Doctor profile · Federal record
Dr. Mary Drennan, LCSW-C
Clinical Social Worker · Randallstown, MD
- NPI 1174756761
- Accepts Medicare
- 46 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3510 Brenbrook Dr
Randallstown, MD 211334902
(410) 837-2050
fax (866) 629-0091 - Mailing address
-
1111 N Charles St
Baltimore, MD 212015505
Credentials & registration
- NPI registered
- August 2009 — 17 yrs on file
- Profile last updated
- August 16, 2021
- Year of graduation
- 1980 — 46 yrs since
- Specialty taxonomy
- 1041C0700X — NUCC code
- State license (1)
- Maryland #09078
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1174756761. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
106
Distinct HCPCS
2
Medicare allowed
$9,392
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
90834 |
Psychotherapy, 45 minutes | 85 | 24 | $77 | |
90791 |
Psychiatric diagnostic evaluation | 21 | 20 | $135 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 82. This provider delivers 1.3× the peer median.Frequently asked questions
What is Dr. Mary Drennan's medical specialty?
Dr. Mary Drennan practices Clinical Social Worker in Randallstown, MD.
Where does Dr. Mary Drennan practice?
Dr. Mary Drennan practices at 3510 Brenbrook Dr, Randallstown, MD 211334902. Office phone: 4108372050.
What is Dr. Mary Drennan's NPI?
Dr. Mary Drennan's National Provider Identifier (NPI) is 1174756761, issued by NPPES.
Does Dr. Mary Drennan accept Medicare assignment?
Yes. Dr. Mary Drennan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mary Drennan commonly perform?
Top Medicare-reported procedures in 2023: Psychotherapy (HCPCS 90834); Psychiatric diagnostic evaluation (HCPCS 90791). Source: CMS Medicare Physician & Other Practitioners file.