Ryan Michael Holthaus, M.D.

Primary specialty

Diagnostic Radiology PhysicianTaxonomy code 2085R0202X

License

36598 Issued in IA

Practice address

1010 4TH St SW
Suite 100
Mason City, IA 50401-2857

Phone

(641) 424-0102

Fax

(641) 424-8059

NPI assigned

May 26, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in IA

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

Diagnostic Radiology

Education

University of Iowa, RJ & L Carver College of Medicine, 2001

Medicare assignment

May accept Medicare assignment

Group practices

Radiologists of North Iowa PCGroup PAC ID 4981592730, 13 clinicians

Allen Memorial Hospital CorporationGroup PAC ID 4284546045, 149 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mercyone North Iowa Medical Center Hospital, Mason City, IA, CCN 160064
• Mitchell County Regional Health Hospital, Osage, IA, CCN 161323
• Kossuth Regional Health Center Hospital, Algona, IA, CCN 161353
• Hancock County Health System Hospital, Britt, IA, CCN 161307
• Hansen Family Hospital Hospital, Iowa Falls, IA, CCN 161380

Merit-based Incentive Payment System (MIPS)

Final score

97.33 of 100Reported as group

Quality

94.65

Improvement activities

40

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rholthaus3947368@direct.trinity-health.org
• Direct secure messaging: rholthaus159371@uihcdirect.org

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.

• Radiologists of North Iowa PC

  • Diagnostic Radiology Physician
  • Mason City, IA
  • NPI 1942252051
  Medicare reassignment Care Compare group NPD
• Allen Memorial Hospital Corporation

  dba Allen Hospital

  • Women's Health Nurse Practitioner
  • Waterloo, IA
  • NPI 1891772927
  Medicare reassignment Care Compare group
• Belmond Community Hospital

  dba Iowa Specialty Hospital- Belmond

  • Family Medicine Physician
  • Belmond, IA
  • NPI 1821122623
  NPD
• Belmond Community Hospital

  dba Iowa Specialty Hospital - Belmond

  • Critical Access Hospital
  • Belmond, IA
  • NPI 1932142726
  NPD
• Iowa Specialty Hospital- Clarion

  • Critical Access Hospital
  • Clarion, IA
  • NPI 1396760153
  NPD
• Iowa Specialty Hospital- Clarion

  • Critical Access Hospital
  • Clarion, IA
  • NPI 1821045451
  NPD
• Floyd County Memorial Hospital Commission

  • Critical Access Hospital
  • Charles City, IA
  • NPI 1265402390
  NPD (past)
• Radiologists of North Iowa PC

  • Gynecology Physician
  • Mason City, IA
  • NPI 1548093628
  NPD (past)

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

• Ellsworth Municipal Hospital

  dba Hansen Family Hospital

  • Critical Access Hospital
  • Iowa Falls, IA
  • NPI 1831296052
  Care Compare affiliation
• Hancock County Health System

  • Critical Access Hospital
  • Britt, IA
  • NPI 1912938606
  Care Compare affiliation
• Kossuth Regional Health Center

  • Critical Access Hospital
  • Algona, IA
  • NPI 1841361276
  Care Compare affiliation
• Mercy Health Services-Iowa Corp

  dba Mercy Medical Center-North Iowa

  • Rural Acute Care Hospital
  • Mason City, IA
  • NPI 1467537886
  Care Compare affiliation
• Mitchell County Memorial Hospital

  • Critical Access Hospital
  • Osage, IA
  • NPI 1033291927
  Care Compare affiliation

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

{
    "created_epoch": "1148601600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1741651200000",
    "number": "1609822873",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1416 6TH ST SW",
            "city": "MASON CITY",
            "state": "IA",
            "postal_code": "504014818",
            "telephone_number": "641-424-0102",
            "fax_number": "641-424-8059"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1010 4TH ST SW",
            "address_2": "SUITE 100",
            "city": "MASON CITY",
            "state": "IA",
            "postal_code": "504012857",
            "telephone_number": "641-424-0102",
            "fax_number": "641-424-8059"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "403 1st St SE",
            "address_purpose": "LOCATION",
            "city": "Belmond",
            "state": "IA",
            "postal_code": "504211201",
            "country_code": "US",
            "telephone_number": "844-474-4321",
            "fax_number": "641-444-5554",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "401 S 17th St",
            "address_purpose": "LOCATION",
            "city": "Clear Lake",
            "state": "IA",
            "postal_code": "504282304",
            "country_code": "US",
            "telephone_number": "844-474-4321",
            "fax_number": "515-832-1400",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "840 W US Highway 18",
            "address_purpose": "LOCATION",
            "city": "Garner",
            "state": "IA",
            "postal_code": "504381023",
            "country_code": "US",
            "telephone_number": "844-474-4321",
            "fax_number": "641-925-1507",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1316 S Main St",
            "address_purpose": "LOCATION",
            "city": "Clarion",
            "state": "IA",
            "postal_code": "505252019",
            "country_code": "US",
            "telephone_number": "444-744-3218",
            "fax_number": "515-532-3119",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "104 S Story St",
            "address_purpose": "LOCATION",
            "city": "Boone",
            "state": "IA",
            "postal_code": "500364737",
            "country_code": "US",
            "telephone_number": "844-474-4321",
            "fax_number": "515-432-2895",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2700 1st Ave S",
            "address_purpose": "LOCATION",
            "city": "Fort Dodge",
            "state": "IA",
            "postal_code": "505014300",
            "country_code": "US",
            "telephone_number": "844-474-4321",
            "fax_number": "515-576-8581",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1924 Superior St",
            "address_purpose": "LOCATION",
            "city": "Webster City",
            "state": "IA",
            "postal_code": "505953146",
            "country_code": "US",
            "telephone_number": "844-474-4321",
            "fax_number": "515-832-1114",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HOLTHAUS",
        "first_name": "RYAN",
        "middle_name": "MICHAEL",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-26",
        "last_updated": "2025-03-11",
        "certification_date": "2025-03-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "IA",
            "license": "36598",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mc.mmcmc.him@direct.2.mycarefile.org",
            "affiliation": "Y",
            "endpointDescription": "Direct Email Address",
            "affiliationName": "MercyOne North Iowa",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "CCDA",
            "address_1": "1010 4th St SW",
            "address_2": "Suite 100",
            "city": "Mason City",
            "state": "IA",
            "country_code": "US",
            "postal_code": "504012857",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Adam Hoffmann, DO
• Lyell R Hogg, DDS
• James Cedrick Holden III, PA-S
• Lisa Holt, PMHNP-BC
• Patrick Lavern Holt
• Mark I Chieh Hong, M.D
• Tommi Kaye Honken, BA
• Linda A Hopper, RD,CSR,LD
• Hospice of North Iowa (MercyOne North Iowa Hospice)
• Hospitalist Medicine Physicians of Iowa - Mason City, PLLC

• Diagnostic Radiology Physician in Mason City, IA
• Providers in Mason City, IA by specialty
• Diagnostic Radiology Physician in Iowa

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 11, 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.