Keith Marks, MA
NPI 1801123336 · Addiction (Substance Use Disorder) Counselor · Boston, MA
Keith Marks, MA is a Addiction (Substance Use Disorder) Counselor provider in Boston, MA (NPI 1801123336).
Provider details
- NPI number
- 1801123336
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- MA
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2009-11-04
- Last updated
- 2009-11-04
Frequently asked questions
- What is Keith Marks's NPI number?
- Keith Marks's National Provider Identifier (NPI) is 1801123336, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Keith Marks's specialty?
- Keith Marks is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Keith Marks located?
- Keith Marks's practice location on file with NPPES is 66 Canal St, Boston, MA 02114-2002.
- What is Keith Marks's phone number?
- The practice phone number listed in the NPPES registry for Keith Marks is (617) 371-3030.
- Is Keith Marks's NPI active?
- Yes — Keith Marks's NPI (1801123336) is active in the NPPES registry as of the last update on 2009-11-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.