Siobhan Harder, APRN
Family Nurse Practitioner · Essex, CT
Siobhan Harder, APRN is a family nurse practitioner with a practice address in Essex, Connecticut, and NPI 1588032866, issued on Sep 3, 2015. Check the license (Connecticut 6307, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Siobhan Harder
- Credential
- APRN
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 6307 CT
Self-reported in NPPES; status is on the state search - Practice location
- 147 Westbrook RD, Essex, CT 06426
- Phone
- (860) 358-5065
- Enumerated
- Sep 3, 2015
- Record last updated
- Feb 5, 2026
- Fax
- (860) 358-8653
- Medicare enrollment
- Enrolled (PECOS I20151119001135); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 2,669 in Connecticut → Look up another NPI →
Also registered at 147 Westbrook RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ioanna Anastasiadis, PAPhysician Assistant1790858058
- Suzanne Arcuni, APRNFamily Nurse Practitioner1144415514
- Karen Goldfinger, PH.D.Clinical Psychologist1730218223
- Jessica Hansen, PAPhysician Assistant1679646921
- Meredith Lindner, DOInternal Medicine Physician1942616826
- Zoe McGlameryFamily Nurse Practitioner1013304526
Verify Siobhan Harder in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 6307Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average family nurse practitioner in 2024
454 Medicare Part D claims for 215 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Fluticasone Propionate25 claims
- Amoxicillin-Clavulanate Potass22 claims
- Prednisone18 claims
- Azithromycin17 claims
- Cephalexin16 claims
- Doxycycline Hyclate16 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.
2 hospitals and group practices
- Middlesex HospitalMiddletown, CT · Acute Care Hospitals3 of 5 stars
- Mhs Primary Care, Inc.Essex, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Siobhan Harder among 2,669 family nurse practitioner records in Connecticut
Siobhan Harder, APRN is one of 2,669 family nurse practitioner records with a practice address in Connecticut. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 33% of them.
- NPI issued2015 · 33% of these records are older, 63% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2015 · median 2018 among the 1,664 with a school on file
- Record last updated2026 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 family nurse practitioner records list a practice address in Essex
They are 7 of the 208 NPPES records with a practice address in Essex, and 2,669 family nurse practitioner records in Connecticut.
All 2,669 in Connecticut → Every provider in Essex → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Suzanne Arcuni, APRNEssex, CT 064261144415514
- Catherine Demers, APRNEssex, CT 064261487085593
- Lauren Giroux, FNP-CEssex, CT 064261619790219
- Ju Won KimEssex, CT 064261699561159
- Zoe McGlameryEssex, CT 064261013304526
- Sommar OtfinoskiEssex, CT 064261194392605
- Karren AgyekumEast Hampton, CT 064241508296542
- Katie Grigg, APRNEast Hampton, CT 064241467938803
Common questions
What is Siobhan Harder, APRN's NPI number?
Siobhan Harder, APRN's National Provider Identifier (NPI) is 1588032866, issued on Sep 3, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Siobhan Harder, APRN located?
The NPPES record lists a practice address at 147 Westbrook RD, Essex, CT, 06426. Phone: (860) 358-5065. Providers update this record themselves, so call before visiting.
How can I verify Siobhan Harder, APRN's license?
NPPES lists Connecticut license number 6307, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.
How much does Siobhan Harder, APRN prescribe under Medicare Part D?
In 2024, Siobhan Harder, APRN had 454 Medicare Part D claims for 215 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.