Mark Alexander, MD
NPI 1144433996 · Internal Medicine Physician · White Plains, NY
Mark Alexander, MD is a Internal Medicine Physician provider in White Plains, NY (NPI 1144433996).
Provider details
- NPI number
- 1144433996
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 148692 (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
- 2007-05-08
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Alexander's NPI number?
- Mark Alexander's National Provider Identifier (NPI) is 1144433996, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Alexander's specialty?
- Mark Alexander is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Alexander located?
- Mark Alexander's practice location on file with NPPES is 25 Rockledge Ave Ph 16, White Plains, NY 10601-1200.
- What is Mark Alexander's phone number?
- The practice phone number listed in the NPPES registry for Mark Alexander is (914) 683-0805.
- Is Mark Alexander's NPI active?
- Yes — Mark Alexander's NPI (1144433996) 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.