Michael O'Riley Rigsby, M.D.
Infectious Disease Physician · New Haven, CT
Michael O'Riley Rigsby, M.D. is an infectious disease physician with a practice address in New Haven, Connecticut, and NPI 1912946005, issued on Jun 5, 2006. Check the license (Connecticut 031214, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Michael O'Riley Rigsby
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 031214 CT
Self-reported in NPPES; status is on the state search - Practice location
- 55 Lock Street, New Haven, CT 06520
- Phone
- (203) 432-0076
- Enumerated
- Jun 5, 2006
- Record last updated
- Apr 6, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (203) 432-7289
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 202 in Connecticut → Look up another NPI →
Also registered at 55 Lock Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- William Aquila, PAPhysician Assistant1164463469
- David Arendt, ODOptometrist1497788764
- Thomas Brady, PA-CPhysician Assistant1447287826
- Joan Cho, MDEndocrinology, Diabetes & Metabolism Physician1942242490
- Elizabeth Cole, CNM, RNAdvanced Practice Midwife1306873161
- Christine Colton, MDDiagnostic Radiology Physician1942287396
Verify Michael O'Riley Rigsby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 031214Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average infectious disease physician in 2024
94 Medicare Part D claims for 34 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 37% of claims.
Most prescribed
- Dovato14 claims
- Biktarvy13 claims
- Amlodipine Besylate12 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.
Michael O'Riley Rigsby among 202 infectious disease physician records in Connecticut
Michael O'Riley Rigsby, M.D. is one of 202 infectious disease physician records with a practice address in Connecticut. 77% 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, 57% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 68% of these records are
- Record last updated2011 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Connecticut
There are 202 infectious disease physician records in Connecticut.
All 202 in Connecticut → Every provider in New Haven → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Samit JoshiNew Haven, CT 065201477735413
- Marwan Azar, M.D.New Haven, CT 065191780979526
- Thilinie Bandaranayake, M.D.New Haven, CT 065191598085391
- Arti Barnes, MD, MBBS, MPHNew Haven, CT 065191013127455
- Patrick Cudahy, M.D.New Haven, CT 065191477867331
- Shana Gleeson, M.D.New Haven, CT 065191134489172
- Benjamin Goldman-Israelow, M.D., PH.D.New Haven, CT 065191629425806
- Matthew Grant, M.D.New Haven, CT 065191558579045
Common questions
What is Michael O'Riley Rigsby, M.D.'s NPI number?
Michael O'Riley Rigsby, M.D.'s National Provider Identifier (NPI) is 1912946005, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael O'Riley Rigsby, M.D. located?
The NPPES record lists a practice address at 55 Lock Street, New Haven, CT, 06520. Phone: (203) 432-0076. Providers update this record themselves, so call before visiting.
How can I verify Michael O'Riley Rigsby, M.D.'s license?
NPPES lists Connecticut license number 031214, 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 Michael O'Riley Rigsby, M.D. prescribe under Medicare Part D?
In 2024, Michael O'Riley Rigsby, M.D. had 94 Medicare Part D claims for 34 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
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.