Cynthia Longjohn, MD
NPI 1518454610 · Pediatrics Physician · Medford, NY
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cynthia Longjohn, MD is a Pediatrics Physician provider in Medford, NY (NPI 1518454610).
Provider details
- NPI number
- 1518454610
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 310312 (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
8 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
- 2018-04-16
- Last updated
- 2021-10-06
- Certified
- 2021-10-06
Frequently asked questions
- What is Cynthia Longjohn's NPI number?
- Cynthia Longjohn's National Provider Identifier (NPI) is 1518454610, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cynthia Longjohn's specialty?
- Cynthia Longjohn is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Cynthia Longjohn located?
- Cynthia Longjohn's practice location on file with NPPES is 2799 Route 112 Ste 11, Medford, NY 11763-2535.
- What is Cynthia Longjohn's phone number?
- The practice phone number listed in the NPPES registry for Cynthia Longjohn is (631) 732-5222.
- Does Cynthia Longjohn accept Medicare?
- Cynthia Longjohn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cynthia Longjohn's NPI active?
- Yes — Cynthia Longjohn's NPI (1518454610) is active in the NPPES registry as of the last update on 2021-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.