IndividualActive
Johnathan Mack, M.D.
NPI 1972982650 · Blood Banking & Transfusion Medicine Physician · Boston, MA
Provider details
- NPI number
- 1972982650
- Entity type
- Individual
- Primary specialty
- Blood Banking & Transfusion Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 267360 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
55 Fruit Street
Massachusetts General Hospital, Blood Bank, Grj-238
Boston, MA 02114
Phone: (617) 726-3785
Street-level locationGet directions
Mailing address
55 Fruit Street
Boston, MA 02114-2621
Registry dates
- Enumerated
- 2015-05-27
- Last updated
- 2016-09-08
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.