IndividualActive
Alyssa Johnsen, MD
NPI 1326051368 · Internal Medicine Physician · Cambridge, MA
Alyssa Johnsen, MD is a Internal Medicine Physician provider in Cambridge, MA (NPI 1326051368).
Provider details
- NPI number
- 1326051368
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 219263 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
75 Mount Auburn St
Cambridge, MA 02138-4960
Phone: (617) 496-9506
Street-level locationGet directions
Mailing address
75 Mount Auburn St
Cambridge, MA 02138-4960
Registry dates
- Enumerated
- 2006-08-14
- Last updated
- 2007-11-06
Frequently asked questions
- What is Alyssa Johnsen's NPI number?
- Alyssa Johnsen's National Provider Identifier (NPI) is 1326051368, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alyssa Johnsen's specialty?
- Alyssa Johnsen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alyssa Johnsen located?
- Alyssa Johnsen's practice location on file with NPPES is 75 Mount Auburn St, Cambridge, MA 02138-4960.
- What is Alyssa Johnsen's phone number?
- The practice phone number listed in the NPPES registry for Alyssa Johnsen is (617) 496-9506.
- Is Alyssa Johnsen's NPI active?
- Yes — Alyssa Johnsen's NPI (1326051368) is active in the NPPES registry as of the last update on 2007-11-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.