Individual provider Active NPI

Ari D Baron, M.D.

  • Specialist
  • San Francisco, CA
National Provider Identifier
1013086420
Registry record updated Jul 8, 2007
On this page

Key facts

NPPES NPI Registry
Primary specialty
SpecialistTaxonomy code 174400000X
License
G72619 Issued in CA
Practice address
2100 Webster Street Suite 225
San Francisco, CA 94115
Phone
(415) 923-3012
NPI assigned
Nov 7, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 8, 2007

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Specialist 174400000X G72619 CA Primary

Addresses

Primary practice location

2100 Webster Street Suite 225
San Francisco, CA 94115

Mailing address

2100 Webster Street Suite 225
San Francisco, CA 94115
Phone (415) 923-3012

Other identifiers 1

IdentifierTypeStateIssuer
YYY49266YMedicaidCA

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
I20081111000873 CA Practitioner - Hematology/Oncology 8325107907 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Hematology/Oncology
Education
Tufts University School of Medicine, 1990
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Pacific Hematology Oncology Assoc.Group PAC ID 0648214429, 3 clinicians
Sutter Bay Medical FoundationGroup PAC ID 4284538778, 3,783 clinicians

Practice addresses (Care Compare)

2100 Webster St
San Francisco, CA 94115-2376
Phone (415) 923-3012

2100 Webster St
Suite 200
San Francisco, CA 94115-2375
Phone (415) 600-7860

Hospital & facility affiliations

  • California Pacific Medical Center- Van Ness Campus Hospital, San Francisco, CA, CCN 050047
  • California Pacific Medical Ctr-Davies Campus Hosp Hospital, San Francisco, CA, CCN 050008
  • Peninsula Medical Center Hospital, Burlingame, CA, CCN 050007
  • California Pacific Medical Center - Mission Bernal Hospital, San Francisco, CA, CCN 050055
  • Novato Community Hospital Hospital, Novato, CA, CCN 050131

Merit-based Incentive Payment System (MIPS)

Final score
95.17 of 100Reported as group
Quality
80.02
Improvement activities
40

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
G72619CAMDSpecialist

Practice roles

OrganizationSpecialtyStatusNew patients
Sutter Bay Medical Foundation CurrentSince Nov 1, 2025 Accepting new patients
Sutter Bay Medical Foundation Current Accepting new patients
Sutter Bay Medical Foundation CurrentSince Nov 1, 2025 Accepting new patients
Pacific Hematology Oncology Assoc Specialist CurrentSince Sep 19, 1996 Accepting new patients
Sutter East Bay Medical Foundation Past Accepting new patients

Locations

18400 US Highway 18
Apple Valley, CA 92307
Phone (760) 810-7590

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

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

2100 Webster St
Ste 225
San Francisco, CA 94115
Phone (415) 923-3012

3838 California St
Rm 410
San Francisco, CA 94118
Phone (415) 751-1847

2100 Webster St
Ste 205
San Francisco, CA 94115

2100 Webster St
Ste 200
San Francisco, CA 94115
Phone (415) 600-7860

2100 Webster St
Ste 220
San Francisco, CA 94115

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: abaron18922@hisp.ehr.sutterhealth.org

Organizations & group practices 5

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.

Hospital & facility affiliations 6

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1162857600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1183852800000",
    "number": "1013086420",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2100 WEBSTER STREET SUITE 225",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "94115",
            "telephone_number": "415-923-3012"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2100 WEBSTER STREET SUITE 225",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "94115",
            "telephone_number": "415-923-3012"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BARON",
        "first_name": "ARI",
        "middle_name": "D",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-11-07",
        "last_updated": "2007-07-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "174400000X",
            "taxonomy_group": "",
            "desc": "Specialist",
            "state": "CA",
            "license": "G72619",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "YYY49266Y",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in San Francisco, CA

Sources for this page

Verify at the official NPI Registry.