What is Catherine Day's NPI number?

Catherine Day's National Provider Identifier (NPI) is 1386218394, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Catherine Day's specialty?

Catherine Day is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).

Where is Catherine Day located?

Catherine Day's practice location on file with NPPES is 336 Harrison Ave, Massapequa, NY 11758-6405.

What is Catherine Day's phone number?

The practice phone number listed in the NPPES registry for Catherine Day is (516) 578-8280.

Is Catherine Day's NPI active?

Yes — Catherine Day's NPI (1386218394) is active in the NPPES registry as of the last update on 2021-05-14.

IndividualActive

Catherine Day

NPI 1386218394 · Specialist · Massapequa, NY

Catherine Day is a Specialist provider in Massapequa, NY (NPI 1386218394).

Provider details

NPI number: 1386218394
Entity type: Individual
Primary specialty: SpecialistOther Service Providers
Sex: Female
Sole proprietor: No

Specialties & taxonomies

SpecialistPrimary174400000X
Other Service Providers

Profile Score

Established profile(56/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
5 yrs in NPPES registry
Profile completeness38% of score
83% 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

336 Harrison Ave

Massapequa, NY 11758-6405

Phone: (516) 578-8280

Street-level locationGet directions

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Mailing address