Individual provider Active NPI

Michael James Krier, M.D.

  • Gastroenterology Physician
  • Fairfield, CA
National Provider Identifier
1497808414
Registry record updated Apr 8, 2016
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
A100295 Issued in CA
Practice address
101 Bodin Cir
Fairfield, CA 94535-1809
Phone
(707) 423-4501
NPI assigned
Jan 21, 2007
Last updated
Apr 8, 2016By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Apr 8, 2016

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Gastroenterology Physician 207RG0100X A100295 CA Primary

Addresses

Primary practice location

101 Bodin Cir
Fairfield, CA 94535-1809

Mailing address

1200 B Gale Wilson Blvd
Fairfield, CA 94533-3552
Phone (707) 646-4465

Medicare participation

Medicare enrollment files
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

Enrollment IDStateProvider typePAC IDDetails
I20160419002549 CA Practitioner - Gastroenterology 3173747383 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Gastroenterology
Education
Wright State University Boonshoft School of Medicine, 2004
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Northbay Health Medical FoundationGroup PAC ID 3274010871, 207 clinicians

Practice addresses (Care Compare)

1200 B Gale Wilson Blvd
Fairfield, CA 94533-3552
Phone (707) 429-3600

4520 Business Ctr Dr
Suite 200
Vacaville, CA 94534
Phone (707) 646-5500

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy165
Upper gastrointestinal (GI) endoscopy for acid reflux167

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
A100295CAMDGastroenterology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Northbay Physicians Surgery Center LLC CurrentSince Dec 21, 2025 Accepting new patients
Northbay Health Medical Foundation CurrentSince Jan 1, 2026 Accepting new patients
Northbay Healthcare Group Gastroenterology CurrentSince Mar 9, 2016 Accepting new patients
Northbay Healthcare Group Gastroenterology CurrentSince Mar 9, 2016 Accepting new patients
Northbay Healthcare Group Current Accepting new patients
Yakima Valley Memorial Hospital Association Past Accepting new patients

Locations

1200 B Gale Wilson Blvd
Fairfield, CA 94533
Phone (707) 429-3600

4520 Business Center Dr
#180
Fairfield, CA 94534
Phone (707) 646-3555

4520 Business Center Dr
Ste 180
Fairfield, CA 94534
Phone (707) 646-3555

4520 Business Center Dr
Ste 200
Fairfield, CA 94534
Phone (707) 646-3500

101 Bodin Cir
Travis AFB, CA 94535
Phone (707) 423-2300

1000 Nut Tree Rd
Vacaville, CA 95687
Phone (707) 446-4000

1006 Nut Tree Rd
Vacaville, CA 95687
Phone (707) 446-2800

1010 Nut Tree Rd
#100A
Vacaville, CA 95687
Phone (707) 646-3555

1010 Nut Tree Rd
Ste 100B
Vacaville, CA 95687
Phone (707) 646-7999

1020 Nut Tree Rd
#270
Vacaville, CA 95687
Phone (707) 646-4100

101 Main St
Winters, CA 95694
Phone (530) 795-4123

Interoperability endpoints

  • FHIR API: https://fhir-myrecord.cerner.com/r4/ef853cc1-94e4-4ed7-883a-9be7485e458e/
  • FHIR API: https://fhir-myrecord.cerner.com/r4/UMZ-Uxn6V9x08sH5gCnG-5yPg9ZX7et6/

Organizations & group practices 6

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.

Hospital & facility affiliations 1

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

NPI Registry JSON

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

{
    "created_epoch": "1169337600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1460073600000",
    "number": "1497808414",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1200 B GALE WILSON BLVD",
            "city": "FAIRFIELD",
            "state": "CA",
            "postal_code": "945333552",
            "telephone_number": "707-646-4465",
            "fax_number": "707-646-4902"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "101 BODIN CIR",
            "city": "FAIRFIELD",
            "state": "CA",
            "postal_code": "945351809",
            "telephone_number": "707-423-4501"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KRIER",
        "first_name": "MICHAEL",
        "middle_name": "JAMES",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-01-21",
        "last_updated": "2016-04-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "A100295",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Fairfield, CA

Sources for this page

Verify at the official NPI Registry.