Michelle Karen Zywica-Harrigan, PA-C
Medical Physician Assistant · New Haven, CT
Michelle Karen Zywica-Harrigan, PA-C is a medical physician assistant with a practice address in New Haven, Connecticut, and NPI 1134470735, issued on Sep 24, 2012. Check the license (Connecticut 3184, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michelle Karen Zywica-Harrigan
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- 3184 CT
Self-reported in NPPES; status is on the state search - Practice location
- 20 York Street, CB-2041, New Haven, CT 06510
- Phone
- (203) 688-4748
- Enumerated
- Sep 24, 2012
- Record last updated
- Feb 8, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (203) 688-4740
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 1,138 in Connecticut → Look up another NPI →
Also registered at 20 York Street, CB-2041
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michelle Karen Zywica-Harrigan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 3184Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average medical physician assistant in 2024
263 Medicare Part D claims for 85 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Metoprolol Succinate30 claims
- Furosemide26 claims
- Eliquis20 claims
- Entresto17 claims
- Spironolactone16 claims
- Torsemide14 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.
Michelle Karen Zywica-Harrigan among 1,138 medical physician assistant records in Connecticut
Michelle Karen Zywica-Harrigan, PA-C is one of 1,138 medical physician assistant records with a practice address in Connecticut. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 45% of them.
- NPI issued2012 · 45% of these records are older, 52% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2020 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
248 medical physician assistant records list a practice address in New Haven
They are 248 of the 9,793 NPPES records with a practice address in New Haven, and 1,138 medical physician assistant records in Connecticut.
All 1,138 in Connecticut → Every provider in New Haven → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Daniel Cervonka, PA-C, MPAS, CASNew Haven, CT 065101932125036
- Ryan Donovan, PA-CNew Haven, CT 065101881650364
- Douglas Eldred, PA-CNew Haven, CT 065101033153093
- Katherine Flaherty, PA-CNew Haven, CT 065101356363899
- Tracy Gambardella, PA-CNew Haven, CT 065101760513014
- Christine Haley, PANew Haven, CT 065101902913445
- Tonia McGowan, PANew Haven, CT 065101447391842
- Shilpa Mistry, PANew Haven, CT 065101407951122
Common questions
What is Michelle Karen Zywica-Harrigan, PA-C's NPI number?
Michelle Karen Zywica-Harrigan, PA-C's National Provider Identifier (NPI) is 1134470735, issued on Sep 24, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Michelle Karen Zywica-Harrigan, PA-C located?
The NPPES record lists a practice address at 20 York Street, CB-2041, New Haven, CT, 06510. Phone: (203) 688-4748. Providers update this record themselves, so call before visiting.
How can I verify Michelle Karen Zywica-Harrigan, PA-C's license?
NPPES lists Connecticut license number 3184, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.
How much does Michelle Karen Zywica-Harrigan, PA-C prescribe under Medicare Part D?
In 2024, Michelle Karen Zywica-Harrigan, PA-C had 263 Medicare Part D claims for 85 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.