Individual provider Active NPI

Peter J Siefken, PA

  • Medical Physician Assistant
  • Amagansett, NY
National Provider Identifier
1144347261
Registry record updated Dec 5, 2016
On this page

Key facts

NPPES NPI Registry
Primary specialty
Medical Physician AssistantTaxonomy code 363AM0700X
License
005732 Issued in NY
Practice address
518 Montauk Hwy
Ste 102
Amagansett, NY 11930
Phone
(631) 267-5373
Fax
(631) 267-5376
NPI assigned
Mar 23, 2007
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 5, 2016

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Medical Physician Assistant 363AM0700X 005732 NY Primary

Addresses

Primary practice location

518 Montauk Hwy
Ste 102
Amagansett, NY 11930

Mailing address

57 Hampton Road
Ste 201
Southampton, NY 11968
Phone (631) 283-1126

Other identifiers 1

IdentifierTypeStateIssuer
02175175MedicaidNY

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: No
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20160613000885 NY Practitioner - Physician Assistant 1557651015 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
State University of New York at Stony Brook, School of Medicine, 1996
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

999 Old Country Rd
Riverhead, NY 11901-2113
Phone (631) 284-5900

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Physician Assistant

State licenses

LicenseStateTypeSpecialty
005732NYMDClinical Psychologist

Practice roles

OrganizationSpecialtyStatusNew patients
City Medical of Upper East Side, PLLC CurrentSince Sep 22, 2025 Accepting new patients
City Medical of Upper East Side, PLLC CurrentSince Sep 22, 2025 Accepting new patients
City Medical of Upper East Side, PLLC Current Accepting new patients

Locations

2248 31st St
Astoria, NY 11105
Phone (718) 267-1333

3111 Steinway St
Astoria, NY 11103
Phone (718) 475-2345

336 E 86th St
New York, NY 10028
Phone (212) 772-3627

999 Old Country Rd
Riverhead, NY 11901
Phone (631) 284-5900

Interoperability endpoints

  • Direct secure messaging: peter.siefken.1@2983.direct.athenahealth.com

Organizations & group practices 4

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.

NPI Registry JSON

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

{
    "created_epoch": "1174608000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1480896000000",
    "number": "1144347261",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "57 HAMPTON ROAD",
            "address_2": "STE 201",
            "city": "SOUTHAMPTON",
            "state": "NY",
            "postal_code": "11968",
            "telephone_number": "631-283-1126",
            "fax_number": "631-283-7496"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "518 MONTAUK HWY",
            "address_2": "STE 102",
            "city": "AMAGANSETT",
            "state": "NY",
            "postal_code": "11930",
            "telephone_number": "631-267-5373",
            "fax_number": "631-267-5376"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIEFKEN",
        "first_name": "PETER",
        "middle_name": "J",
        "credential": "PA",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-03-23",
        "last_updated": "2016-12-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363AM0700X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Medical",
            "state": "NY",
            "license": "005732",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "02175175",
            "state": "NY"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Amagansett, NY

Sources for this page

Verify at the official NPI Registry.