Alexander Hay, MD
NPI 1740083161 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Hay, MD is a Internal Medicine Physician provider in Boston, MA (NPI 1740083161).
Provider details
- NPI number
- 1740083161
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 3018982 (MA)
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
1 yr 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
- 2025-03-31
- Last updated
- 2025-05-22
- Certified
- 2025-05-22
Frequently asked questions
- What is Alexander Hay's NPI number?
- Alexander Hay's National Provider Identifier (NPI) is 1740083161, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Hay's specialty?
- Alexander Hay is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Hay located?
- Alexander Hay's practice location on file with NPPES is 800 Washington St, Boston, MA 02111-1552.
- What is Alexander Hay's phone number?
- The practice phone number listed in the NPPES registry for Alexander Hay is (617) 636-5000.
- Does Alexander Hay accept Medicare?
- Alexander Hay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Hay's NPI active?
- Yes — Alexander Hay's NPI (1740083161) is active in the NPPES registry as of the last update on 2025-05-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.