Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John P O'Brien, LCSW-C

Individual provider Clinical Social Worker · NPI 1700137940

John P O'Brien, LCSW-C is a Clinical Social Worker in Frederick, Maryland. Qualified in 2002, 24 years ago. Accepts Medicare assignment. Licensed in Maryland.

Years since qualifying
24
Licensed in
MD
In the registry since
2012

Practice location Address checks out

198 Thomas Johnson Dr Ste 9
Frederick, MD 21702-4443
Phone: (301) 208-8900
Fax: (301) 208-8369
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 14829 (MD)

Record details

NPI number1700137940
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW-C
Sole proprietorNo
NPI enumeratedSeptember 27, 2012
Last updated in NPPESSeptember 7, 2017

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2002 (24 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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