Active NPI
Violet Horsfall Osai
- Social Worker
- Riverdale, MD
National Provider Identifier
1831675388
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Social Worker
- License
- LG200007951
- Practice address
- 5519 Nicholson Street
202
Riverdale, MD 20737 - Phone
- (301) 458-9830
- NPI assigned
- Jul 18, 2018
- Sex
- Female
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 3
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Case Manager/Care Coordinator | 171M00000X | |||
| Home Health Aide | 374U00000X | HHA13791 | ||
| Social Worker | 104100000X | LG200007951 | DC | Primary |
Addresses
Primary practice location
5519 Nicholson Street
202
Riverdale, MD 20737
Mailing address
5519 Nicholson Street,
Apt 202
Riverdale, MD 20737
Phone (301) 458-9830
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1531872000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1831675388",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "5519 NICHOLSON STREET,",
"address_2": "APT 202",
"city": "RIVERDALE",
"state": "MD",
"postal_code": "20737",
"telephone_number": "301-458-9830"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "5519 NICHOLSON STREET",
"address_2": "202",
"city": "RIVERDALE",
"state": "MD",
"postal_code": "20737",
"telephone_number": "301-458-9830"
}
],
"practiceLocations": [],
"basic": {
"last_name": "OSAI",
"first_name": "VIOLET",
"middle_name": "HORSFALL",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2018-07-18",
"last_updated": "2026-07-13",
"certification_date": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "171M00000X",
"taxonomy_group": "",
"desc": "Case Manager/Care Coordinator",
"state": null,
"license": null,
"primary": false
},
{
"code": "374U00000X",
"taxonomy_group": "",
"desc": "Home Health Aide",
"state": null,
"license": "HHA13791",
"primary": false
},
{
"code": "104100000X",
"taxonomy_group": "",
"desc": "Social Worker",
"state": "DC",
"license": "LG200007951",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Riverdale, MD
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.