Kenneth J. Rieger, M.D.
Orthopaedic Surgery Physician · Chatham, NJ
Kenneth J. Rieger, M.D. is an orthopaedic surgery physician with a practice address in Chatham, New Jersey, and NPI 1275559700, issued on Jul 15, 2006. Check the license (New Jersey 25MA08296300, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Kenneth J. Rieger
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- 25MA08296300 NJ
25MA08579500 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 40 Main St, Chatham, NJ 07928
- Phone
- (973) 635-0800
- Enumerated
- Jul 15, 2006
- Record last updated
- Feb 18, 2026
- Fax
- (973) 635-6254
- Medicaid IDs
- 200828910 IN
64125370 KY - Medicare enrollment
- Enrolled (PECOS I20071017000225); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2001
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 690 in New Jersey → Look up another NPI →
Also registered at 40 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Alapatt, M.D.Orthopaedic Surgery Physician1639401250
- Elena Barros, PA-CPhysician Assistant1487910469
- Matthew Cassells, PHYSICIAN ASSISTANTSurgical Physician Assistant1346353208
- Shayna Chevinsky, PA-CPhysician Assistant1598263253
- James Clark-Schoeb, M.D.Orthopaedic Surgery Physician1477523058
- Denise Dasti, APNAdult Health Nurse Practitioner1932162831
Verify Kenneth J. Rieger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA08296300Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
15 Medicare Part D claims for 11 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 77.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $197.20
2 payments; by number, the most common kind was food and beverage; the largest payer was Alphatec Spine, Inc. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- New Jersey Spine Center, LLCChatham, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kenneth J. Rieger among 690 orthopaedic surgery physician records in New Jersey
Kenneth J. Rieger, M.D. is one of 690 orthopaedic surgery physician records with a practice address in New Jersey. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 42% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2001 · median 2001 among the 444 with a school on file
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in New Jersey
There are 690 orthopaedic surgery physician records in New Jersey.
All 690 in New Jersey → Every provider in Chatham → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Michael Alapatt, M.D.Chatham, NJ 079281639401250
- James Clark-Schoeb, M.D.Chatham, NJ 079281477523058
- Christine Baumann, APNCedar Knolls, NJ 079271831940493
- Robert Dagostini, MDCedar Knolls, NJ 079271407880115
- Aaron Forbes, MDCedar Knolls, NJ 079271689808826
- Michael Fiore, M.D.Far Hills, NJ 079311437285715
- Stephanie Adam, DOFlorham Park, NJ 079321447459292
- Eric Black, MDFlorham Park, NJ 079321982863338
Common questions
What is Kenneth J. Rieger, M.D.'s NPI number?
Kenneth J. Rieger, M.D.'s National Provider Identifier (NPI) is 1275559700, issued on Jul 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kenneth J. Rieger, M.D. located?
The NPPES record lists a practice address at 40 Main St, Chatham, NJ, 07928. Phone: (973) 635-0800. Providers update this record themselves, so call before visiting.
How can I verify Kenneth J. Rieger, M.D.'s license?
NPPES lists New Jersey license number 25MA08296300, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kenneth J. Rieger, M.D. prescribe under Medicare Part D?
In 2024, Kenneth J. Rieger, M.D. had 15 Medicare Part D claims for 11 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is Kenneth J. Rieger, M.D.'s MIPS final score?
The 2023 MIPS final score is 77.4 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.