Active NPI
Madison Chelsea Johnson
- Social Worker
- San Leandro, CA
National Provider Identifier
1356867204
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Social Worker
- License
- 109455
- Practice address
- 2275 Arlington Dr
San Leandro, CA 94578-1132 - Phone
- (510) 317-1444
- NPI assigned
- Aug 22, 2017
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 4
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Counselor | 101Y00000X | |||
| Clinical Social Worker | 1041C0700X | 109455 | CA | |
| Student in an Organized Health Care Education/Training Program | 390200000X | |||
| Social Worker | 104100000X | 109455 | CA | Primary |
Addresses
Primary practice location
2275 Arlington Dr
San Leandro, CA 94578-1132
Mailing address
2275 Arlington Dr
San Leandro, CA 94578-1132
Phone (510) 317-1444
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: No
- Power mobility devices: No
- Hospice: No
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 109455 | CA | MD | General Practice Dentistry |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| City & County of San Francisco | Current | Accepting new patients |
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- Clinical Medical Laboratory
- San Francisco, CA
- NPI 1982737524
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1503360000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1747699200000",
"number": "1356867204",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "2275 ARLINGTON DR",
"city": "SAN LEANDRO",
"state": "CA",
"postal_code": "945781132",
"telephone_number": "510-317-1444"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "2275 ARLINGTON DR",
"city": "SAN LEANDRO",
"state": "CA",
"postal_code": "945781132",
"telephone_number": "510-317-1444"
}
],
"practiceLocations": [],
"basic": {
"last_name": "JOHNSON",
"first_name": "MADISON",
"middle_name": "CHELSEA",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2017-08-22",
"last_updated": "2025-05-20",
"certification_date": "2025-05-20",
"status": "A"
},
"taxonomies": [
{
"code": "101Y00000X",
"taxonomy_group": "",
"desc": "Counselor",
"state": null,
"license": null,
"primary": false
},
{
"code": "1041C0700X",
"taxonomy_group": "",
"desc": "Social Worker, Clinical",
"state": "CA",
"license": "109455",
"primary": false
},
{
"code": "390200000X",
"taxonomy_group": "",
"desc": "Student in an Organized Health Care Education/Training Program",
"state": null,
"license": null,
"primary": false
},
{
"code": "104100000X",
"taxonomy_group": "",
"desc": "Social Worker",
"state": "CA",
"license": "109455",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in San Leandro, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 20, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.