John P. O'Brien, LCSW-C
Clinical Social Worker · Frederick, MD
John P. O'Brien, LCSW-C is a clinical social worker with a practice address in Frederick, Maryland, and NPI 1700137940, issued on Sep 27, 2012. Check the license (Maryland 14829, as entered in NPPES) with the Maryland board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John P. O'Brien
- Credential
- LCSW-C
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 14829 MD
Self-reported in NPPES; status is on the state search - Practice location
- 198 Thomas Johnson Dr, Frederick, MD 21702
- Phone
- (301) 208-8900
- Enumerated
- Sep 27, 2012
- Record last updated
- Sep 7, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (301) 208-8369
- Medicare enrollment
- Enrolled (PECOS I20150605000761); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 9,007 in Maryland → Look up another NPI →
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Verify John P. O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license 14829Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John P. O'Brien among 9,007 clinical social worker records in Maryland
John P. O'Brien, LCSW-C is one of 9,007 clinical social worker records with a practice address in Maryland. 11% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2012, is newer than 36% of them.
- NPI issued2012 · 36% of these records are older, 61% newer
- In a Medicare fileNo · 11% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated2002 · median 2006 among the 1,685 with a school on file
- Record last updated2017 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
348 clinical social worker records list a practice address in Frederick
They are 348 of the 3,981 NPPES records with a practice address in Frederick, and 9,007 clinical social worker records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 9,007 in Maryland → Every provider in Frederick → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Fredrick Balius, M.S.W., LCSW-CFrederick, MD 217021225027139
- Gayle Bromberg, LCSW-CFrederick, MD 217021235131293
- William Derbyshire, LCSW-CFrederick, MD 217021720082480
- Dawn Dia, LCSW-CFrederick, MD 217021750362968
- Sarah Drennan, LCSW-CFrederick, MD 217021396734075
- Karen Hall, MSW, LCSW-CFrederick, MD 217021346239035
- Deborah Hubbell, MSW, LCSW-CFrederick, MD 217021285623934
- David Hudak, LCSW-CFrederick, MD 217021477557205
Common questions
What is John P. O'Brien, LCSW-C's NPI number?
John P. O'Brien, LCSW-C's National Provider Identifier (NPI) is 1700137940, issued on Sep 27, 2012. An NPI identifies a provider in billing; it is not a license.
Where is John P. O'Brien, LCSW-C located?
The NPPES record lists a practice address at 198 Thomas Johnson Dr, Frederick, MD, 21702. Phone: (301) 208-8900. Providers update this record themselves, so call before visiting.
How can I verify John P. O'Brien, LCSW-C's license?
NPPES lists Maryland license number 14829, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.