Mary Drennan, LCSW-C
NPI 1174756761 · Clinical Social Worker · Randallstown, MD
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Drennan, LCSW-C is a Clinical Social Worker provider in Randallstown, MD (NPI 1174756761).
Provider details
- NPI number
- 1174756761
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW-C
- Sex
- Female
- Sole proprietor
- No
- License
- 09078 (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
16 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
- 2009-08-28
- Last updated
- 2021-08-16
- Certified
- 2021-08-16
Frequently asked questions
- What is Mary Drennan's NPI number?
- Mary Drennan's National Provider Identifier (NPI) is 1174756761, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Drennan's specialty?
- Mary Drennan is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary Drennan located?
- Mary Drennan's practice location on file with NPPES is 3510 Brenbrook Dr, Randallstown, MD 21133-4902.
- What is Mary Drennan's phone number?
- The practice phone number listed in the NPPES registry for Mary Drennan is (410) 837-2050.
- Does Mary Drennan accept Medicare?
- Mary Drennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Drennan's NPI active?
- Yes — Mary Drennan's NPI (1174756761) is active in the NPPES registry as of the last update on 2021-08-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.