Alan Siu, MD

Primary specialty

Neurological Surgery PhysicianTaxonomy code 207T00000X

License

A154304 Issued in CA

Practice address

300 Hillmont Ave
BLDG 340, Ste 401
Ventura, CA 93003

Phone

(805) 648-9830

Fax

(805) 648-9833

NPI assigned

Jun 16, 2009

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

Other identifiers 1

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in CA, HI2 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

Neurosurgery

Education

Clvlnd Clinic Lerner College of Med of Case WSTN RSV University, 2009

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Amg a Professional Medical CorporationGroup PAC ID 9830092279, 27 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Garfield Medical Center Hospital, Monterey Park, CA, CCN 050737
• San Gabriel Valley Medical Center Hospital, San Gabriel, CA, CCN 050132
• Alhambra Hospital Medical Center Hospital, Alhambra, CA, CCN 050281

Merit-based Incentive Payment System (MIPS)

Final score

86.02 of 100Reported as group

Quality

64.51

Promoting interoperability

100

Improvement activities

40

Cost

72.21

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: alan.siu@ventura.cernerdirect.com

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.

• Alan Siu MD Inc

  • Neurological Surgery Physician
  • Alhambra, CA
  • NPI 1427880996
  Medicare reassignment NPD Authorized official
• Amg, a Professional Medical Corporation

  • Internal Medicine Physician
  • Alhambra, CA
  • NPI 1558306266
  Medicare reassignment Care Compare group NPD
• County of Ventura

  dba Ventura County Medical Center

  • General Acute Care Hospital
  • Ventura, CA
  • NPI 1629167457
  Medicare reassignment NPD
• Hilo Benioff Medical Center

  • General Acute Care Hospital
  • Hilo, HI
  • NPI 1962584060
  Medicare reassignment NPD
• Neurosurgery Consultants Inc

  • Neurological Surgery Physician
  • Alhambra, CA
  • NPI 1326911199
  NPD Authorized official
• Ajk Perioperative Nursing Services Incorporated

  • Registered Nurse First Assistant
  • Agoura Hills, CA
  • NPI 1174195085
  NPD
• Arthur PO-Fei Chou MD Inc

  • Neurological Surgery Physician
  • Monterey Park, CA
  • NPI 1538549654
  NPD
• County of Ventura

  dba Conejo Valley Family Medical Group FQHC

  • Federally Qualified Health Center (FQHC)
  • Thousand Oaks, CA
  • NPI 1316188253
  NPD
• County of Ventura

  dba VCBH - Simi Valley Youth & Family Mental Health

  • Community/Behavioral Health Agency
  • Simi Valley, CA
  • NPI 1609098243
  NPD
• Hilo Benioff Medical Center

  • Anesthesiology Physician
  • Hilo, HI
  • NPI 1235981614
  NPD
• County of Ventura

  dba Nueroscience Center West

  • Clinic/Center
  • Ventura, CA
  • NPI 1598155640
  NPD (past)
• County of Ventura

  dba Moorpark Family Medical Group / Moorpark College

  • Student Health Clinic/Center
  • Moorpark, CA
  • NPI 1912306317
  NPD (past)

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

• Ahmc Garfield Medical Center LP

  dba Garfield Medical Center

  • General Acute Care Hospital
  • Monterey Park, CA
  • NPI 1730171265
  Care Compare affiliation
• Ahmc San Gabriel Valley Medical

  dba AHMC San Gabreil Valley Medical Center, LP

  • General Acute Care Hospital
  • San Gabriel, CA
  • NPI 1275720377
  Care Compare affiliation
• Alhambra Hospital Medical Center, LP

  • General Acute Care Hospital
  • Alhambra, CA
  • NPI 1770612756
  Care Compare affiliation

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

{
    "created_epoch": "1245110400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769731200000",
    "number": "1306073457",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3154 GLENDALE BLVD # 1216",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900391830",
            "telephone_number": "571-249-3327",
            "fax_number": "805-677-5304"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 HILLMONT AVE",
            "address_2": "BLDG 340, STE 401",
            "city": "VENTURA",
            "state": "CA",
            "postal_code": "93003",
            "telephone_number": "805-648-9830",
            "fax_number": "805-648-9833"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIU",
        "first_name": "ALAN",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2009-06-16",
        "last_updated": "2026-01-30",
        "certification_date": "2026-01-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "HI",
            "license": "MD-23719",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "CA",
            "license": "A154304",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CONTROLLED SUBSTANCE",
            "identifier": "CP0600324-AS445",
            "state": "DC"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "alan.siu@ventura.cernerdirect.com",
            "affiliation": "N",
            "endpointDescription": "Cerner Direct Secure Email",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "Direct Information",
            "address_1": "300 Hillmont Ave",
            "address_2": "Bldg 340, Ste 401",
            "city": "Ventura",
            "state": "CA",
            "country_code": "US",
            "postal_code": "93003",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Nugdeep Singh, M.D.
• Vivek Singh, DDS
• Monica Teresa Sinsun
• Iman Sionit, PHARM D
• Annie Grace Siroky, LM, CPM
• Ranjini M Sivaramakrishnan, D.D.S.
• Christopher Shawn Skillern, MD
• Giti Skolnick, RN
• Kristopher Robert Skromme, O.D.
• Evan Slater, M.D.

• Neurological Surgery Physician in Ventura, CA
• Providers in Ventura, CA by specialty
• Neurological Surgery Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 30, 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.