Liam Gerard O'Riordan, DO
Emergency Medicine Physician · Syracuse, NY
Liam Gerard O'Riordan, DO is an emergency medicine physician with a practice address in Syracuse, New York, and NPI 1235626979, issued on Apr 18, 2018. Check the license (New York 311919, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Liam Gerard O'Riordan
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 311919 NY
Self-reported in NPPES; status is on the state search - Practice location
- 301 Prospect Ave, Syracuse, NY 13203
- Phone
- (315) 448-5111
- Enumerated
- Apr 18, 2018
- Record last updated
- Mar 7, 2022
- Medicare enrollment
- Enrolled (PECOS I20210812000248); accepts Medicare assignment
- Medical or professional school
- Touro Un Col Of Osteopathic Medicine, New York, 2018
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 5,025 in New York → Look up another NPI →
Also registered at 301 Prospect Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Eduardo Aguilar-Padilla, DDSStudent in an Organized Health Care Education/Training Program1124400841
- Ameera Ahmed, MDAnesthesiology Physician1265402135
- Mohammad Ayyid AhmedStudent in an Organized Health Care Education/Training Program1215725742
- Myra Ahmed, M.DStudent in an Organized Health Care Education/Training Program1033901376
Verify Liam Gerard O'Riordan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 311919Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% more Medicare Part D claims than the average emergency medicine physician in 2024
289 Medicare Part D claims for 182 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 27 claims were for opioids.
Most prescribed
- Cefdinir32 claims
- Prednisone32 claims
- Oxycodone-Acetaminophen24 claims
- Ondansetron Hcl21 claims
- Ibuprofen20 claims
- Cephalexin17 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.
Bills Medicare through one group practice
- Nyack Emergency Medical Association PLLCNyack, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Liam Gerard O'Riordan among 5,025 emergency medicine physician records in New York
Liam Gerard O'Riordan, DO is one of 5,025 emergency medicine physician records with a practice address in New York. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 75% of them.
- NPI issued2018 · 75% of these records are older, 21% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2018 · median 2013 among the 3,232 with a school on file
- Record last updated2022 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
167 emergency medicine physician records list a practice address in Syracuse
They are 167 of the 9,922 NPPES records with a practice address in Syracuse, and 5,025 emergency medicine physician records in New York.
All 5,025 in New York → Every provider in Syracuse → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Olivia Andrade, M.D.Syracuse, NY 132031871744763
- James Campagna, MDSyracuse, NY 132031588709414
- Francine Cantor, MDSyracuse, NY 132031811925043
- Joseph Capogreco, MDSyracuse, NY 132031235516659
- Benjamin Craxton, MDSyracuse, NY 132031063941433
- David Dobies, M.D.Syracuse, NY 132031801921242
- Sandra Holland, MDSyracuse, NY 132031417999376
- Kyle Ivers, MB BCH BAOSyracuse, NY 132031407436868
Common questions
What is Liam Gerard O'Riordan, DO's NPI number?
Liam Gerard O'Riordan, DO's National Provider Identifier (NPI) is 1235626979, issued on Apr 18, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Liam Gerard O'Riordan, DO located?
The NPPES record lists a practice address at 301 Prospect Ave, Syracuse, NY, 13203. Phone: (315) 448-5111. Providers update this record themselves, so call before visiting.
How can I verify Liam Gerard O'Riordan, DO's license?
NPPES lists New York license number 311919, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Liam Gerard O'Riordan, DO prescribe under Medicare Part D?
In 2024, Liam Gerard O'Riordan, DO had 289 Medicare Part D claims for 182 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.