SIOBHAN HARDER APRN
NPI 1588032866
Nurse Practitioner - Family in Essex, CT
About Siobhan Harder Aprn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SIOBHAN HARDER APRN (NPI 1588032866) is an individual family provider in Essex, Connecticut, licensed in Connecticut (6307) and active in the NPI registry since September 2015. She is enrolled in Medicare PECOS and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Siobhan Harder Aprn is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Siobhan Harder reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Essex, CT 06426
- Reassigned Medicare billing, Connecticut enrollment
- 147 clinicians in this Medicare group
Middletown, CT 06457
- Reassigned Medicare billing, Connecticut enrollment
- 178 clinicians in this Medicare group
Hartford, CT 06105
- Reassigned Medicare billing, Connecticut enrollment
- 1,186 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06426 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 14
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Siobhan Harder's NPI number?
The NPI number for Siobhan Harder is 1588032866. It was assigned to this individual provider in the NPPES registry on September 3, 2015.
Where is Siobhan Harder located?
Siobhan Harder practices at 147 Westbrook Rd, Essex, CT 06426. The listed phone number is (860) 358-5065.
What is Siobhan Harder's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Siobhan Harder enrolled in Medicare?
Yes. Siobhan Harder is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Siobhan Harder's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Siobhan Harder reassigns Medicare benefits to 3 organizations: Mhs Primary Care (Essex, CT), Middlesex Hospital (Middletown, CT) and Trinity Health Of New England Provider Network Organization Inc (Hartford, CT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Siobhan Harder's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Siobhan Harder accept?
Health plans from Anthem Blue Cross and Blue Shield list Siobhan Harder as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Siobhan Harder was last updated on February 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Siobhan Harder, APRN · NPI 1588032866
Family physician in Essex, Connecticut. Individual provider, active in the CMS NPPES registry since September 3, 2015.
## Identity
- **NPI:** 1588032866 (Entity type: Individual)
- **Enumerated:** September 3, 2015
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 6307 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 147 WESTBROOK RD, Essex, CT 06426-1512
- **Phone:** (860) 358-5065 · **Fax:** (860) 358-8653
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Mhs Primary Care (NPI 1992922892, Essex, CT); Middlesex Hospital (NPI 1972563138, Middletown, CT); Trinity Health Of New England Provider Network Organization Inc (NPI 1003882812, Hartford, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** February 5, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1588032866) · Data from the CMS NPPES public registry.