Active NPI
Steven Merlin Johnson, MD
- Anesthesiology Physician
- San Jose, CA
National Provider Identifier
1679525323
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Anesthesiology Physician
- License
- A50511
- Practice address
- 225 N Jackson Ave
San Jose, CA 95116-1603 - Phone
- (408) 259-5000
- Fax
- (408) 928-7041
- NPI assigned
- May 17, 2006
- 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 |
|---|---|---|---|---|
| Anesthesiology Physician | 207L00000X | A50511 | CA | Primary |
Addresses
Primary practice location
225 N Jackson Ave
San Jose, CA 95116-1603
Mailing address
PO Box 84294
Seattle, WA 98124-5594
Phone (503) 372-2740
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 00A505110 | Medicaid | CA |
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)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| A50511 | CA | MD | Anesthesiology Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1147824000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1679525323",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 84294",
"city": "SEATTLE",
"state": "WA",
"postal_code": "981245594",
"telephone_number": "503-372-2740",
"fax_number": "503-372-2754"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "225 N JACKSON AVE",
"city": "SAN JOSE",
"state": "CA",
"postal_code": "951161603",
"telephone_number": "408-259-5000",
"fax_number": "408-928-7041"
}
],
"practiceLocations": [],
"basic": {
"last_name": "JOHNSON",
"first_name": "STEVEN",
"middle_name": "MERLIN",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-05-17",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207L00000X",
"taxonomy_group": "",
"desc": "Anesthesiology",
"state": "CA",
"license": "A50511",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "00A505110",
"state": "CA"
}
],
"endpoints": [],
"other_names": []
}Other providers in San Jose, CA
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.