M. Jennifer Demarco D.O., LLC
NPI 1588749535 · Family Medicine Physician · Amityville, NY
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
M. Jennifer Demarco D.O., LLC is a Family Medicine Physician organization in Amityville, NY (NPI 1588749535).
Provider details
- NPI number
- 1588749535
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mary Demarco, Doctor(631) 598-2318
- License
- 219063 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2006-10-26
- Last updated
- 2007-10-01
Frequently asked questions
- What is M. Jennifer Demarco D.O., LLC's NPI number?
- M. Jennifer Demarco D.O., LLC's National Provider Identifier (NPI) is 1588749535, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is M. Jennifer Demarco D.O., LLC?
- M. Jennifer Demarco D.O., LLC is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is M. Jennifer Demarco D.O., LLC located?
- M. Jennifer Demarco D.O., LLC's practice location on file with NPPES is 191 Grand Central Ave, Amityville, NY 11701-3706.
- What is M. Jennifer Demarco D.O., LLC's phone number?
- The practice phone number listed in the NPPES registry for M. Jennifer Demarco D.O., LLC is (631) 598-2318.
- Does M. Jennifer Demarco D.O., LLC accept Medicare?
- M. Jennifer Demarco D.O., LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for M. Jennifer Demarco D.O., LLC?
- The authorized official listed on M. Jennifer Demarco D.O., LLC's NPPES record is Mary Demarco, Doctor. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is M. Jennifer Demarco D.O., LLC's NPI active?
- Yes — M. Jennifer Demarco D.O., LLC's NPI (1588749535) is active in the NPPES registry as of the last update on 2007-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.