthopaedic surgery provider in Hartford, Connecticut, licensed in Connecticut (033613) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Connecticut School Of Medicine (1990).
NPPES Registry Identity
Specialties & Licenses 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Carl W Nissen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Carl Nissen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hartford, CT 06106
- Reassigned Medicare billing, Connecticut enrollment
Hartford, CT 06102
- Reassigned Medicare billing, Connecticut enrollment
- Also billed through NPI 1770696643 (Connecticut)
- 1,333 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
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06106 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Carl Nissen's NPI number?
The NPI number for Carl Nissen is 1982601530. It was assigned to this individual provider in the NPPES registry on June 28, 2005.
Where is Carl Nissen located?
Carl Nissen practices at 31 Seymour St Ste 204, Hartford, CT 06106. The listed phone number is (860) 421-3233.
What is Carl Nissen's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Carl Nissen enrolled in Medicare?
Yes. Carl Nissen is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Carl Nissen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Carl Nissen reassigns Medicare benefits to 2 organizations: Prism Sports Medicine, LLC (Hartford, CT) and Hartford Hospital (Hartford, CT). 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 Carl Nissen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Carl Nissen accept?
Health plans from Anthem Blue Cross and Blue Shield list Carl Nissen 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.
When was this NPI record last updated?
The NPPES record for Carl Nissen was last updated on November 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.
# Carl W Nissen, MD · NPI 1982601530
Orthopaedic Surgery physician in Hartford, Connecticut. Individual provider, active in the CMS NPPES registry since June 28, 2005.
## Identity
- **NPI:** 1982601530 (Entity type: Individual)
- **Enumerated:** June 28, 2005
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** 033613 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 31 SEYMOUR ST STE 204, Hartford, CT 06106-5505
- **Phone:** (860) 421-3233
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Prism Sports Medicine, LLC (NPI 1851920029, Hartford, CT); Hartford Hospital (NPI 1407806391, Hartford, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Connecticut School Of Medicine, class of 1990
## Record status
- **NPPES last updated:** November 19, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1982601530) · Data from the CMS NPPES public registry.