Active NPI
Kelsen Kobayashi, MD
- Surgery Physician
- Los Angeles, CA
National Provider Identifier
1548062730
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Surgery Physician
- License
- A211558
- Practice address
- 1200 N State St Clinic Tower Suite A7D
Los Angeles, CA 90089-1001 - Phone
- (323) 442-5755
- NPI assigned
- Mar 26, 2025
- Sex
- Male
- Sole proprietor
- Yes
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 |
|---|---|---|---|---|
| Surgery Physician | 208600000X | A211558 | CA | Primary |
Addresses
Primary practice location
1200 N State St Clinic Tower Suite A7D
Los Angeles, CA 90089-1001
Mailing address
1200 N State St Clinic Tower Suite A7D
Los Angeles, CA 90089-1001
Phone (323) 442-5755
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 |
|---|---|---|---|---|
| I20250703002524 | CA | Order and Referring Only - General Surgery | 0446764245 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1742947200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1787702400000",
"number": "1548062730",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1200 N STATE ST CLINIC TOWER SUITE A7D",
"city": "LOS ANGELES",
"state": "CA",
"postal_code": "900891001",
"telephone_number": "323-442-5755"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1200 N STATE ST CLINIC TOWER SUITE A7D",
"city": "LOS ANGELES",
"state": "CA",
"postal_code": "900891001",
"telephone_number": "323-442-5755"
}
],
"practiceLocations": [],
"basic": {
"last_name": "KOBAYASHI",
"first_name": "KELSEN",
"credential": "MD",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2025-03-26",
"last_updated": "2026-08-26",
"certification_date": "2026-08-26",
"status": "A"
},
"taxonomies": [
{
"code": "208600000X",
"taxonomy_group": "193400000X SINGLE SPECIALTY GROUP",
"desc": "Surgery",
"state": "CA",
"license": "A211558",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Los Angeles, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 26, 2026; 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.