Eva Marie Costlow, LCSW-C
Clinical Social Worker · Frederick, MD
Eva Marie Costlow, LCSW-C is a clinical social worker with a practice address in Frederick, Maryland, and NPI 1811594849, issued on Oct 2, 2020. Check the license (Maryland 21001, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Eva Marie Costlow
- Credential
- LCSW-C
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 21001 MD
Self-reported in NPPES; status is on the state search - Practice location
- 226 S Jefferson St, Frederick, MD 21701
- Phone
- (301) 663-6135
- Enumerated
- Oct 2, 2020
- Record last updated
- Oct 2, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20201007003241); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 9,007 in Maryland → Look up another NPI →
Also registered at 226 S Jefferson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Linda Cann, MSN,APRN,FNP,PMHNPPsychiatric/Mental Health Nurse Practitioner1033754221
- Tess De Smedt, LMSWSocial Worker1780362459
- Richard Deise, LGPCPastoral Counselor1669983607
- Leah Derr, LGSWSocial Worker1043727258
Verify Eva Marie Costlow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license 21001Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Mental Health Assoc OF Frederick CtyFrederick, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eva Marie Costlow among 9,007 clinical social worker records in Maryland
Eva Marie Costlow, 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. Its NPI, issued in 2020, is newer than 70% of them.
- NPI issued2020 · 70% of these records are older, 25% newer
- In a Medicare fileYes · 11% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated2014 · median 2006 among the 1,685 with a school on file
- Record last updated2020 · 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.
All 9,007 in Maryland → Every provider in Frederick → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Margaret Adams, LCSW-CFrederick, MD 217011275538654
- Alice Berlin, LCSW-CFrederick, MD 217011154326551
- Sky Cappucci, LCSW-CFrederick, MD 217011629000419
- Jo Ann Fritz, LCSW/CFrederick, MD 217011932115714
- Patrick Hammett, MSWFrederick, MD 217011275562738
- Larry Harper, LCSW-CFrederick, MD 217011881620789
- Rhonda Jackson, LCSW-CFrederick, MD 217011134140957
- Barbara Lohman-Flynn, LCSW-CFrederick, MD 217011306841796
Common questions
What is Eva Marie Costlow, LCSW-C's NPI number?
Eva Marie Costlow, LCSW-C's National Provider Identifier (NPI) is 1811594849, issued on Oct 2, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Eva Marie Costlow, LCSW-C located?
The NPPES record lists a practice address at 226 S Jefferson St, Frederick, MD, 21701. Phone: (301) 663-6135. Providers update this record themselves, so call before visiting.
How can I verify Eva Marie Costlow, LCSW-C's license?
NPPES lists Maryland license number 21001, 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. Medicare files from data.cms.gov. 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.