Matthew Loewenstein, MD
NPI 1215904982 · Gastroenterology Physician · Cambridge, MA
Matthew Loewenstein, MD is a Gastroenterology Physician provider in Cambridge, MA (NPI 1215904982).
Provider details
- NPI number
- 1215904982
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- 35973 (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
- 2006-03-02
- Last updated
- 2007-07-08
Frequently asked questions
- What is Matthew Loewenstein's NPI number?
- Matthew Loewenstein's National Provider Identifier (NPI) is 1215904982, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Loewenstein's specialty?
- Matthew Loewenstein is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Loewenstein located?
- Matthew Loewenstein's practice location on file with NPPES is 300 Mt Auburn St, Cambridge, MA 02238.
- What is Matthew Loewenstein's phone number?
- The practice phone number listed in the NPPES registry for Matthew Loewenstein is (617) 876-5674.
- Is Matthew Loewenstein's NPI active?
- Yes — Matthew Loewenstein's NPI (1215904982) 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.