Matthew S. Loewenstein, MD
NPI 1750598652 · Gastroenterology Physician · Cambridge, MA
Matthew S. Loewenstein, MD is a Gastroenterology Physician organization in Cambridge, MA (NPI 1750598652).
Provider details
- NPI number
- 1750598652
- Entity type
- Organization
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Valentine Garabedian, Office Manager(617) 876-5674
- 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
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
Other names (DBA / former)
- Doing business as
- Cambridge Gastroenterology Associates
Registry dates
- Enumerated
- 2007-05-17
- Last updated
- 2020-08-22
Frequently asked questions
- What is Matthew S. Loewenstein, MD's NPI number?
- Matthew S. Loewenstein, MD's National Provider Identifier (NPI) is 1750598652, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Matthew S. Loewenstein, MD?
- Matthew S. Loewenstein, MD is classified in the NPPES registry as Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew S. Loewenstein, MD located?
- Matthew S. Loewenstein, MD's practice location on file with NPPES is 300 Mount Auburn St, Cambridge, MA 02138-5600.
- What is Matthew S. Loewenstein, MD's phone number?
- The practice phone number listed in the NPPES registry for Matthew S. Loewenstein, MD is (617) 876-5674.
- Who is the authorized official for Matthew S. Loewenstein, MD?
- The authorized official listed on Matthew S. Loewenstein, MD's NPPES record is Valentine Garabedian, Office Manager. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Matthew S. Loewenstein, MD's NPI active?
- Yes — Matthew S. Loewenstein, MD's NPI (1750598652) is active in the NPPES registry as of the last update on 2020-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.