John Isaiah Oreilly, M.D.
Infectious Disease Physician · Las Vegas, NV
John Isaiah Oreilly, M.D. is an infectious disease physician with a practice address in Las Vegas, Nevada, and NPI 1356579155, issued on Jun 30, 2009. Check the license (Nevada 21365, as entered in NPPES) on the Nevada State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Isaiah Oreilly
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 21365 NV
Self-reported in NPPES; status is on the state search - Practice location
- 2435 Fire Mesa St Ste 120, Las Vegas, NV 89128
- Phone
- (702) 968-2437
- Enumerated
- Jun 30, 2009
- Record last updated
- Sep 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (702) 479-1796
- Medicare enrollment
- Enrolled (PECOS I20210927001356); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 64 in Nevada → Look up another NPI →
Also registered at 2435 Fire Mesa St Ste 120
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Chemanthi Kalen, MDFamily Medicine Physician1568950855
- Megan Luna, PAMedical Physician Assistant1760071773
- Tienchai Narach, MDInfectious Disease Physician1700036431
- Angeline PrabhuInfectious Disease Physician1245645878
Verify John Isaiah Oreilly in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNevada State Board of Medical Examiners
Search for license 21365Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% fewer Medicare Part D claims than the average infectious disease physician in 2024
590 Medicare Part D claims for 129 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Ertapenem56 claims
- Ceftriaxone55 claims
- Daptomycin49 claims
- Meropenem34 claims
- Cefazolin Sodium31 claims
- Ethambutol Hcl30 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.
Industry payments in 2024: $1,191.46
37 payments; by number, the most common kind was food and beverage; the largest payer was ViiV Healthcare Company. The 3,895 providers of this specialty with any payment received $4,362.19 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
- Babak Hooshmand MD PLLCLas Vegas, NV
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Isaiah Oreilly among 64 infectious disease physician records in Nevada
John Isaiah Oreilly, M.D. is one of 64 infectious disease physician records with a practice address in Nevada. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 52% of them.
- NPI issued2009 · 52% of these records are older, 44% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated2016 · median 2004 among the 53 with a school on file
- Record last updated2021 · 33% 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 Nevada 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 Nevada
There are 64 infectious disease physician records in Nevada.
All 64 in Nevada → Every provider in Las Vegas → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Ricardo Cedeno-Mendoza, MDLas Vegas, NV 891281194201426
- Tienchai Narach, MDLas Vegas, NV 891281700036431
- Angeline PrabhuLas Vegas, NV 891281245645878
- Dhaval Shah, M.D.Las Vegas, NV 891281194711358
- Gary Skankey, M.D.Las Vegas, NV 891281952386468
- Kathleen Wairimu, M.D.Las Vegas, NV 891291023065422
- Li-Chien Chen, D.OLas Vegas, NV 891191528492949
- Cara Fanning, MDLas Vegas, NV 891191841288107
Common questions
What is John Isaiah Oreilly, M.D.'s NPI number?
John Isaiah Oreilly, M.D.'s National Provider Identifier (NPI) is 1356579155, issued on Jun 30, 2009. An NPI identifies a provider in billing; it is not a license.
Where is John Isaiah Oreilly, M.D. located?
The NPPES record lists a practice address at 2435 Fire Mesa St Ste 120, Las Vegas, NV, 89128. Phone: (702) 968-2437. Providers update this record themselves, so call before visiting.
How can I verify John Isaiah Oreilly, M.D.'s license?
NPPES lists Nevada license number 21365, as entered by the provider. Search the Nevada State Board of Medical Examiners at https://medboard.nv.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Isaiah Oreilly, M.D. prescribe under Medicare Part D?
In 2024, John Isaiah Oreilly, M.D. had 590 Medicare Part D claims for 129 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.