Mary Ellen Cassidy, PA
NPI 1114101615 · Physician Assistant · Great Neck, NY
Mary Ellen Cassidy, PA is a Physician Assistant provider in Great Neck, NY (NPI 1114101615).
Provider details
- NPI number
- 1114101615
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- 002298 (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
18 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
- 2007-12-20
- Last updated
- 2009-11-12
Frequently asked questions
- What is Mary Ellen Cassidy's NPI number?
- Mary Ellen Cassidy's National Provider Identifier (NPI) is 1114101615, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Ellen Cassidy's specialty?
- Mary Ellen Cassidy is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Ellen Cassidy located?
- Mary Ellen Cassidy's practice location on file with NPPES is 935 Northern Blvd, Great Neck, NY 11021-5316.
- What is Mary Ellen Cassidy's phone number?
- The practice phone number listed in the NPPES registry for Mary Ellen Cassidy is (516) 466-9062.
- Is Mary Ellen Cassidy's NPI active?
- Yes — Mary Ellen Cassidy's NPI (1114101615) is active in the NPPES registry as of the last update on 2009-11-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.