Mariko Hagiwara, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

0101289410 Issued in VA

Practice address

1300 E Marshall St
Richmond, VA 23298-5028

Phone

(804) 828-3144

Fax

(804) 628-7104

NPI assigned

Apr 9, 2010

Sex

Female

Sole proprietor

No

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

Specialties & licenses 4

Addresses

Other names 1

• Mariko Saso-Hagiwara Former name

Medicare fee-for-service enrollment

Enrolled in TX, IA2 enrollments

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 2

Specialty

HospitalistAlso: Internal Medicine

Education

Other, 2004

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

State University of IowaGroup PAC ID 7618884230, 1,886 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• University of Iowa Hospital & Clinics Hospital, Iowa City, IA, CCN 160058

Merit-based Incentive Payment System (MIPS)

Final score

80.02 of 100Reported as group

Quality

75.68

Promoting interoperability

78

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mhagiwara124023@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.

• State University of Iowa

  • Family Medicine Physician
  • Iowa City, IA
  • NPI 1477554814

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Hospitalist Medicine Physicians of Texas, PLLC

  • Internal Medicine Physician
  • Humble, TX
  • NPI 1629307095
  Medicare reassignment NPD
• Sound Inpatient Physicians of Texas I, Inc

  • Family Medicine Physician
  • Sugar Land, TX
  • NPI 1831424563

  Internal Medicine

  Medicare reassignment NPD
• State University of Iowa

  • Student Health Clinic/Center
  • Iowa City, IA
  • NPI 1285635664
  NPD (past)

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

• State University of Iowa

  • General Acute Care Hospital
  • Iowa City, IA
  • NPI 1376544320
  Care Compare affiliation

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

{
    "created_epoch": "1270771200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1789084800000",
    "number": "1679899157",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 780125",
            "city": "PHILADELPHIA",
            "state": "PA",
            "postal_code": "191780125",
            "telephone_number": "804-922-4844"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1300 E MARSHALL ST",
            "city": "RICHMOND",
            "state": "VA",
            "postal_code": "232985028",
            "telephone_number": "804-828-3144",
            "fax_number": "804-628-7104"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "618 Hospital Rd",
            "address_purpose": "LOCATION",
            "city": "Tappahannock",
            "state": "VA",
            "postal_code": "225605000",
            "country_code": "US",
            "telephone_number": "804-380-0744",
            "fax_number": "804-628-7104",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1755 N Mecklenburg Ave",
            "address_purpose": "LOCATION",
            "city": "South Hill",
            "state": "VA",
            "postal_code": "239704080",
            "country_code": "US",
            "telephone_number": "434-447-3151",
            "fax_number": "434-584-5023",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1250 E Marshall St",
            "address_purpose": "LOCATION",
            "city": "Richmond",
            "state": "VA",
            "postal_code": "232985023",
            "country_code": "US",
            "telephone_number": "804-828-3144",
            "fax_number": "804-628-7104",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "200 Hawkins Dr",
            "address_purpose": "LOCATION",
            "city": "Iowa City",
            "state": "IA",
            "postal_code": "522421009",
            "country_code": "US",
            "telephone_number": "319-356-1616",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "701 W Forevergreen Rd",
            "address_purpose": "LOCATION",
            "city": "North Liberty",
            "state": "IA",
            "postal_code": "523179848",
            "country_code": "US",
            "telephone_number": "319-356-4019",
            "fax_number": "319-356-3949",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "520 Madison Oak Dr",
            "address_purpose": "LOCATION",
            "city": "San Antonio",
            "state": "TX",
            "postal_code": "782583913",
            "country_code": "US",
            "telephone_number": "210-297-4000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HAGIWARA",
        "first_name": "MARIKO",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2010-04-09",
        "last_updated": "2026-09-11",
        "certification_date": "2026-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "IA",
            "license": "MD-44493",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "VA",
            "license": "0101289410",
            "primary": true
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "TX",
            "license": "P8360",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IA",
            "license": "MD-44493",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MARIKO",
            "last_name": "SASO-HAGIWARA",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Laura Lynn Hafer, LCSW
• Kenneth S Haft, M.D.
• Betsy Ann Hagan, DDS
• Janice M Hagan, PA-C
• Ashley Elizabeth Griswold Haggerty, DO
• Beau Daniel Hagler, M.D.
• Blair E. Hagler, NP
• John R Hague, MD
• Pamela Dickinson Hagues, MS ED
• Jee Ho Hahm, M.D.

• Internal Medicine Physician in Richmond, VA
• Providers in Richmond, VA by specialty
• Internal Medicine Physician in Virginia

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