NPIMap

Individual provider Active NPI

Ernest S. Weeks Jr., M.D.

  • Gastroenterology Physician
  • Flowood, MS
National Provider Identifier
1134330822
Registry record updated Jan 22, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
20530 Issued in MS
Practice address
2510 Lakeland Dr
Flowood, MS 39232-9513
Phone
(601) 355-1234
Fax
(601) 326-3559
NPI assigned
May 24, 2007
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jan 22, 2026

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 20530 MS Primary

Addresses

Primary practice location

2510 Lakeland Dr
Flowood, MS 39232-9513

Mailing address

2510 Lakeland Dr
Flowood, MS 39232-9513
Phone (601) 355-1234

Other practice location 1

971 Lakeland Dr Ste 250
Jackson, MS 39216-4620
Phone (601) 200-5550

Other identifiers 1

IdentifierTypeStateIssuer
02420704MedicaidMS

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MS, MT2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20120717000385 MS Practitioner - Gastroenterology 6204092489 Reassigns benefits to 2 organizations
I20251001000344 MT Practitioner - Gastroenterology 6204092489 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Gastroenterology
Education
Other, 2006
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
St. Dominic Medical Associates LLCGroup PAC ID 0446303168, 130 clinicians
Gastrointestinal Associates PAGroup PAC ID 5294795241, 45 clinicians
Billings ClinicGroup PAC ID 6002993516, 814 clinicians

Practice addresses (Care Compare)

106 Highland Way
Madison, MS 39110-6933

106 Highland Way
Suite 101
Madison, MS 39110-6930
Phone 6013551234562

801 N 29TH St
Billings, MT 59101-0905
Phone (406) 238-2500

969 Lakeland Dr
Jackson, MS 39216-4606
Phone (601) 200-3100

Hospital & facility affiliations

  • St Dominic-Jackson Memorial Hospital Hospital, Jackson, MS, CCN 250048
  • Billings Clinic Hospital Hospital, Billings, MT, CCN 270004
  • Baptist Medical Center-Leake Hospital, Carthage, MS, CCN 251315
  • Merit Health River Oaks Hospital, Flowood, MS, CCN 250138
  • Mississippi Baptist Medical Center Hospital, Jackson, MS, CCN 250102

Merit-based Incentive Payment System (MIPS)

Final score
89.09 of 100Reported as apm
Quality
73.43
Promoting interoperability
100
Improvement activities
40

Merit-based Incentive Payment System (MIPS)

Final score
76.9 of 100Reported as group
Quality
47.44
Promoting interoperability
98
Improvement activities
40
Cost
77.24

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy134
Upper gastrointestinal (GI) endoscopy for acid reflux195

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
Billings Clinic Gastroenterology CurrentSince Aug 26, 2025 Accepting new patients
St. Dominic Medical Associates LLC Current Accepting new patients
Gastrointestinal Associates, PA CurrentSince Jul 15, 2012 Accepting new patients
Billings Clinic Current Accepting new patients
Gastrointestinal Associates, P.a. Gastroenterology Current Accepting new patients
St Dominic Medical Associates LLC CurrentSince Apr 1, 2023 Accepting new patients
St. Dominic Medical Associates, LLC CurrentSince Apr 1, 2023 Accepting new patients
Gastrointestinal Associates, P.a. Gastroenterology CurrentSince Jul 15, 2012 Accepting new patients
Billings Clinic Gastroenterology CurrentSince Aug 26, 2025 Accepting new patients
St Dominic Medical Associates LLC Past Accepting new patients
Billings Clinic Past Accepting new patients

Locations

2510 Lakeland Dr
Flowood, MS 39232
Phone (601) 355-1234

971 Lakeland Dr
Ste 250
Jackson, MS 39216
Phone (601) 200-4860

1421 N State St
Ste 203
Jackson, MS 39202
Phone (601) 355-1234

106 Highland Way
Ste 202
Madison, MS 39110
Phone (601) 200-3376

106 Highland Way
Ste 101
Madison, MS 39110
Phone (601) 355-1234

801 N 29th St
Billings, MT 59101
Phone (406) 238-2210

2800 10th Ave N
Billings, MT 59101
Phone (406) 248-3290

Interoperability endpoints

  • Direct secure messaging: eweeks8078@ummc.direct-ci.com
  • Direct secure messaging: eweeks150378@direct.bmhcc.org
  • Direct secure messaging: giasweeks@directaddress.net

Organizations & group practices 11

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.

Hospital & facility affiliations 12

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": "1179964800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769040000000",
    "number": "1134330822",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2510 LAKELAND DR",
            "city": "FLOWOOD",
            "state": "MS",
            "postal_code": "392329513",
            "telephone_number": "601-355-1234",
            "fax_number": "601-326-3559"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2510 LAKELAND DR",
            "city": "FLOWOOD",
            "state": "MS",
            "postal_code": "392329513",
            "telephone_number": "601-355-1234",
            "fax_number": "601-326-3559"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "971 Lakeland Dr Ste 250",
            "address_purpose": "LOCATION",
            "city": "Jackson",
            "state": "MS",
            "postal_code": "392164620",
            "country_code": "US",
            "telephone_number": "601-200-5550",
            "fax_number": "601-200-4887",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WEEKS",
        "first_name": "ERNEST",
        "middle_name": "S.",
        "name_prefix": "Dr.",
        "name_suffix": "Jr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-05-24",
        "last_updated": "2026-01-22",
        "certification_date": "2026-01-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "MS",
            "license": "20530",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "02420704",
            "state": "MS"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Flowood, MS

Sources for this page

Verify at the official NPI Registry.