William Karalis, DO
NPI 1891435731 · Emergency Medicine Physician · Manhasset, NY
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Karalis, DO is a Emergency Medicine Physician provider in Manhasset, NY (NPI 1891435731).
Provider details
- NPI number
- 1891435731
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 335875 (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
4 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
- 2022-03-30
- Last updated
- 2025-08-13
- Certified
- 2025-08-13
Frequently asked questions
- What is William Karalis's NPI number?
- William Karalis's National Provider Identifier (NPI) is 1891435731, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Karalis's specialty?
- William Karalis is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Karalis located?
- William Karalis's practice location on file with NPPES is 300 Community Dr, Manhasset, NY 11030-3816.
- What is William Karalis's phone number?
- The practice phone number listed in the NPPES registry for William Karalis is (516) 562-3047.
- Does William Karalis accept Medicare?
- William Karalis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Karalis's NPI active?
- Yes — William Karalis's NPI (1891435731) is active in the NPPES registry as of the last update on 2025-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.