John Howard Greenfield III, M. D.

Primary specialty

Orthopaedic Surgery PhysicianTaxonomy code 207X00000X

License

A91052 Issued in CA

Practice address

1201 Alhambra Blvd Ste 400
Sacramento, CA 95816-5243

Phone

(916) 733-5098

Fax

(916) 733-9814

NPI assigned

Jul 28, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Electronic endpoints 1

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

Orthopedic Surgery

Education

University of Texas Southwestern Medical School at Dallas, 2000

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Permanente Medical Group IncGroup PAC ID 8921910225, 10,928 clinicians

Sutter Valley Medical FoundationGroup PAC ID 9830094515, 2,473 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Kaiser Foundation Hospital - Sacramento Hospital, Sacramento, CA, CCN 050425

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 and National Provider Directory roles.

• Permanente Medical Group Inc

  • Internal Medicine Physician
  • Santa Clara, CA
  • NPI 1073606299

  Orthopaedic Surgery

  Medicare reassignment Care Compare group NPD
• Sutter Valley Medical Foundation

  • Multi-Specialty Clinic/Center
  • Modesto, CA
  • NPI 1669846986
  Medicare reassignment Care Compare group
• Permanente Medical Group Inc

  • Internal Medicine Physician
  • Stockton, CA
  • NPI 1548343510

  Orthopaedic Surgery

  NPD
• Permanente Medical Group, Inc

  • Clinical Medical Laboratory
  • San Jose, CA
  • NPI 1497971584
  NPD
• Atlanta Knee and Shoulder Clinic PC

  • Specialist
  • Stockbridge, GA
  • NPI 1538296678
  NPD

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

• Kaiser Foundation Hospitals

  • General Acute Care Hospital
  • Sacramento, CA
  • NPI 1952476665
  Care Compare affiliation

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

{
    "created_epoch": "1154044800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778112000000",
    "number": "1861406506",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 255228",
            "city": "SACRAMENTO",
            "state": "CA",
            "postal_code": "958655228",
            "telephone_number": "800-470-0071",
            "fax_number": "916-854-6769"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1201 ALHAMBRA BLVD STE 400",
            "city": "SACRAMENTO",
            "state": "CA",
            "postal_code": "958165243",
            "telephone_number": "916-733-5098",
            "fax_number": "916-733-9814"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1035 Southcrest Dr",
            "address_2": "Suite 100",
            "address_purpose": "LOCATION",
            "city": "Stockbridge",
            "state": "GA",
            "postal_code": "302816118",
            "country_code": "US",
            "telephone_number": "770-389-9005",
            "fax_number": "770-389-5251",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GREENFIELD",
        "first_name": "JOHN",
        "middle_name": "HOWARD",
        "name_prefix": "Dr.",
        "name_suffix": "III",
        "credential": "M. D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-28",
        "last_updated": "2026-05-07",
        "certification_date": "2026-05-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "CA",
            "license": "A91052",
            "primary": true
        },
        {
            "code": "174400000X",
            "taxonomy_group": "",
            "desc": "Specialist",
            "state": "GA",
            "license": "052272",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "SOAP",
            "endpointTypeDescription": "SOAP URL",
            "endpoint": "https://careepicwest.kp.org:14430/Interconnect-prodcalgateway/wcf/epic.community.hie/xcpdrespondinggatewaysync.svc/ncalceq",
            "affiliation": "Y",
            "endpointDescription": "Carequality",
            "affiliationName": "The Permanente Medical Group",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "C-CDA",
            "address_1": "2025 Morse Ave",
            "city": "Sacramento",
            "state": "CA",
            "country_code": "US",
            "postal_code": "958252115",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Heather Rose Greene
• Jo Lynne Greene, CADC II-CA
• Kathleen Joanne Greene, D.D.S.
• Nicole Greene
• Sasha Nicole Greene
• Rachel June Greenfield, LCSW
• David G Greenhalgh, MD
• Greenhaven Family Dental LLC
• Greenhaven Family Practice, Inc
• Greenhaven Optometry

• Orthopaedic Surgery Physician in Sacramento, CA
• Providers in Sacramento, CA by specialty
• Orthopaedic Surgery Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 7, 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.

Verify at the official NPI Registry.