Eryn T Johnstone, PNP

Primary specialty

Pediatric Nurse PractitionerTaxonomy code 363LP0200X

License

RN2340875 Issued in MA

Practice address

300 Longwood Ave
Boston, MA 02115-5724

Phone

(617) 355-6000

NPI assigned

Apr 8, 2021

Sex

Female

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 PA

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

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

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.

• Childrens Health Care Associates, Inc

  • Pediatrics Physician
  • Philadelphia, PA
  • NPI 1598869059
  Medicare reassignment NPD
• Childen'S Health Care Associates Inc.

  • Pediatric Registered Nurse
  • Philadelphia, PA
  • NPI 1699860643
  NPD
• Childrens Health Care Associates, Inc

  • Pediatric Cardiology Physician
  • Philadelphia, PA
  • NPI 1639264682
  NPD

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

{
    "created_epoch": "1617840000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786406400000",
    "number": "1356921027",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 LONGWOOD AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021155724",
            "telephone_number": "617-355-6000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 LONGWOOD AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021155724",
            "telephone_number": "617-355-6000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3401 Civic Center Blvd",
            "address_purpose": "LOCATION",
            "city": "Philadelphia",
            "state": "PA",
            "postal_code": "191044319",
            "country_code": "US",
            "telephone_number": "215-590-4040",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "JOHNSTONE",
        "first_name": "ERYN",
        "middle_name": "T",
        "credential": "PNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2021-04-08",
        "last_updated": "2026-08-11",
        "certification_date": "2026-08-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP0200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Pediatrics",
            "state": "MA",
            "license": "RN2340875",
            "primary": true
        },
        {
            "code": "363LP0200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Pediatrics",
            "state": "PA",
            "license": "SP023361",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Emily Johnston
• Katherine T Johnston, M.D., M.A., M.SC.
• Mark C Johnston, PH.D.
• Molly Johnston, RECOVERY COACH
• Natalie T Johnston, MSN, CPNP-PC
• Sarah Elizabeth Johnstone, M.D., PH.D.
• Amer Johri, MD
• Benjamin Joiner
• Malachi Joiner
• Joint Ventures Physical Therapy, Inc.

• Pediatric Nurse Practitioner in Boston, MA
• Providers in Boston, MA by specialty
• Pediatric Nurse Practitioner in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 11, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.