Siobhan Cassidy, N.P.
NPI 1073521464 · Neonatal Nurse Practitioner · Stony Brook, NY
Siobhan Cassidy, N.P. is a Neonatal Nurse Practitioner provider in Stony Brook, NY (NPI 1073521464).
Provider details
- NPI number
- 1073521464
- Entity type
- Individual
- Primary specialty
- Neonatal Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- N.P.
- Sex
- Female
- Sole proprietor
- No
- License
- F350168-1 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-03
- Last updated
- 2009-11-04
Frequently asked questions
- What is Siobhan Cassidy's NPI number?
- Siobhan Cassidy's National Provider Identifier (NPI) is 1073521464, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Siobhan Cassidy's specialty?
- Siobhan Cassidy is listed in the NPPES registry with a primary specialty of Neonatal Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Siobhan Cassidy located?
- Siobhan Cassidy's practice location on file with NPPES is L8 University Hospital, Stony Brook, NY 11794-0001.
- What is Siobhan Cassidy's phone number?
- The practice phone number listed in the NPPES registry for Siobhan Cassidy is (631) 444-7653.
- Is Siobhan Cassidy's NPI active?
- Yes — Siobhan Cassidy's NPI (1073521464) is active in the NPPES registry as of the last update on 2009-11-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.