Justin Huynh, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

2009029861 Issued in MO

Practice address

4460 S Lindbergh Blvd
Saint Louis, MO 63127-1647

Phone

(314) 843-7557

Fax

(314) 849-8671

NPI assigned

Jul 29, 2007

Last updated

Mar 31, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in MO, AR2 enrollments

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 2

Specialty

Internal Medicine

Education

Indiana University School of Medicine, 2007

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Mercy Clinic East CommunitiesGroup PAC ID 7214827922, 573 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mercy Home Health Home health agency, Saint Louis, MO, CCN 267253
• Mercy Home Health Home health agency, Saint Louis, MO, CCN 267565
• Mercy Hospital South Hospital, Saint Louis, MO, CCN 260077
• Mercy Hospital St Louis Hospital, Saint Louis, MO, CCN 260020
• Missouri Baptist Medical Center Hospital, Saint Louis, MO, CCN 260108

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jhuynh127374@directc.mercy.net

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.

• Mercy Clinic East Communities

  • Internal Medicine Physician
  • Saint Louis, MO
  • NPI 1851335228
  Medicare reassignment Care Compare group
• Mercy Health Northwest Arkansas Communities

  • Multi-Specialty Clinic/Center
  • Rogers, AR
  • NPI 1265490916
  Medicare reassignment NPD
• Mercy Aco Clinical Services Inc

  • Neurology Physician
  • Chesterfield, MO
  • NPI 1063965093
  Medicare reassignment
• Oak Street Health Physicians Group of Missouri, LLC

  • Primary Care Clinic/Center
  • Saint Louis, MO
  • NPI 1669041760

  Internal Medicine

  NPD
• Mercy Health Northwest Arkansas Communities

  • Endocrinology, Diabetes & Metabolism Physician
  • Rogers, AR
  • NPI 1699016774
  NPD
• Mercy Health Northwest Arkansas Communities

  • Endocrinology, Diabetes & Metabolism Physician
  • Rogers, AR
  • NPI 1770087371
  NPD
• Oak Street Health Physicians Group, PC

  • Primary Care Clinic/Center
  • Chicago, IL
  • NPI 1083051643

  Internal Medicine

  NPD (past)

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

• Mercy Hospital South

  dba Mercy Home Health

  • Home Health Agency
  • Saint Louis, MO
  • NPI 1053314179
  Care Compare affiliation Name & address match
• Mercy Health Services LLC

  dba Mercy Home Health

  • Home Health Agency
  • Saint Louis, MO
  • NPI 1154407112
  Care Compare affiliation
• Mercy Hospital South

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1568481984
  Care Compare affiliation
• Mercy Hospitals East Communities

  dba Mercy Hospital St Louis

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1427098169
  Care Compare affiliation
• Mercy Hospitals East Communities

  dba Mercy St. Louis Transport Ambulance

  • Land Ambulance
  • Saint Louis, MO
  • NPI 1881329902

  Hospital

  Care Compare affiliation
• Missouri Baptist Medical Center

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1487663506
  Care Compare affiliation

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

{
    "created_epoch": "1185667200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774915200000",
    "number": "1902096613",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4460 S LINDBERGH BLVD",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631271647",
            "telephone_number": "314-843-7557",
            "fax_number": "314-849-8671"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4460 S LINDBERGH BLVD",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631271647",
            "telephone_number": "314-843-7557",
            "fax_number": "314-849-8671"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "16659 E 23rd St S",
            "address_purpose": "LOCATION",
            "city": "Independence",
            "state": "MO",
            "postal_code": "640551922",
            "country_code": "US",
            "telephone_number": "816-688-6000",
            "fax_number": "816-631-1885",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3451 Union Blvd",
            "address_purpose": "LOCATION",
            "city": "Saint Louis",
            "state": "MO",
            "postal_code": "631151142",
            "country_code": "US",
            "telephone_number": "314-888-0970",
            "fax_number": "314-408-7063",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "15740 S Outer 40 Rd",
            "address_purpose": "LOCATION",
            "city": "Chesterfield",
            "state": "MO",
            "postal_code": "630172004",
            "country_code": "US",
            "telephone_number": "636-735-4205",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4460 S Lindbergh Blvd",
            "address_purpose": "LOCATION",
            "city": "Saint Louis",
            "state": "MO",
            "postal_code": "631271647",
            "country_code": "US",
            "telephone_number": "314-843-7557",
            "fax_number": "314-849-8671",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4460 S Lindbergh Blvd",
            "address_purpose": "LOCATION",
            "city": "Saint Louis",
            "state": "MO",
            "postal_code": "631271647",
            "country_code": "US",
            "telephone_number": "314-843-7557",
            "fax_number": "314-849-8671",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3863A Gravois Ave",
            "address_purpose": "LOCATION",
            "city": "Saint Louis",
            "state": "MO",
            "postal_code": "631164657",
            "country_code": "US",
            "telephone_number": "314-888-0981",
            "fax_number": "314-442-7794",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "8033 W Florissant Ave Ste A",
            "address_purpose": "LOCATION",
            "city": "Jennings",
            "state": "MO",
            "postal_code": "631361412",
            "country_code": "US",
            "telephone_number": "314-888-0971",
            "fax_number": "314-408-7062",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "10024 Watson Rd",
            "address_purpose": "LOCATION",
            "city": "Saint Louis",
            "state": "MO",
            "postal_code": "631261829",
            "country_code": "US",
            "telephone_number": "314-919-2500",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HUYNH",
        "first_name": "JUSTIN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-07-29",
        "last_updated": "2026-03-31",
        "certification_date": "2026-03-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MO",
            "license": "2009029861",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mary Elizabeth Hutson, CPNP
• Sandra Jean Hutson, RN MONTRICE
• Trinis Hutson
• Catherine C Hutter, PH.D.
• Dong Huynh
• Michelle Ashley Huynh, ACNP
• Quyen Ngoc Huynh, PHARMD
• Sophia Hoang-Vy Huynh, PHARMD
• Tony Duc Huynh, MD
• Ut Huynh

• Internal Medicine Physician in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Internal Medicine Physician in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 31, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.