Seija Maniskas, MD, MS

Primary specialty

Colon & Rectal Surgery PhysicianTaxonomy code 208C00000X

License

A187429 Issued in CA

Practice address

1100 San Bernardino Rd Ste 1100
Upland, CA 91786-4952

Phone

(909) 949-2242

NPI assigned

May 26, 2020

Last updated

Aug 5, 2026By the provider in NPPES

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Electronic endpoints 1

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

Colorectal Surgery (Proctology)

Education

Other, 2020

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Master of Science

State licenses

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.

• City of Hope Medical Foundation

  dba City of Hope Duarte

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

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

{
    "created_epoch": "1590451200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785888000000",
    "number": "1861015729",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 512185",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900510185",
            "telephone_number": "626-397-5187"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1100 SAN BERNARDINO RD STE 1100",
            "city": "UPLAND",
            "state": "CA",
            "postal_code": "917864952",
            "telephone_number": "909-949-2242"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "320 W 6th St",
            "address_purpose": "LOCATION",
            "city": "Corona",
            "state": "CA",
            "postal_code": "928823349",
            "country_code": "US",
            "telephone_number": "951-898-2828",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MANISKAS",
        "first_name": "SEIJA",
        "credential": "MD, MS",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-05-26",
        "last_updated": "2026-08-05",
        "certification_date": "2026-08-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208C00000X",
            "taxonomy_group": "",
            "desc": "Colon & Rectal Surgery",
            "state": "CA",
            "license": "A187429",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "direct@cityofhope.direct-ci.com",
            "affiliation": "Y",
            "affiliationName": "CITY OF HOPE MEDICAL FOUNDATION",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "1500 Duarte Rd",
            "city": "Duarte",
            "state": "CA",
            "country_code": "US",
            "postal_code": "910103012",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Rishi Majithia
• Kristle Manaoat
• Mary Jane Relampagos Mancuso, FNP
• Mand Dental Corporation (Upland Laser Dental Center)
• Birinderjit Singh Mand, D.M.D.
• Caitlin Carolina Manlongat
• Mansour, Hatae, Habir, Ghorbanian Dental Corporation (Aava Dental of Upland)
• Marc H. Shomer, MD, PHD, Inc
• Marena Michael, DDS, Inc (Paula Van Horn DMD)
• Marie Stoddard Lyndsey MD PC

• Colon & Rectal Surgery Physician in Upland, CA
• Providers in Upland, CA by specialty
• Colon & Rectal Surgery Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 5, 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.