Nathaniel Thomas Nieva, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

2000 Issued in NH

Practice address

264 Pleasant St
Concord, NH 03301-2551

Phone

(603) 224-3368

Fax

(603) 228-7268

NPI assigned

Jun 3, 2022

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in NH

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

Specialty

Physician Assistant

Education

Other, 2022

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Northeast Orthopaedic Alliance PLLCGroup PAC ID 5991149809, 288 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Concord Hospital Hospital, Concord, NH, CCN 300001
• New London Hospital Hospital, New London, NH, CCN 301304
• Elliot Hospital Hospital, Manchester, NH, CCN 300012

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: nathaniel.nieva.1@32845.direct.athenahealth.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.

• Northeast Orthopaedic Alliance PLLC

  • Orthopaedic Surgery Physician
  • Waltham, MA
  • NPI 1417724170

  NH

  Medicare reassignment Care Compare group NPD

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

• Concord Hospital, Inc.

  • General Acute Care Hospital
  • Concord, NH
  • NPI 1215988530
  Care Compare affiliation
• Elliot Hospital of the City of Manchester

  • General Acute Care Hospital
  • Manchester, NH
  • NPI 1902996028
  Care Compare affiliation
• The New London Hospital Association, Inc.

  • Ambulance
  • New London, NH
  • NPI 1639610611

  Hospital

  Care Compare affiliation
• The New London Hospital Association, Inc.

  • Critical Access Hospital
  • New London, NH
  • NPI 1831200583
  Care Compare affiliation

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

{
    "created_epoch": "1654214400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1752796800000",
    "number": "1619616901",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "264 PLEASANT ST",
            "city": "CONCORD",
            "state": "NH",
            "postal_code": "033012551",
            "telephone_number": "603-224-3368",
            "fax_number": "603-228-7268"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "264 PLEASANT ST",
            "city": "CONCORD",
            "state": "NH",
            "postal_code": "033012551",
            "telephone_number": "603-224-3368",
            "fax_number": "603-228-7268"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "185 Queen City Ave",
            "address_purpose": "LOCATION",
            "city": "Manchester",
            "state": "NH",
            "postal_code": "031017121",
            "country_code": "US",
            "telephone_number": "603-625-1655",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NIEVA",
        "first_name": "NATHANIEL",
        "middle_name": "THOMAS",
        "name_prefix": "Mr.",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-06-03",
        "last_updated": "2025-07-18",
        "certification_date": "2025-07-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "NH",
            "license": "2000",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Julie Nicknair-Keon, LCMHC NCC
• Richard Niederman, DMD
• Carol Niegisch, MD
• Katherine E Niegisch, M.D.
• Kathleen Anne Nielsen, APRN BC
• Stephanie Nigrelli, BA
• Giulia Nihan, MS
• Zoe Nikitas
• Nikki D. Hipps Counseling, LLC
• Justine Nims-Largy, APRN

• Physician Assistant in Concord, NH
• Providers in Concord, NH by specialty
• Physician Assistant in New Hampshire

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 18, 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.