IndividualActive
Mark Etherton
NPI 1023375946 · Neurology Physician · Boston, MA
Mark Etherton is a Neurology Physician provider in Boston, MA (NPI 1023375946).
Provider details
- NPI number
- 1023375946
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 265436 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(80/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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 St
Wacc 720
Boston, MA 02114-2621
Phone: (617) 726-8459
Street-level locationGet directions
Mailing address
55 Fruit St
Boston, MA 02114-2621
Registry dates
- Enumerated
- 2012-04-17
- Last updated
- 2017-01-23
Frequently asked questions
- What is Mark Etherton's NPI number?
- Mark Etherton's National Provider Identifier (NPI) is 1023375946, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Etherton's specialty?
- Mark Etherton is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Etherton located?
- Mark Etherton's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2621.
- What is Mark Etherton's phone number?
- The practice phone number listed in the NPPES registry for Mark Etherton is (617) 726-8459.
- Is Mark Etherton's NPI active?
- Yes — Mark Etherton's NPI (1023375946) is active in the NPPES registry as of the last update on 2017-01-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.