Bonnie McGuire Wreschner, MD
Emergency Medicine Physician · Greenwich, CT
Bonnie McGuire Wreschner, MD is an emergency medicine physician with a practice address in Greenwich, Connecticut, and NPI 1871789834, issued on Sep 24, 2007. Check the license (Connecticut 48258, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Bonnie McGuire Wreschner
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 48258 CT
Self-reported in NPPES; status is on the state search - Practice location
- 5 Perryridge Road, Greenwich, CT 06830
- Phone
- (973) 971-7926
- Enumerated
- Sep 24, 2007
- Record last updated
- Aug 20, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100901000788); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 2007
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 846 in Connecticut → Look up another NPI →
Also registered at 5 Perryridge Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anne Ambrosio, LCSWSocial Worker1275647984
- Kyra Beckman, MDStudent in an Organized Health Care Education/Training Program1174325294
- Roberta Brown Brugo, R.N., L.M.T.,HTCPRegistered Nurse1700019726
- Eunna Cho, DOHospitalist Physician1417485277
- Richard Fagbemigun, M.D.Student in an Organized Health Care Education/Training Program1679359129
- Miriam KahnNurse Practitioner1992813083
Verify Bonnie McGuire Wreschner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 48258Check 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 emergency medicine physician in 2024
36 Medicare Part D claims for 32 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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): 70.2 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).
Bills Medicare through one group practice
- Greenwich HospitalGreenwich, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Bonnie McGuire Wreschner among 846 emergency medicine physician records in Connecticut
Bonnie McGuire Wreschner, MD is one of 846 emergency medicine physician records with a practice address in Connecticut. 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 2007, is newer than 35% of them.
- NPI issued2007 · 35% of these records are older, 53% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2007 · median 2011 among the 574 with a school on file
- Record last updated2018 · 57% 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 Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Connecticut
There are 846 emergency medicine physician records in Connecticut.
All 846 in Connecticut → Every provider in Greenwich → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Maria Brea, M.D.Greenwich, CT 068301508809161
- J. Allen Britvan, M.DGreenwich, CT 068301376566042
- Michael Canter, M.D.Greenwich, CT 068301558381483
- Ryan Casarella, M.D.Greenwich, CT 068301740643998
- Robert Chang, MDGreenwich, CT 068301760581672
- Christopher Davison, M.D.Greenwich, CT 068301225051857
- Servando De Los Angeles, M.D.Greenwich, CT 068301831119619
- Stacey Donegan, M.D.Greenwich, CT 068301174546709
Common questions
What is Bonnie McGuire Wreschner, MD's NPI number?
Bonnie McGuire Wreschner, MD's National Provider Identifier (NPI) is 1871789834, issued on Sep 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Bonnie McGuire Wreschner, MD located?
The NPPES record lists a practice address at 5 Perryridge Road, Greenwich, CT, 06830. Phone: (973) 971-7926. Providers update this record themselves, so call before visiting.
How can I verify Bonnie McGuire Wreschner, MD's license?
NPPES lists Connecticut license number 48258, 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 Bonnie McGuire Wreschner, MD prescribe under Medicare Part D?
In 2024, Bonnie McGuire Wreschner, MD had 36 Medicare Part D claims for 32 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Bonnie McGuire Wreschner, MD's MIPS final score?
The 2023 MIPS final score is 70.2 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.