NPIMap

Individual provider Active NPI

Michael William Nash, M.D.

  • Family Medicine Physician
  • Saint Louis, MO
National Provider Identifier
1376577825
Registry record updated Jul 21, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
2017029652 Issued in MO
Practice address
3637 S Geyer Rd
Saint Louis, MO 63127-1203
Phone
(314) 525-1887
Fax
(314) 525-1868
NPI assigned
Jul 10, 2006
Last updated
Jul 21, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 21, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Family Medicine Physician 207Q00000X 2017029652 MO Primary
Family Medicine Physician 207Q00000X 036-115521 IL

Addresses

Primary practice location

3637 S Geyer Rd
Saint Louis, MO 63127-1203

Mailing address

3637 S Geyer Rd
Saint Louis, MO 63127-1203
Phone (314) 525-1887

Other practice location 1

901 Patients First Dr Ste 2742
Washington, MO 63090-4700
Phone (636) 239-8825

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL, MO2 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
I20070212000373 IL Practitioner - Family Practice 8325040942
I20170907000777 MO Practitioner - Family Practice 8325040942 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Family Practice
Education
Saint Louis University School of Medicine, 2003
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Mercy Clinic East CommunitiesGroup PAC ID 7214827922, shared by 6 NPIs, 573 clinicians

Practice addresses (Care Compare)

901 Patients 1St Dr
Suite 2742
Washington, MO 63090-4700
Phone (636) 239-8825

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
036-115521ILMDFamily Medicine Physician
2017029652MOMDFamily Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Mercy Clinic East Communities Family Medicine Current Accepting new patients
Mercy Clinic East Communities Family Medicine CurrentSince Jan 6, 2025 Accepting new patients
Physician Groups LC Family Medicine CurrentSince May 3, 2023 Accepting new patients
Physician Groups LC CurrentSince May 3, 2023 Accepting new patients
Mercy Clinic East Communities Family Medicine CurrentSince Oct 2, 2017 Accepting new patients
Community Care Ctr of Sullivan, Inc Past Accepting new patients
Pacific Manor LLC Past Accepting new patients
Bel Oak of Meramec LLC Past Accepting new patients
Cuba Manor, Inc. Past Accepting new patients
Sullivan Operations, LLC Past Accepting new patients
Bethesda Long Term Care, Inc. Past Accepting new patients
Delmar Gardens North Operating, LLC Past Accepting new patients
Washington N & R, LLC Past Accepting new patients
Crystal Oaks Nursing and Rehab LLC Past Accepting new patients

Locations

1 Memorial Dr
Alton, IL 62002
Phone (618) 463-7240

4315 Memorial Dr
Belleville, IL 62226
Phone (618) 257-5060

2630 Highway K
O Fallon, MO 63368
Phone (636) 240-5454

3009 N Ballas Rd
Ste 383C
Saint Louis, MO 63131
Phone (314) 305-1447

3637 S Geyer Rd
Saint Louis, MO 63127
Phone (314) 251-4659

621 S New Ballas Rd
Ste 189A
Saint Louis, MO 63141
Phone (314) 251-6335

621 S New Ballas Rd
Ste 4017B
Saint Louis, MO 63141
Phone (314) 872-9192

621 S New Ballas Rd
Ste 6017B
Saint Louis, MO 63141
Phone (314) 251-4652

851 E 5th St
Ste 328
Washington, MO 63090
Phone (636) 239-1101

901 Patients First Dr
Ste 2742
Washington, MO 63090
Phone (636) 239-8825

Interoperability endpoints

  • Direct secure messaging: micael.nash@ccrh.directbygreenway.com

Ownership & related parties

All facility ownership & control disclosures 2

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

FacilityTypeRoleSince
Crystal OaksFestus, MO, CCN 265369 Skilled nursing facility Operational/Managerial Control
Adp of the SNF		 Dec 1, 2022
Jul 21, 2025
St. Peters Post AcuteSaint Peters, MO, CCN 265824 Skilled nursing facility Operational/Managerial Control
Adp of the SNF		 Mar 1, 2024
Mar 1, 2024

Owned or controlled facilities with NPI records 2

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

Organizations & group practices 14

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.

View all 14

Hospital & facility affiliations 16

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

View all 16

NPI Registry JSON

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

{
    "created_epoch": "1152489600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784592000000",
    "number": "1376577825",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3637 S GEYER RD",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631271203",
            "telephone_number": "314-525-1887",
            "fax_number": "314-525-1868"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3637 S GEYER RD",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631271203",
            "telephone_number": "314-525-1887",
            "fax_number": "314-525-1868"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "901 Patients First Dr Ste 2742",
            "address_purpose": "LOCATION",
            "city": "Washington",
            "state": "MO",
            "postal_code": "630904700",
            "country_code": "US",
            "telephone_number": "636-239-8825",
            "fax_number": "636-390-5595",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NASH",
        "first_name": "MICHAEL",
        "middle_name": "WILLIAM",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-10",
        "last_updated": "2026-07-21",
        "certification_date": "2026-07-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "MO",
            "license": "2017029652",
            "primary": true
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "IL",
            "license": "036-115521",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Saint Louis, MO

Sources for this page

Verify at the official NPI Registry.