NPIMap

Organization Active NPI

Mason Ridge Ambulatory Surgery Center LP

Doing business as Gateway Endoscopy Center

  • Ambulatory Surgical Clinic/Center
  • Chesterfield, MO
National Provider Identifier
1821453796
Registry record updated Jul 28, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Ambulatory Surgical Clinic/CenterTaxonomy code 261QA1903X
Legal business name
MASON RIDGE AMBULATORY SURGERY CENTER LP
Doing business as
Gateway Endoscopy Center
Practice address
17298 North Outer 40 Road
Suite 100
Chesterfield, MO 63005
Phone
(314) 336-1130
Fax
(314) 336-1136
NPI assigned
Dec 21, 2015
Last updated
Jul 28, 2026By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Jul 28, 2026

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

Authorized official

Name
Erica Wehrmeister
Title
Officer/Authorized Official
Phone
(260) 760-9420

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Ambulatory Surgical Clinic/Center 261QA1903X Primary

Addresses

Primary practice location

17298 North Outer 40 Road
Suite 100
Chesterfield, MO 63005

Mailing address

17298 North Outer 40 Road
Suite 100
Chesterfield, MO 63005
Phone (314) 336-1130

Other names 1

  • Gateway Endoscopy Center Doing business as

Electronic endpoints 1

TypeEndpointUseAffiliation
CONNECT URL https://esmd.abilitynetwork.com:8291/gateway/documentsubmission/2_0/NhinService/XDRRequest_Service Other Ability Network

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20160205002041 MO Part B Supplier - Ambulatory Surgical Center 4981708187 Practice locations: St Louis, MO

National Provider Directory

National Provider Directory

Member of 3

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

Locations

17298 North Outer 40 Rd
Ste 100
Chesterfield, MO 63005
Phone (314) 336-1130

12855 N 40 Dr
Ste 1
Saint Louis, MO 63141
Phone (314) 336-1130

12855 N 40 Dr
Ste 150
Saint Louis, MO 63141
Phone (314) 336-1130

Practitioners & affiliated clinicians

Practitioners 23

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.

View all 23

NPI Registry JSON

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

{
    "created_epoch": "1450656000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1785196800000",
    "number": "1821453796",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "17298 NORTH OUTER 40 ROAD",
            "address_2": "SUITE 100",
            "city": "CHESTERFIELD",
            "state": "MO",
            "postal_code": "63005",
            "telephone_number": "314-336-1130",
            "fax_number": "314-336-1136"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "17298 NORTH OUTER 40 ROAD",
            "address_2": "SUITE 100",
            "city": "CHESTERFIELD",
            "state": "MO",
            "postal_code": "63005",
            "telephone_number": "314-336-1130",
            "fax_number": "314-336-1136"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MASON RIDGE AMBULATORY SURGERY CENTER LP",
        "organizational_subpart": "NO",
        "enumeration_date": "2015-12-21",
        "last_updated": "2026-07-28",
        "certification_date": "2026-07-28",
        "status": "A",
        "authorized_official_last_name": "WEHRMEISTER",
        "authorized_official_first_name": "ERICA",
        "authorized_official_title_or_position": "OFFICER/AUTHORIZED OFFICIAL",
        "authorized_official_telephone_number": "260-760-9420"
    },
    "taxonomies": [
        {
            "code": "261QA1903X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Ambulatory Surgical",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "CONNECT",
            "endpointTypeDescription": "CONNECT URL",
            "endpoint": "https://esmd.abilitynetwork.com:8291/gateway/documentsubmission/2_0/NhinService/XDRRequest_Service",
            "affiliation": "Y",
            "endpointDescription": "2.16.840.1.113883.3.667.2",
            "affiliationName": "Ability Network",
            "use": "OTHER",
            "useDescription": "Other",
            "useOtherDescription": "CMS esMD eMDR",
            "address_1": "100 N 6th St Ste 900A",
            "city": "Minneapolis",
            "state": "MN",
            "country_code": "US",
            "postal_code": "554031516",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": [
        {
            "organization_name": "Gateway Endoscopy Center",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "Gateway Endoscopy Center",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Chesterfield, MO

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 28, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.