Brian Riordan, M.D.
Physical Medicine & Rehabilitation Physician · Danbury, CT
Brian Riordan, M.D. is a physical medicine & rehabilitation physician with a practice address in Danbury, Connecticut, and NPI 1326082751, issued on Jun 15, 2006. Check the license (Connecticut 044109, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Brian Riordan
- Credential
- M.D.
- Primary taxonomy
- Physical Medicine & Rehabilitation Physician 208100000X
- License number
- 044109 CT
Self-reported in NPPES; status is on the state search - Practice location
- 235 Main St, Danbury, CT 06810
- Phone
- (203) 730-5929
- Enumerated
- Jun 15, 2006
- Record last updated
- Oct 25, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20060819000014); accepts Medicare assignment
- Medical or professional school
- University Of Connecticut School Of Medicine, 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physical medicine & rehabilitation physician records → All 192 in Connecticut → Look up another NPI →
Also registered at 235 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Beth Aaronson, M.D.Physical Medicine & Rehabilitation Physician1417991456
- William Anderson, PTPhysical Therapist1316560956
- Vito Boffoli, MS OTR/LOccupational Therapist1033732680
- Jean Chory, PTPhysical Therapist1275155897
- Mary D'Arco, M.S., CCC-SLPSpeech-Language Pathologist1831705334
- Jeffrey EspinoPhysical Therapist1740682541
Verify Brian Riordan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 044109Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average physical medicine & rehabilitation physician in 2024
1,922 Medicare Part D claims for 249 beneficiaries, against an average of 727 among the 7,448 providers of this specialty who prescribed in Part D. 744 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen229 claims
- Gabapentin222 claims
- Tramadol Hcl168 claims
- Oxycodone Hcl128 claims
- Baclofen124 claims
- Pregabalin107 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): 94.2 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: $16.31
1 payment: food and beverage; the largest payer was Pfizer Inc. The 3,895 providers of this specialty with any payment received $1,237.86 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
- Nuvance Health Medical Practice CT IncSouthbury, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brian Riordan among 192 physical medicine & rehabilitation physician records in Connecticut
Brian Riordan, M.D. is one of 192 physical medicine & rehabilitation physician records with a practice address in Connecticut. 56% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 66% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2002 · median 2004 among the 98 with a school on file
- Record last updated2010 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208100000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physical Medicine & Rehabilitation Physician providers in Connecticut
There are 192 physical medicine & rehabilitation physician records in Connecticut.
All 192 in Connecticut → Every provider in Danbury → Physical Medicine & Rehabilitation Physician nationwide →
The 8 physical medicine & rehabilitation physician records with the nearest ZIP codes
- Beth Aaronson, M.D.Danbury, CT 068101417991456
- Henry Chen, MDDanbury, CT 068101245868280
- Mario Lopez-AvalosDanbury, CT 068101528680113
- Shannon MahoneyDanbury, CT 068101740926609
- Scott NeumannDanbury, CT 068101437772068
- Mitchell Prywes, MDDanbury, CT 068101538172861
- Randolph Trowbridge, MDDanbury, CT 068101720098247
- Oz PariserDanbury, CT 068111821491218
Common questions
What is Brian Riordan, M.D.'s NPI number?
Brian Riordan, M.D.'s National Provider Identifier (NPI) is 1326082751, issued on Jun 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Brian Riordan, M.D. located?
The NPPES record lists a practice address at 235 Main St, Danbury, CT, 06810. Phone: (203) 730-5929. Providers update this record themselves, so call before visiting.
How can I verify Brian Riordan, M.D.'s license?
NPPES lists Connecticut license number 044109, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Brian Riordan, M.D. prescribe under Medicare Part D?
In 2024, Brian Riordan, M.D. had 1,922 Medicare Part D claims for 249 beneficiaries; the average among physical medicine & rehabilitation physician prescribers was 727. Part D covers Medicare prescriptions only.
What is Brian Riordan, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.2 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.