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Justin Lowenthal, MD, PHD
NPI 1891185617 · Internal Medicine Physician · Boston, MA
Justin Lowenthal, MD, PHD is a Internal Medicine Physician provider in Boston, MA (NPI 1891185617).
Provider details
- NPI number
- 1891185617
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 3014263 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Established profile(74/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 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
75 Francis St
Boston, MA 02115-6106
Phone: (617) 732-5775
Street-level locationGet directions
Mailing address
75 Francis St
Boston, MA 02115-6106
Registry dates
- Enumerated
- 2015-02-01
- Last updated
- 2026-03-21
- Certified
- 2026-03-21
Frequently asked questions
- What is Justin Lowenthal's NPI number?
- Justin Lowenthal's National Provider Identifier (NPI) is 1891185617, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Justin Lowenthal's specialty?
- Justin Lowenthal is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Justin Lowenthal located?
- Justin Lowenthal's practice location on file with NPPES is 75 Francis St, Boston, MA 02115-6106.
- What is Justin Lowenthal's phone number?
- The practice phone number listed in the NPPES registry for Justin Lowenthal is (617) 732-5775.
- Is Justin Lowenthal's NPI active?
- Yes — Justin Lowenthal's NPI (1891185617) is active in the NPPES registry as of the last update on 2026-03-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.