Steven Barry Machtinger, MD

Primary specialty

Pediatric Allergy/Immunology PhysicianTaxonomy code 2080P0201X

License

G42041 Issued in CA

Practice address

450 Sutter St RM 933
San Francisco, CA 94108-3997

Phone

(415) 362-5443

NPI assigned

Jun 13, 2005

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

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

Specialty

Allergy/Immunology

Education

University of Pittsburgh School of Medicine, 1977

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Steven Machtinger MD and Associates IncGroup PAC ID 1850543372, 2 clinicians

Regents of the University of California - UCSFGroup PAC ID 3375822471, 78 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Peninsula Medical Center Hospital, Burlingame, CA, CCN 050007
• Sequoia Hospital Hospital, Redwood City, CA, CCN 050197

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Regents of the University of California - UCSF

  dba UCSF Clinical Integrated Partners

  • Multi-Specialty Clinic/Center
  • San Francisco, CA
  • NPI 1265890263
  Medicare reassignment Care Compare group NPD
• Steven Machtinger MD & Associates Inc

  • Allergy & Immunology Physician
  • San Mateo, CA
  • NPI 1427288133
  Medicare reassignment Care Compare group NPD
• LPCH Medical Group Div of Lucile

  dba Lucile Salter Packard Children's Hospital at Stanford

  • Children's Hospital
  • Palo Alto, CA
  • NPI 1417907940

  Pediatrics

  Medicare reassignment NPD
• Stanford Health Care

  dba Stanford Medical Center A Trade Name for Stanford Health Care

  • General Acute Care Hospital
  • Stanford, CA
  • NPI 1437292927

  Pediatrics

  Medicare reassignment NPD
• Stanford Health Care

  dba Stanford Health Care Emeryville 5800

  • General Acute Care Hospital
  • Emeryville, CA
  • NPI 1275076325

  Pediatrics

  NPD
• Stanford Health Care

  dba Stanford Health Care Specialty Pharmacy

  • Specialty Pharmacy
  • Mountain View, CA
  • NPI 1760366132
  NPD
• Lucile Salter Packard Children's Hospital at Stanford

  • Children's Hospital
  • Palo Alto, CA
  • NPI 1467442749
  NPD (past)
• Mills-Peninsula Health Services

  • General Acute Care Hospital
  • Burlingame, CA
  • NPI 1518937051
  NPD (past)
• Sequoia Health Services

  dba Sequoia Hospital

  • General Acute Care Hospital
  • Redwood City, CA
  • NPI 1235172057
  NPD (past)
• Stanford Health Care Tri-Valley

  • General Acute Care Hospital
  • Pleasanton, CA
  • NPI 1144389941
  NPD (past)
• Stanford Hospital and Clinics

  dba SHC Reference Laboratory

  • Clinical Medical Laboratory
  • Palo Alto, CA
  • NPI 1174698468
  NPD (past)
• Sutter Bay Hospitals

  dba Mills-Peninsula Medical Center

  • General Acute Care Hospital
  • Burlingame, CA
  • NPI 1043670334
  NPD (past)

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

• Dignity Community Care

  dba Sequoia Hospital

  • General Acute Care Hospital
  • Redwood City, CA
  • NPI 1568646735
  Care Compare affiliation
• Sutter Bay Hospitals

  dba Mills-Peninsula Medical Center

  • General Acute Care Hospital
  • Burlingame, CA
  • NPI 1043670334
  Care Compare affiliation
• Sutter Bay Hospitals

  dba Menlo Park Surgical Hospital

  • General Acute Care Hospital
  • Menlo Park, CA
  • NPI 1295199701
  Care Compare affiliation

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

{
    "created_epoch": "1118620800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765497600000",
    "number": "1093719437",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "725 WELCH RD",
            "city": "PALO ALTO",
            "state": "CA",
            "postal_code": "943041601",
            "telephone_number": "650-497-8000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "450 SUTTER ST RM 933",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941083997",
            "telephone_number": "415-362-5443"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "725 Welch Rd",
            "address_purpose": "LOCATION",
            "city": "Palo Alto",
            "state": "CA",
            "postal_code": "943041601",
            "country_code": "US",
            "telephone_number": "650-497-8000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "100 SOUTH ELLSWORTH AVENUE SUITE 707",
            "address_purpose": "LOCATION",
            "city": "SAN MATEO",
            "state": "CA",
            "postal_code": "944013927",
            "country_code": "US",
            "telephone_number": "650-696-8230",
            "fax_number": "650-696-8238",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MACHTINGER",
        "first_name": "STEVEN",
        "middle_name": "BARRY",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2005-06-13",
        "last_updated": "2025-12-12",
        "certification_date": "2025-12-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "CA",
            "license": "G42041",
            "primary": false
        },
        {
            "code": "2080P0201X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Allergy/Immunology",
            "state": "CA",
            "license": "G42041",
            "primary": true
        },
        {
            "code": "207K00000X",
            "taxonomy_group": "",
            "desc": "Allergy & Immunology",
            "state": "CA",
            "license": "G42041",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Marites Machate, PTA
• James Robert Macho, M.D.
• Samuel Machol
• Deborah K Machold, LCSW
• Edward L. Machtinger, MD
• Leslie Elaine Machtmes, M.A., MFT
• Melina Machuca
• Darren Machule, DMD PHD
• Kathryn Macia
• Esperanza Eva Macias

• Pediatric Allergy/Immunology Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Pediatric Allergy/Immunology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 12, 2025; 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.

Verify at the official NPI Registry.