Leslie Mastbaum
NPI 1063992964 · Addiction (Substance Use Disorder) Counselor · Lancaster, SC
Leslie Mastbaum is a Addiction (Substance Use Disorder) Counselor provider in Lancaster, SC (NPI 1063992964).
Provider details
- NPI number
- 1063992964
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- 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
7 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
- 2018-08-20
- Last updated
- 2018-08-23
Frequently asked questions
- What is Leslie Mastbaum's NPI number?
- Leslie Mastbaum's National Provider Identifier (NPI) is 1063992964, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leslie Mastbaum's specialty?
- Leslie Mastbaum is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Leslie Mastbaum located?
- Leslie Mastbaum's practice location on file with NPPES is 114 S Main St, Lancaster, SC 29720.
- What is Leslie Mastbaum's phone number?
- The practice phone number listed in the NPPES registry for Leslie Mastbaum is (803) 285-6911.
- Is Leslie Mastbaum's NPI active?
- Yes — Leslie Mastbaum's NPI (1063992964) is active in the NPPES registry as of the last update on 2018-08-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.