Individual provider Active NPI

Tuan T. Lam, M.D.

  • Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
  • Fountain Valley, CA
National Provider Identifier
1124290713
Registry record updated May 8, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianTaxonomy code 208G00000X
License
A69720 Issued in CA
Practice address
18035 Brookhurst St Ste 1300
Fountain Valley, CA 92708-6738
Phone
(657) 241-9440
NPI assigned
Mar 24, 2008
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on May 8, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X 0101102688 VA
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X A69720 CA Primary

Addresses

Primary practice location

18035 Brookhurst St Ste 1300
Fountain Valley, CA 92708-6738

Mailing address

10152 Cowan Heights Dr
Santa Ana, CA 92705-1597
Phone (714) 824-9662

Other practice location 1

2660 W Sugnet Rd
Midland, MI 48640-2647
Phone (998) 979-4520

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA, IA, VA, MI4 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 4

Enrollment IDStateProvider typePAC IDDetails
I20090512000032 CA Practitioner - Cardiovascular Disease (Cardiology) 1456409929 Reassigns benefits to 2 organizations
I20221026003084 IA Practitioner - Thoracic Surgery 1456409929
I20231227000276 VA Practitioner - Thoracic Surgery 1456409929 Reassigns benefits to 2 organizations
I20241001003581 MI Practitioner - Thoracic Surgery 1456409929 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Cardiovascular Disease (Cardiology)
Education
Johns Hopkins University School of Medicine, 1997
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Memorialcare Medical FoundationGroup PAC ID 8729277314, 555 clinicians
Mymichigan Medical Center MidlandGroup PAC ID 2264323633, 507 clinicians

Practice addresses (Care Compare)

18035 Brookhurst St
Suite 1300
Fountain Valley, CA 92708-6738
Phone (562) 988-9333

2660 W Sugnet Rd
Mymichigan Vascular Surgery
Midland, MI 48640-2647
Phone (989) 832-0900

Hospital & facility affiliations

  • Memorialcare Orange Coast Medical Center Hospital, Fountain Valley, CA, CCN 050678
  • Mymichigan Medical Center Midland Hospital, Midland, MI, CCN 230222
  • Memorialcare Saddleback Medical Center Hospital, Laguna Hills, CA, CCN 050603

Merit-based Incentive Payment System (MIPS)

Final score
100 of 100Reported as apm
Quality
85.92
Promoting interoperability
100
Improvement activities
40

Merit-based Incentive Payment System (MIPS)

Final score
87.17 of 100Reported as group
Quality
81.15
Promoting interoperability
100
Improvement activities
40
Cost
71.64

Procedures performed for Medicare patients

ProcedureNumber of procedures
Coronary artery bypass graft (CABG)36

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
69720CAMDAmbulatory Care Pharmacist
A69720CAMDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician

Practice roles (27 of 28)

OrganizationSpecialtyStatusNew patients
Mymichigan Medical Center Saginaw Current Accepting new patients
Mymichigan Medical Center Midland CurrentSince Nov 4, 2024 Accepting new patients
Mymichigan Medical Center Saginaw Thoracic Surgery (Cardiothoracic Vascular Surgery) CurrentSince Nov 1, 2025 Accepting new patients
Mymichigan Medical Center Saginaw CurrentSince Nov 1, 2025 Accepting new patients
Mymichigan Medical Center Midland CurrentSince Nov 4, 2024 Accepting new patients
Mymichigan Medical Center Saginaw Current Accepting new patients
Bon Secours Medical Group Hampton Roads Specialty Care LLC Thoracic Surgery (Cardiothoracic Vascular Surgery) CurrentSince Feb 1, 2024 Accepting new patients
Bon Secours Medical Group Hampton Roads Specialty Care LLC CurrentSince Feb 1, 2024 Accepting new patients
Bon Secours Medical Group Richmond Specialty Care LLC CurrentSince Dec 16, 2023 Accepting new patients
Bon Secours Medical Group Richmond Specialty Care LLC CurrentSince Dec 16, 2023 Accepting new patients
Mymichigan Medical Center Midland Past Accepting new patients
Children'S Hospital of Orange County Past Accepting new patients
Ahmc Garfield Medical Center LP Past Accepting new patients
Mission Hospital Regional Medical Center Past Accepting new patients
Orange Coast Memorial Medical Center Past Accepting new patients
Bristol Park Medical Group, Inc Past Accepting new patients
Bon Secours St. Mary'S Hospital of Richmond LLC Past Accepting new patients
Saddleback Memorial Medical Center Past Accepting new patients
Anaheim Memorial Medical Center Past Accepting new patients
Children'S Hospital at Mission Past Accepting new patients
St Jude Hospital Inc Past Accepting new patients
Hoag Memorial Hospital Presbyterian Past Accepting new patients
St. Joseph Hospital Specialist Past Accepting new patients
St Joseph Hospital of Orange Past Accepting new patients
Long Beach Memorial Medical Past Accepting new patients
Mymichigan Medical Center Saginaw Past Accepting new patients
Long Beach Memorial Medical Past Accepting new patients

Locations

1117 S Van Dyke Rd
Ste 300
Bad Axe, MI 48413

4000 Wellness Dr
Midland, MI 48670
Phone (844) 832-1956

2660 W Sugnet Rd
Midland, MI 48640
Phone (989) 488-5010

4500 N Campus Ridge Dr
Midland, MI 48640
Phone (989) 837-9250

3570 Shattuck Rd
Saginaw, MI 48603
Phone (989) 792-5353

1015 S Washington Ave
Saginaw, MI 48601
Phone (989) 754-3289

150 Kingsley Ln
Norfolk, VA 23505
Phone (757) 464-6944

1510 N 28th St
Ste 110
Richmond, VA 23223
Phone (804) 545-2304

Networks

  • BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

  • Direct secure messaging: tlam21207@direct.memorialcare.org

Organizations & group practices 34

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.

View all 34

Hospital & facility affiliations 5

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

NPI Registry JSON

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

{
    "created_epoch": "1206316800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778198400000",
    "number": "1124290713",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "10152 COWAN HEIGHTS DR",
            "city": "SANTA ANA",
            "state": "CA",
            "postal_code": "927051597",
            "telephone_number": "714-824-9662"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "18035 BROOKHURST ST STE 1300",
            "city": "FOUNTAIN VALLEY",
            "state": "CA",
            "postal_code": "927086738",
            "telephone_number": "657-241-9440"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2660 W Sugnet Rd",
            "address_purpose": "LOCATION",
            "city": "Midland",
            "state": "MI",
            "postal_code": "486402647",
            "country_code": "US",
            "telephone_number": "998-979-4520",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LAM",
        "first_name": "TUAN",
        "middle_name": "T.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2008-03-24",
        "last_updated": "2026-05-08",
        "certification_date": "2026-05-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "VA",
            "license": "0101102688",
            "primary": false
        },
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "CA",
            "license": "A69720",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Fountain Valley, CA

Sources for this page

Verify at the official NPI Registry.