Yih-Dar Nien, MD

Primary specialty

Surgery PhysicianTaxonomy code 208600000X

License

A101665 Issued in CA

Practice address

15503 Ventura Blvd Ste 240
Encino, CA 91436-3162

Phone

(818) 461-3321

NPI assigned

May 9, 2007

Sex

Male

Sole proprietor

No

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 CA

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

General Surgery

Education

Other, 2001

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

UCLA Associated General SurgeonsGroup PAC ID 6002728144, 46 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Henry Mayo Newhall Hospital Hospital, Valencia, CA, CCN 050624
• Ronald Reagan UCLA Medical Center Hospital, Los Angeles, CA, CCN 050262

Merit-based Incentive Payment System (MIPS)

Final score

92.8 of 100Reported as group

Quality

78.51

Promoting interoperability

100

Improvement activities

40

Cost

70.37

Merit-based Incentive Payment System (MIPS)

Final score

92.77 of 100Reported as group

Quality

69.77

Promoting interoperability

100

Improvement activities

40

Cost

82.11

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: ynien1271214@direct.uclahealth.org
• Direct secure messaging: ynien10171@cityofhope.direct-ci.com

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.

• UCLA Associated General Surgeons

  • Surgery Physician
  • Los Angeles, CA
  • NPI 1730147372
  Medicare reassignment Care Compare group NPD
• City of Hope Medical Foundation

  • Hematology & Oncology Physician
  • Duarte, CA
  • NPI 1871886366

  Surgery

  Medicare reassignment NPD
• California Cancer Specialists Medical Group Inc

  • Anesthesiology Physician
  • Duarte, CA
  • NPI 1912006636

  Surgery

  NPD (past)
• UCLA Associated General Surgeons

  • Surgery Physician
  • Santa Monica, CA
  • NPI 1821056458
  NPD (past)
• UCLA Medical Group

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1043427248

  Surgery

  NPD (past)

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

• Henry Mayo Newhall Memorial Hospital

  • General Acute Care Hospital
  • Valencia, CA
  • NPI 1780668434
  Care Compare affiliation
• Regents Univ of Calif Los Angeles

  • General Acute Care Hospital
  • Los Angeles, CA
  • NPI 1902803315
  Care Compare affiliation

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

{
    "created_epoch": "1178668800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1741219200000",
    "number": "1164636262",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5767 W CENTURY BLVD STE 400",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900455631"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "15503 VENTURA BLVD STE 240",
            "city": "ENCINO",
            "state": "CA",
            "postal_code": "914363162",
            "telephone_number": "818-461-3321"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "27235 Tourney Rd Ste 2200",
            "address_purpose": "LOCATION",
            "city": "Valencia",
            "state": "CA",
            "postal_code": "913555905",
            "country_code": "US",
            "telephone_number": "661-219-2643",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NIEN",
        "first_name": "YIH-DAR",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-05-09",
        "last_updated": "2025-03-06",
        "certification_date": "2025-03-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "CA",
            "license": "A101665",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Lacey Lee Nickerson, MS, CCP
• Florin Nicodim, COTA
• Nicole Gershenson Marriage and Family Therapist Inc
• Nicole Makowka
• Joseph John Nicolosi Jr., PH.D.
• Nikaeen Chiropractic P.C
• Pantea Nikaeen
• Nooshin Niknam, PHARM.D
• Levon Nikoghosyan
• Jennifer Marie Niles, M.S., MFT

• Surgery Physician in Encino, CA
• Providers in Encino, CA by specialty
• Surgery Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 6, 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.