Alan Markowitz, MD
NPI 1326039371 · Internal Medicine Physician · Hewlett, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alan Markowitz, MD is a Internal Medicine Physician provider in Hewlett, NY (NPI 1326039371).
Provider details
- NPI number
- 1326039371
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 086656 (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
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
Mailing address
Registry dates
- Enumerated
- 2005-10-31
- Last updated
- 2008-05-30
Frequently asked questions
- What is Alan Markowitz's NPI number?
- Alan Markowitz's National Provider Identifier (NPI) is 1326039371, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alan Markowitz's specialty?
- Alan Markowitz is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alan Markowitz located?
- Alan Markowitz's practice location on file with NPPES is 1553 Broadway, Hewlett, NY 11557-1427.
- What is Alan Markowitz's phone number?
- The practice phone number listed in the NPPES registry for Alan Markowitz is (516) 374-1677.
- Does Alan Markowitz accept Medicare?
- Alan Markowitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alan Markowitz's NPI active?
- Yes — Alan Markowitz's NPI (1326039371) is active in the NPPES registry as of the last update on 2008-05-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.