Active NPI
Harjus Singh Birk, M.D.
- Neurology Physician
- Sacramento, CA
National Provider Identifier
1275064396
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Neurology Physician
- License
- 164164
- Practice address
- 4301 X St
Sacramento, CA 95817-2214 - Phone
- (916) 734-6343
- NPI assigned
- Mar 21, 2017
- 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 |
|---|---|---|---|---|
| Neurology Physician | 2084N0400X | 164164 | CA | Primary |
Addresses
Primary practice location
4301 X St
Sacramento, CA 95817-2214
Mailing address
4301 X St
Sacramento, CA 95817-2214
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
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| NOT YET DETERMINED | CA | MD | Neurological Surgery Physician |
| 164164 | CA | MD | Neurology Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1490054400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1787529600000",
"number": "1275064396",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "4301 X ST",
"city": "SACRAMENTO",
"state": "CA",
"postal_code": "958172214"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "4301 X ST",
"city": "SACRAMENTO",
"state": "CA",
"postal_code": "958172214",
"telephone_number": "916-734-6343"
}
],
"practiceLocations": [],
"basic": {
"last_name": "BIRK",
"first_name": "HARJUS",
"middle_name": "SINGH",
"name_prefix": "Dr.",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2017-03-21",
"last_updated": "2026-08-24",
"certification_date": "2026-08-24",
"status": "A"
},
"taxonomies": [
{
"code": "2084N0400X",
"taxonomy_group": "",
"desc": "Psychiatry & Neurology, Neurology",
"state": "CA",
"license": "164164",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Sacramento, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 24, 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.