Active NPI
Joanna Halkias, MD
- Neonatal-Perinatal Medicine Physician
- Berkeley, CA
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Neonatal-Perinatal Medicine Physician
- License
- A83656
- Practice address
- 2450 Ashby Ave
Berkeley, CA 94705-2067 - Phone
- (510) 204-1626
- NPI assigned
- Jun 26, 2007
- 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 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Neonatal-Perinatal Medicine Physician | 2080N0001X | A83656 | CA | Primary |
Addresses
Primary practice location
2450 Ashby Ave
Berkeley, CA 94705-2067
Mailing address
350 Rhode Island St Ste 200
San Francisco, CA 94103-5188
Phone (415) 600-6400
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
Care Compare profile
Medicare Care Compare- Specialty
- Pediatric Medicine
- Education
- Other, 2001
- Medicare assignment
- May accept Medicare assignment
Practice addresses (Care Compare)
325 Distel Cir
Los Altos, CA 94022-1408
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| A83656 | CA | MD | Neonatal-Perinatal Medicine Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Sutter Bay Medical Foundation | Current | Accepting new patients | |
| Sutter Bay Medical Foundation | Current | Accepting new patients | |
| Sutter Bay Medical Foundation | Current | Accepting new patients |
Locations
18400 US Highway 18
Apple Valley, CA 92307
Phone (760) 810-7590
2450 Ashby Ave
Berkeley, CA 94705
Phone (510) 204-1566
350 John Muir Pkwy
Ste 160
Brentwood, CA 94513
Phone (925) 204-1920
1950 University Ave
Ste 160
East Palo Alto, CA 94303
Phone (650) 317-8100
3200 Kearney St
Fremont, CA 94538
Phone (510) 498-2800
1189 E Herndon Ave
Ste 103
Fresno, CA 93720
Phone (559) 450-7777
370 Distel Cir
Los Altos, CA 94022
Phone (650) 254-5200
600 Coffee Rd
Modesto, CA 95355
Phone (209) 550-4755
101 Rowland Way
Ste 220
Novato, CA 94945
Phone (415) 878-7200
747 52nd St
Fl 3
Oakland, CA 94609
Phone (510) 428-3276
795 El Camino Real
Palo Alto, CA 94301
Phone (650) 324-1832
1555 East St
Ste 200
Redding, CA 96001
Phone (530) 229-0911
151 N Sunrise Ave
Ste 1205
Roseville, CA 95661
Phone (916) 789-1505
350 Rhode Island St
Ste 200
San Francisco, CA 94103
Phone (415) 600-6240
3838 California St
Rm 410
San Francisco, CA 94118
Phone (415) 751-1847
123 S San Mateo Dr
San Mateo, CA 94401
Phone (650) 343-4200
3883 Airway Dr
Ste 220
Santa Rosa, CA 95403
Phone (707) 521-7750
10200 Trinity Pkwy
Ste 101
Stockton, CA 95219
Phone (209) 323-3488
550 S Green Valley Rd
Watsonville, CA 95076
Phone (831) 458-5865
Interoperability endpoints
- jhalkias160262@hisp.ehr.sutterhealth.org
Organizations & group practices 3
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.
-
- Multi-Specialty Clinic/Center
- Palo Alto, CA
- NPI 1013950807
-
- Multi-Specialty Clinic/Center
- Orinda, CA
- NPI 1366898538
-
- Clinical Medical Laboratory
- Santa Clara, CA
- NPI 1669287033
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1182816000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1770336000000",
"number": "1255537163",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "350 RHODE ISLAND ST STE 200",
"city": "SAN FRANCISCO",
"state": "CA",
"postal_code": "941035188",
"telephone_number": "415-600-6400",
"fax_number": "510-450-5823"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "2450 ASHBY AVE",
"city": "BERKELEY",
"state": "CA",
"postal_code": "947052067",
"telephone_number": "510-204-1626"
}
],
"practiceLocations": [],
"basic": {
"last_name": "HALKIAS",
"first_name": "JOANNA",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2007-06-26",
"last_updated": "2026-02-06",
"certification_date": "2026-02-06",
"status": "A"
},
"taxonomies": [
{
"code": "2080N0001X",
"taxonomy_group": "",
"desc": "Pediatrics, Neonatal-Perinatal Medicine",
"state": "CA",
"license": "A83656",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Berkeley, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 6, 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.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.