IndividualActive
Charles De Guzman, MD
NPI 1134878705 · Internal Medicine Physician · Boston, MA
Provider details
- NPI number
- 1134878705
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 1022888 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
Established profile(65/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
55 Fruit St
Boston, MA 02114-2621
Phone: (617) 724-3874
Street-level locationGet directions
Mailing address
1493 Cambridge St
Cambridge, MA 02139-1047
Additional practice locations (1)
- 1493 Cambridge StCambridge, MA 02139-1047Phone: (617) 665-1000
Registry dates
- Enumerated
- 2022-03-21
- Last updated
- 2026-03-20
- Certified
- 2026-03-20
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.