Sina Nikayin, MD

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

66272 Issued in CT

Practice address

129 Kings Hwy N
Westport, CT 06880-2438

Phone

(203) 707-2000

Fax

(203) 707-1999

NPI assigned

May 11, 2017

Sex

Male

Sole proprietor

Yes

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 CT

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

Psychiatry

Education

Other, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Yale UniversityGroup PAC ID 9436061736, 2,632 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Yale-New Haven Hospital Hospital, New Haven, CT, CCN 070022

Merit-based Incentive Payment System (MIPS)

Final score

92.66 of 100Reported as group

Quality

98.16

Promoting interoperability

100

Improvement activities

40

Cost

44.02

Merit-based Incentive Payment System (MIPS)

Final score

87.36 of 100Reported as group

Quality

77.36

Promoting interoperability

100

Improvement activities

40

Cost

74.27

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: snikayin465096@direct.ynhh.org
• FHIR API: https://fhir-myrecord.cerner.com/r4/757da7e0-03b8-44ae-ae29-c8503bbfb4b0/

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.

• Rumi Mind Health Providers of CT

  • Psychiatry Physician
  • Westport, CT
  • NPI 1245043173
  Medicare reassignment NPD Authorized official
• Yale University

  dba Yale Medicine

  • Anesthesiology Physician
  • New Haven, CT
  • NPI 1205822236

  Psychiatry

  Medicare reassignment Care Compare group NPD
• Yale New Haven Hospital

  • General Acute Care Hospital
  • New Haven, CT
  • NPI 1336139500
  Medicare reassignment NPD
• Yale University

  • Durable Medical Equipment & Medical Supplies
  • Fairfield, CT
  • NPI 1548066962
  NPD

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

• Yale New Haven Hospital

  • General Acute Care Hospital
  • New Haven, CT
  • NPI 1336139500
  Care Compare affiliation
• Yale New Haven Hospital

  • General Acute Care Hospital
  • New Haven, CT
  • NPI 1578778726
  Care Compare affiliation

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

{
    "created_epoch": "1494460800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756944000000",
    "number": "1740717560",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "129 KINGS HWY N",
            "city": "WESTPORT",
            "state": "CT",
            "postal_code": "068802438",
            "telephone_number": "203-707-2000",
            "fax_number": "203-707-1907"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "129 KINGS HWY N",
            "city": "WESTPORT",
            "state": "CT",
            "postal_code": "068802438",
            "telephone_number": "203-707-2000",
            "fax_number": "203-707-1999"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "300 George St Ste 901",
            "address_purpose": "LOCATION",
            "city": "New Haven",
            "state": "CT",
            "postal_code": "065116662",
            "country_code": "US",
            "telephone_number": "203-785-2095",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NIKAYIN",
        "first_name": "SINA",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2017-05-11",
        "last_updated": "2025-09-04",
        "certification_date": "2025-09-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "CT",
            "license": "66272",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Elizabeth O Nguyen
• Mutahir Niaz
• Laurabeth Nickerson, BCBA
• Nicole Barrato Dba Nutrigreene (NutriGreene)
• Ivette Nieves, LMT
• Megan Nisenson
• Dorian Rose Nissenson, M.S.P.T.
• Noa Health and Acupuncture LLC
• Nadia Noori, N.D
• Seth Michael Nordgren, LBA, BCBA

• Psychiatry Physician in Westport, CT
• Providers in Westport, CT by specialty
• Psychiatry Physician in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 4, 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.