Gwendolyn Blacknall, LGADC
NPI 1275171217 · Addiction (Substance Use Disorder) Counselor · Prince Frederick, MD
Gwendolyn Blacknall, LGADC is a Addiction (Substance Use Disorder) Counselor provider in Prince Frederick, MD (NPI 1275171217).
Provider details
- NPI number
- 1275171217
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- LGADC
- Sex
- Female
- Sole proprietor
- No
- License
- LGA2466 (MD)
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
6 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
Mailing address
Registry dates
- Enumerated
- 2019-12-19
- Last updated
- 2019-12-19
- Certified
- 2019-12-19
Frequently asked questions
- What is Gwendolyn Blacknall's NPI number?
- Gwendolyn Blacknall's National Provider Identifier (NPI) is 1275171217, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gwendolyn Blacknall's specialty?
- Gwendolyn Blacknall is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Gwendolyn Blacknall located?
- Gwendolyn Blacknall's practice location on file with NPPES is 65 Duke St Ste 203, Prince Frederick, MD 20678-6128.
- What is Gwendolyn Blacknall's phone number?
- The practice phone number listed in the NPPES registry for Gwendolyn Blacknall is (443) 824-4818.
- Is Gwendolyn Blacknall's NPI active?
- Yes — Gwendolyn Blacknall's NPI (1275171217) is active in the NPPES registry as of the last update on 2019-12-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.