Gerald Kassels, M.D.
NPI 1093797599 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gerald Kassels, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1093797599).
Provider details
- NPI number
- 1093797599
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- 36953 (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
- 2005-11-18
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gerald Kassels's NPI number?
- Gerald Kassels's National Provider Identifier (NPI) is 1093797599, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerald Kassels's specialty?
- Gerald Kassels is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gerald Kassels located?
- Gerald Kassels's practice location on file with NPPES is 125 Nashua St, Boston, MA 02114-1101.
- What is Gerald Kassels's phone number?
- The practice phone number listed in the NPPES registry for Gerald Kassels is (616) 573-7110.
- Does Gerald Kassels accept Medicare?
- Gerald Kassels is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gerald Kassels's NPI active?
- Yes — Gerald Kassels's NPI (1093797599) 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.