NPIMap

Organization Active NPI

State of Mississippi - University of Mississippi Medical Center

Doing business as Merit Health Madison

  • General Acute Care Hospital
  • Canton, MS
National Provider Identifier
1194770404
Registry record updated Feb 20, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
General Acute Care HospitalTaxonomy code 282N00000X
License
16243 Issued in MS
Legal business name
STATE OF MISSISSIPPI - UNIVERSITY OF MISSISSIPPI MEDICAL CENTER
Doing business as
Merit Health Madison
UMMC - Madison
Practice address
161 River Oaks Drive
Canton, MS 39046-5375
Phone
(601) 496-5500
Fax
(601) 855-5100
NPI assigned
May 24, 2006
Last updated
Feb 20, 2026By the provider in NPPES
Organization subpart
Yes
Parent organization
STATE OF MISSISSIPPI - UNIVERSITY OF MISSISSIPPI MEDICAL CENTERAs reported in NPPES

NPPES NPI Registry

Updated by the provider on Feb 20, 2026

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

Authorized official

Name
Jeffrey Grimsley
Title
Associate Cfo
Phone
(601) 815-6270

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
General Acute Care Hospital 282N00000X 16243 MS Primary

Addresses

Primary practice location

161 River Oaks Drive
Canton, MS 39046-5375

Mailing address

504 Clinton Center Dr Ste 4100
Clinton, MS 39056-5610
Phone (601) 815-6381

Other names 2

  • Merit Health Madison Doing business as
  • UMMC - Madison Doing business as

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MS

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20250828003960 MS Part A Provider - Hospital 1850293036 Practice locations: Canton, MS

NPI to CCN mapping 1

The Medicare certification numbers (CCNs) connected to NPI 1194770404. Details of each certification follow.

Hospital certification: CCN 250038

Legal name
STATE OF MISSISSIPPI-UNIVERSITY OF MISSISSIPPI MEDICAL CENTER
Doing business as
UMMC MADISON
Certification status
Active
Provider type (POS)
Hospital – Short-term
Participating since
Jul 1, 1966
Last certification
Feb 11, 2017
Beds
67
Ownership / control type
Private (for profit)
Most recent change of ownership
May 1, 2025 (2 total)
Organization structure
GovernmentNon-profit
Enrollment address
161 River Oaks Dr
Canton, MS 39046-5375
Main/Primary Hospital Location
Hospital subgroups
Acute care

Facilities connected through Provider of Services related, parent or unit certification numbers.

Other NPIs with the same Medicare PAC ID 22

NPIs whose Medicare enrollments share a PECOS associate control ID (the same enrolled entity).

View all 22

Care Compare: Hospital

Medicare Care Compare
Listed as
Merit Health MadisonCCN 250038 · All quality measures
Overall star rating
3 of 5
Type
Acute Care Hospitals
Ownership
Proprietary
Medicare certification status
ActiveFrom the Provider of Services file
Emergency services
Yes

National Provider Directory

National Provider Directory
Tax ID family
Sigurds O Krolls MD62 organizations share this tax ID, including this one
Part of
Sigurds O Krolls MD

Organizations with this tax ID in the same state 16

This tax ID family is large, so up to 24 of its organizations in the same state are linked here.

View all 16

Member of 1

Organizations this organization is a member of, according to the National Provider Directory.

Ownership & related parties

All disclosed owners & managing parties 4

As disclosed on the Medicare enrollment (CMS All Owners files). Individuals include officers, directors and managing employees, who may not hold ownership.

NameRoleSinceShare
Jeffrey G Grimsley Individual W-2 Managing EmployeeAssociate Cfo May 1, 2025
State of Mississippi-University of Mississippi Medical Center Organization, Jackson, MS Chain home office 5% Or Greater Direct Ownership Interest May 1, 2025 100%
Britton Phelps Individual W-2 Managing EmployeeExecutive Administrator - Madison May 1, 2025
Dodie McElmurray Individual W-2 Managing EmployeeCeo May 1, 2025

Owners & managing parties with NPI records 22

Owners and managing parties disclosed on this facility’s Medicare enrollment that are themselves Medicare-enrolled.

View all 22

All facility ownership & control disclosures 14

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

FacilityTypeRoleSince
State of Mississippi-University of Mississippi Medical CenterJackson, MS, CCN 250001 Hospital 5% Or Greater Direct Ownership Interest
Operational/Managerial Control		 Jul 1, 2007
Jul 1, 2007
University of Mississi Medical Center- Holmes CountyLexington, MS, CCN 25Z319 Hospital 5% Or Greater Direct Ownership Interest Jan 1, 2004
Holmes County Hospital & ClinicsLexington, MS, CCN 251319 Hospital 5% Or Greater Direct Ownership Interest Oct 1, 2004
Ummc- GrenadaGrenada, MS, CCN 250168 Hospital 5% Or Greater Direct Ownership Interest (100%)
Operational/Managerial Control		 Feb 21, 2014
Feb 21, 2014
Ummc MadisonCanton, MS, CCN 25U038 Hospital 5% Or Greater Direct Ownership Interest (100%) May 1, 2025
Lexington Rural Health ClinicLexington, MS, CCN 253813 Rural health clinic 5% Or Greater Direct Ownership Interest May 23, 2013
West Rural Health ClinicWest, MS, CCN 253812 Rural health clinic 5% Or Greater Direct Ownership Interest May 22, 2013
Ummc- Grenada Women's ServicesGrenada, MS, CCN 258626 Rural health clinic 5% Or Greater Direct Ownership Interest Jan 1, 2014
Holmes County Family Medicine Clinic- VaidenVaiden, MS, CCN 258625 Rural health clinic 5% Or Greater Direct Ownership Interest Oct 1, 2016
Ummc Grenada Specialty PediatricsGrenada, MS, CCN 258627 Rural health clinic 5% Or Greater Direct Ownership Interest Jan 1, 2014
Children's of Mississippi Greenwood ClinicGreenwood, MS, CCN 258682 Rural health clinic 5% Or Greater Direct Ownership Interest Oct 1, 2023
Ummc Greenwood Primary Care ClinicGreenwood, MS, CCN 258679 Rural health clinic 5% Or Greater Direct Ownership Interest Oct 1, 2023
Ummc Greenwood Women's ClinicGreenwood, MS, CCN 258680 Rural health clinic 5% Or Greater Direct Ownership Interest Oct 1, 2023
Ummc Grenada Primary Medicine ClinicGrenada, MS, CCN 258681 Rural health clinic 5% Or Greater Direct Ownership Interest Oct 1, 2023

Owned or controlled facilities with NPI records 15

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

View all 15

Facilities with the same owner 14

Facilities that share an organizational owner with 5% or greater ownership or operational control.

View all 14

Practitioners & affiliated clinicians

Practitioners 8

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

Affiliated clinicians 186

Clinicians who list this facility as an affiliation in Medicare Care Compare.

View all 186

NPI Registry JSON

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

{
    "created_epoch": "1148428800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1771545600000",
    "number": "1194770404",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "504 CLINTON CENTER DR STE 4100",
            "city": "CLINTON",
            "state": "MS",
            "postal_code": "390565610",
            "telephone_number": "601-815-6381",
            "fax_number": "601-855-5100"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "161 RIVER OAKS DRIVE",
            "city": "CANTON",
            "state": "MS",
            "postal_code": "390465375",
            "telephone_number": "601-496-5500",
            "fax_number": "601-855-5100"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "STATE OF MISSISSIPPI - UNIVERSITY OF MISSISSIPPI MEDICAL CENTER",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "STATE OF MISSISSIPPI - UNIVERSITY OF MISSISSIPPI MEDICAL CENTER",
        "enumeration_date": "2006-05-24",
        "last_updated": "2026-02-20",
        "certification_date": "2026-02-20",
        "status": "A",
        "authorized_official_last_name": "GRIMSLEY",
        "authorized_official_first_name": "JEFFREY",
        "authorized_official_title_or_position": "ASSOCIATE CFO",
        "authorized_official_telephone_number": "601-815-6270"
    },
    "taxonomies": [
        {
            "code": "282N00000X",
            "taxonomy_group": "",
            "desc": "General Acute Care Hospital",
            "state": "MS",
            "license": "16243",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Merit Health Madison",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "UMMC - Madison",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Canton, MS

Sources for this page

Verify at the official NPI Registry.