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William Mazanitis, MD
NPI 1386644508 · Anesthesiology Physician · Mount Kisco, NY
William Mazanitis, MD is a Anesthesiology Physician provider in Mount Kisco, NY (NPI 1386644508).
Provider details
- NPI number
- 1386644508
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- 150470 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
400 E Main St
Northern Westchester Hospital
Mount Kisco, NY 10549-3417
Phone: (914) 666-1691
Street-level locationGet directions
Mailing address
43 Kensico Dr
Mount Kisco, NY 10549-1009
Registry dates
- Enumerated
- 2005-07-29
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Mazanitis's NPI number?
- William Mazanitis's National Provider Identifier (NPI) is 1386644508, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mazanitis's specialty?
- William Mazanitis is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Mazanitis located?
- William Mazanitis's practice location on file with NPPES is 400 E Main St, Mount Kisco, NY 10549-3417.
- What is William Mazanitis's phone number?
- The practice phone number listed in the NPPES registry for William Mazanitis is (914) 666-1691.
- Is William Mazanitis's NPI active?
- Yes — William Mazanitis's NPI (1386644508) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.