KENNETH J RIEGER M.D.
NPI 1275559700
Orthopaedic Surgery in Chatham, NJ
About Kenneth J Rieger M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KENNETH J RIEGER M.D. (NPI 1275559700) is an individual orthopaedic surgery provider in Chatham, New Jersey, licensed in New Jersey (25MA08296300) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Morristown Medical Center, and maintains a secondary practice location in Sparta.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 15
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
Kenneth J Rieger 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 Kenneth Rieger reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chatham, NJ 07928
- Reassigned Medicare billing, New Jersey enrollment
- 8 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.
Morristown Medical Center
Acute Care Hospitals · Morristown, NJNewton Medical Center
Acute Care Hospitals · Newton, NJPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 07928 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.
Reported Quality Measures
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.
CHATHAM, NJ 07928
CHATHAM, NJ 07928
CHATHAM, NJ 07928
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 Kenneth Rieger's NPI number?
The NPI number for Kenneth Rieger is 1275559700. It was assigned to this individual provider in the NPPES registry on July 15, 2006.
Where is Kenneth Rieger located?
Kenneth Rieger practices at 40 Main St, Chatham, NJ 07928. The listed phone number is (973) 635-0800.
What is Kenneth Rieger's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Kenneth Rieger enrolled in Medicare?
Yes. Kenneth Rieger 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 Kenneth Rieger's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kenneth Rieger reassigns Medicare benefits to New Jersey Spine Center, LLC (Chatham, NJ). 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 Kenneth Rieger's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Kenneth Rieger affiliated with any hospitals?
According to CMS data, Kenneth Rieger is affiliated with Morristown Medical Center and Newton Medical Center.
When was this NPI record last updated?
The NPPES record for Kenneth Rieger was last updated on February 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Kenneth J Rieger, M.D. · NPI 1275559700
Orthopaedic Surgery physician in Chatham, New Jersey. Individual provider, active in the CMS NPPES registry since July 15, 2006.
## Identity
- **NPI:** 1275559700 (Entity type: Individual)
- **Enumerated:** July 15, 2006
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** 25MA08296300 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 40 MAIN ST, Chatham, NJ 07928-2431
- **Phone:** (973) 635-0800 · **Fax:** (973) 635-6254
## 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:** New Jersey Spine Center, LLC (NPI 1881632461, Chatham, NJ), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Columbia University College Of Physicians And Surgeons, class of 2001
## Record status
- **NPPES last updated:** February 18, 2026
- **Other identifiers:** Other 000000485768 (KY); Other 000000495770 (KY); Other 01062330B (IN); and 12 more
---
Source: [NPI Profile](https://npiprofile.com/npi/1275559700) · Data from the CMS NPPES public registry.