Michael Apstein, MD
NPI 1609854603 · Gastroenterology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Apstein, MD is a Gastroenterology Physician provider in Boston, MA (NPI 1609854603).
Provider details
- NPI number
- 1609854603
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 35625 (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
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
- 2006-01-09
- Last updated
- 2007-09-06
Frequently asked questions
- What is Michael Apstein's NPI number?
- Michael Apstein's National Provider Identifier (NPI) is 1609854603, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Apstein's specialty?
- Michael Apstein is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Apstein located?
- Michael Apstein's practice location on file with NPPES is 110 Francis St, Boston, MA 02215-5501.
- What is Michael Apstein's phone number?
- The practice phone number listed in the NPPES registry for Michael Apstein is (617) 632-8289.
- Does Michael Apstein accept Medicare?
- Michael Apstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Apstein's NPI active?
- Yes — Michael Apstein's NPI (1609854603) is active in the NPPES registry as of the last update on 2007-09-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.