Active NPI
Udaysankar Chockanathan
- Psychiatry Physician
- San Francisco, CA
National Provider Identifier
1316798325
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Psychiatry Physician
- License
- 15120
- Practice address
- 675 18TH St
San Francisco, CA 94143-4200 - Phone
- (415) 476-7000
- NPI assigned
- Mar 28, 2024
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Psychiatry Physician | 2084P0800X | 15120 | CA | Primary |
Addresses
Primary practice location
675 18TH St
San Francisco, CA 94143-4200
Mailing address
675 18TH St
San Francisco, CA 94143-4200
Phone (415) 476-7000
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in CA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20250624004117 | CA | Order and Referring Only - Psychiatry | 6800308917 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1711584000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1757635200000",
"number": "1316798325",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "675 18TH ST",
"city": "SAN FRANCISCO",
"state": "CA",
"postal_code": "941434200",
"telephone_number": "415-476-7000"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "675 18TH ST",
"city": "SAN FRANCISCO",
"state": "CA",
"postal_code": "941434200",
"telephone_number": "415-476-7000"
}
],
"practiceLocations": [],
"basic": {
"last_name": "CHOCKANATHAN",
"first_name": "UDAYSANKAR",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2024-03-28",
"last_updated": "2025-09-12",
"certification_date": "2025-09-12",
"status": "A"
},
"taxonomies": [
{
"code": "2084P0800X",
"taxonomy_group": "",
"desc": "Psychiatry & Neurology, Psychiatry",
"state": "CA",
"license": "15120",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in San Francisco, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 12, 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.