Stephen T. Nguyen, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

D0063163 Issued in MD

Practice address

4 Professional Dr Ste 133
Gaithersburg, MD 20879-3426

Phone

(301) 974-9625

NPI assigned

Dec 19, 2006

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 DC

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 1

Specialty

Internal Medicine

Education

Other, 2001

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Practice addresses (Care Compare)

Hospital & facility affiliations

• Adventist Home Health Services, Inc. Home health agency, Silver Spring, MD, CCN 217032
• Amedisys Home Health Care Home health agency, Largo, MD, CCN 217149
• Adventist Healthcare Shady Grove Medical Center Hospital, Rockville, MD, CCN 210057

Merit-based Incentive Payment System (MIPS)

Final score

25.63 of 100Reported as individual

Quality

0

Improvement activities

0

Cost

85.44

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

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.

• Thien Long, LLC

  • Internal Medicine Physician
  • Gaithersburg, MD
  • NPI 1174801609

  DC

  Medicare reassignment Authorized official
• Adventist Healthcare, Inc.

  dba Adventist HealthCare Shady Grove Medical Center

  • General Acute Care Hospital
  • Rockville, MD
  • NPI 1568468221
  NPD (past)
• Frederick Health Hospital Inc

  dba Frederick Health Hospital

  • General Acute Care Hospital
  • Frederick, MD
  • NPI 1538165527
  NPD (past)

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

• Adventist Home Health Services Inc

  • Home Health Agency
  • Silver Spring, MD
  • NPI 1598826448
  Care Compare affiliation Name & address match
• Adventist Healthcare, Inc.

  dba Adventist HealthCare Shady Grove Medical Center

  • General Acute Care Hospital
  • Rockville, MD
  • NPI 1568468221
  Care Compare affiliation
• Amedisys Home Health of Maryland, LLC

  dba Amedisys Home Health Care

  • Home Health Agency
  • Largo, MD
  • NPI 1831143908
  Care Compare affiliation

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

{
    "created_epoch": "1166486400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755129600000",
    "number": "1265596050",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4 PROFESSIONAL DR STE 133",
            "city": "GAITHERSBURG",
            "state": "MD",
            "postal_code": "208793426",
            "telephone_number": "301-974-9625"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4 PROFESSIONAL DR STE 133",
            "city": "GAITHERSBURG",
            "state": "MD",
            "postal_code": "208793426",
            "telephone_number": "301-974-9625"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NGUYEN",
        "first_name": "STEPHEN",
        "middle_name": "T.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-12-19",
        "last_updated": "2025-08-14",
        "certification_date": "2025-08-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MD",
            "license": "D0063163",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Hang Thanh Nguyen, DDS
• Heather Minh Nguyen, D.D.S
• Huy Nguyen, DMD
• Nhat Thanh Nguyen, PHARMD
• Sammy Nguyen
• Yan Ni, PSYD
• Homa Julie Niazi, O.D.
• Karalynn Nichols
• Joseph James Nicol, M.A.
• Nicole Asbahr, M.Ac, L.Ac, Licensed Acupuncturist (Inner Nature Acupuncture)

• Internal Medicine Physician in Gaithersburg, MD
• Providers in Gaithersburg, MD by specialty
• Internal Medicine Physician in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 14, 2025; 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.