Keira Joy O'Reilly, PA
Physician Assistant · Greenwich, CT
Keira Joy O'Reilly, PA is a physician assistant with a practice address in Greenwich, Connecticut, and NPI 1891378873, issued on Apr 28, 2021. Check the license (Connecticut 5376, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Keira Joy O'Reilly
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 5376 CT
Self-reported in NPPES; status is on the state search - Practice location
- 6 Greenwich Office Park, Greenwich, CT 06831
- Phone
- (203) 869-1145
- Enumerated
- Apr 28, 2021
- Record last updated
- Sep 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210927001907); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 2,047 in Connecticut → Look up another NPI →
Also registered at 6 Greenwich Office Park
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Keira Joy O'Reilly in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 5376Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average physician assistant in 2024
133 Medicare Part D claims for 59 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol17 claims
- Clobetasol Propionate14 claims
- Clotrimazole-Betamethasone14 claims
- Fluconazole11 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 practice group's MIPS final score for 2023 (Medicare payment program): 89.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $678.31
21 payments; by number, the most common kind was food and beverage; the largest payer was Exeltis, USA Inc. The 64,719 providers of this specialty with any payment received $841.65 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
- Physicians For Women's Health, LLCDanbury, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Keira Joy O'Reilly among 2,047 physician assistant records in Connecticut
Keira Joy O'Reilly, PA is one of 2,047 physician assistant records with a practice address in Connecticut. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 65% of them.
- NPI issued2021 · 65% of these records are older, 29% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2021 · median 2018 among the 1,338 with a school on file
- Record last updated2021 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
35 physician assistant records list a practice address in Greenwich
They are 35 of the 1,184 NPPES records with a practice address in Greenwich, and 2,047 physician assistant records in Connecticut.
All 2,047 in Connecticut → Every provider in Greenwich → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Carlye Bianco, PA-CGreenwich, CT 068311134645211
- Joanie Bradshaw, P.A.Greenwich, CT 068311538393194
- Haley Fox, PA-CGreenwich, CT 068311124865050
- Justine LegowskiGreenwich, CT 068311164106076
- Peter LjuljdjurovicGreenwich, CT 068311336099209
- Kaitlyn Milchman, PA-CGreenwich, CT 068311174945901
- Elena Novakova, P.A.Greenwich, CT 068311245202803
- Nicole Porter, PA-CGreenwich, CT 068311437552064
Common questions
What is Keira Joy O'Reilly, PA's NPI number?
Keira Joy O'Reilly, PA's National Provider Identifier (NPI) is 1891378873, issued on Apr 28, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Keira Joy O'Reilly, PA located?
The NPPES record lists a practice address at 6 Greenwich Office Park, Greenwich, CT, 06831. Phone: (203) 869-1145. Providers update this record themselves, so call before visiting.
How can I verify Keira Joy O'Reilly, PA's license?
NPPES lists Connecticut license number 5376, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.
How much does Keira Joy O'Reilly, PA prescribe under Medicare Part D?
In 2024, Keira Joy O'Reilly, PA had 133 Medicare Part D claims for 59 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Keira Joy O'Reilly, PA's MIPS final score?
The 2023 MIPS final score is 89.9 of 100, reported for the practice group. 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.