Individual provider Active NPI

Joanna Halkias, MD

  • Neonatal-Perinatal Medicine Physician
  • Berkeley, CA
National Provider Identifier
1255537163
Registry record updated Feb 6, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Neonatal-Perinatal Medicine PhysicianTaxonomy code 2080N0001X
License
A83656 Issued in CA
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

Updated by the provider on Feb 6, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
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
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20260220003509 CA Practitioner - Pediatric Medicine 3870074537 Reassigns benefits to 1 organization

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

LicenseStateTypeSpecialty
A83656CAMDNeonatal-Perinatal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Sutter Bay Medical Foundation CurrentSince Jan 7, 2026 Accepting new patients
Sutter Bay Medical Foundation CurrentSince Jan 7, 2026 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

  • Direct secure messaging: 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.

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

Verify at the official NPI Registry.