Ellen Ottenstein
Clinical Social Worker · Rockville, MD
Ellen Ottenstein is a clinical social worker with a practice address in Rockville, Maryland, and NPI 1760847693, issued on Dec 18, 2015. Check the license (Maryland 18014, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ellen Ottenstein
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 18014 MD
Self-reported in NPPES; status is on the state search - Practice location
- 15841 Crabbs Branch Way, Rockville, MD 20855
- Phone
- (301) 251-8965
- Enumerated
- Dec 18, 2015
- Record last updated
- Dec 18, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160531002270); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 9,007 in Maryland → Look up another NPI →
Also registered at 15841 Crabbs Branch Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eva Chen, LCSW-C, CEAP, CRCClinical Social Worker1639330764
- Stephanie Johnston, MSWSocial Worker1194171983
Verify Ellen Ottenstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license 18014Check 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
- Willow Oak Therapy Center, IncRockville, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ellen Ottenstein among 9,007 clinical social worker records in Maryland
Ellen Ottenstein 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 2015, is newer than 47% of them.
- NPI issued2015 · 47% of these records are older, 49% newer
- In a Medicare fileYes · 11% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated2012 · median 2006 among the 1,685 with a school on file
- Record last updated2015 · 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).
410 clinical social worker records list a practice address in Rockville
They are 410 of the 14,353 NPPES records with a practice address in Rockville, and 9,007 clinical social worker records in Maryland.
All 9,007 in Maryland → Every provider in Rockville → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Olivia Aybar-Torres, MSW-LCADCDerwood, MD 208551043405970
- Sally Benjamin, L.C.S.W.-C.Derwood, MD 208551013114727
- Eva Chen, LCSW-C, CEAP, CRCRockville, MD 208551639330764
- Jennifer Cohen, LCSW CRockville, MD 208551023154770
- Mary Herbers, MSW LCSWCRockville, MD 208551083786032
- Kathleen Higgins, LCSWRockville, MD 208551538254156
- Linda Kaplan, LCSW-CRockville, MD 208551033353305
- Kristen Keteltas, LCSW-CRockville, MD 208551821246893
Common questions
What is Ellen Ottenstein's NPI number?
Ellen Ottenstein's National Provider Identifier (NPI) is 1760847693, issued on Dec 18, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Ellen Ottenstein located?
The NPPES record lists a practice address at 15841 Crabbs Branch Way, Rockville, MD, 20855. Phone: (301) 251-8965. Providers update this record themselves, so call before visiting.
How can I verify Ellen Ottenstein's license?
NPPES lists Maryland license number 18014, 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.