John Moritz Wiemann IV, MD

Primary specialty

Orthopaedic Surgery PhysicianTaxonomy code 207X00000X

License

A140151 Issued in CA

Practice address

930 Sunnyslope Rd Ste C4
Hollister, CA 95023-5617

Phone

(831) 636-7950

NPI assigned

Feb 6, 2007

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

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

Orthopedic Surgery

Education

University of California, San Diego School of Medicine, 2006

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Hazel Hawkins Memorial HospitalGroup PAC ID 9133038326, 52 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Hazel Hawkins Memorial Hospital Hospital, Hollister, CA, CCN 051337

Merit-based Incentive Payment System (MIPS)

Final score

93.01 of 100Reported as group

Quality

76.71

Promoting interoperability

100

Improvement activities

40

Cost

74

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: john.wiemann@hhch.eclinicaldirectplus.com

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.

• Hazel Hawkins Memorial Hospital

  dba San Benito Health Care District

  • General Acute Care Hospital
  • Hollister, CA
  • NPI 1275578817
  Medicare reassignment Care Compare group NPD
• Community Foundation Medical Group

  dba Sante' Foundation Medical Group

  • Internal Medicine Physician
  • Fresno, CA
  • NPI 1811258510
  Medicare reassignment NPD
• HNC, LLC

  dba Kaizen Surgery Center

  • Ambulatory Surgical Clinic/Center
  • Clovis, CA
  • NPI 1457010209
  NPD (past) Authorized official
• Community Foundation Medical Group

  dba Sante' Foundation Medical Group

  • Internal Medicine Physician
  • Fresno, CA
  • NPI 1003329491

  Orthopaedic Surgery

  NPD
• Community Foundation Medical Group

  dba Sante' Foundation Medical Group

  • Orthopaedic Surgery Physician
  • Fresno, CA
  • NPI 1376056721
  NPD
• Cytodiagnostics

  • Anatomic Pathology & Clinical Pathology Physician
  • Hollister, CA
  • NPI 1396739074
  NPD
• Hazel Hawkins Memorial Hospital

  dba Hazel Hawkins primary Care & Surgical Specialty Center

  • Rural Health Clinic/Center
  • Hollister, CA
  • NPI 1013628353
  NPD
• University Faculty Associates, Inc.

  • Emergency Medicine Physician
  • Fresno, CA
  • NPI 1235537283
  NPD (past)

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

• Hazel Hawkins Memorial Hospital

  dba San Benito Health Care District

  • General Acute Care Hospital
  • Hollister, CA
  • NPI 1275578817
  Care Compare affiliation

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

{
    "created_epoch": "1170720000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777507200000",
    "number": "1730228768",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "383 CORRAL DE TIERRA RD",
            "city": "CORRAL DE TIERRA",
            "state": "CA",
            "postal_code": "939088917",
            "telephone_number": "937-641-9594"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "930 SUNNYSLOPE RD STE C4",
            "city": "HOLLISTER",
            "state": "CA",
            "postal_code": "950235617",
            "telephone_number": "831-636-7950"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WIEMANN",
        "first_name": "JOHN",
        "middle_name": "MORITZ",
        "name_prefix": "Dr.",
        "name_suffix": "IV",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-02-06",
        "last_updated": "2026-04-30",
        "certification_date": "2026-04-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207XP3100X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery, Pediatric Orthopaedic Surgery",
            "state": "CA",
            "license": "A140151",
            "primary": false
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "CA",
            "license": "A140151",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Wennifred S Hsu DDS Inc (Plaza Dental)
• Elizabeth Rochelle Werner, RD
• Whispering Pines Inn LLC
• Carolina Rachel White
• Mary O White, PHARMD
• Candace Wilson
• Shelsea Rachelle Winkler, O.D.
• Joerg Michael Wittenberg, M.D., D.D.S.
• Shannon Nathan Wong, RN
• Amy Elizabeth Wright

• Orthopaedic Surgery Physician in Hollister, CA
• Providers in Hollister, 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 Apr 30, 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.