Jennifer Martell Collar, CNP

Primary specialty

Neonatal Nurse PractitionerTaxonomy code 363LN0000X

License

RN284243 Issued in MA

Practice address

585 Lebanon St
Melrose, MA 02176-3225

Phone

(781) 979-3000

NPI assigned

Jan 31, 2023

Last updated

Mar 11, 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 2

Addresses

Medicare fee-for-service enrollment

Enrolled in MA

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

Nurse Practitioner

Education

Other, 2022

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Hallmark Health Medical Associates IncGroup PAC ID 4385638782, 151 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Melrosewakefield Healthcare Hospital, Melrose, MA, CCN 220070

Medicare enrollment (NPD)

Enrolled

Credentials

Certified Nurse Practitioner, Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: collar.jennifer.mgh@direct.partners.masshiway.net

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.

• Hallmark Health Medical Associates Inc

  • Family Medicine Physician
  • Medford, MA
  • NPI 1770563900
  Medicare reassignment Care Compare group NPD
• Brigham & Womens Physicians Organization Inc

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1033535497
  Medicare reassignment NPD
• Child Health Foundation of Boston, Inc.

  • Pediatrics Physician
  • Boston, MA
  • NPI 1619969920
  Medicare reassignment
• General Hospital Corp

  dba Massachusetts General Hospital Outpatient Pharmacy

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1508390014
  NPD
• Hallmark Health System Inc

  • Internal Medicine Physician
  • Medford, MA
  • NPI 1275673667
  NPD (past)

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

• Melrosewakefield Healthcare, Inc.

  • General Acute Care Hospital
  • Medford, MA
  • NPI 1841290467
  Care Compare affiliation

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

{
    "created_epoch": "1675123200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773187200000",
    "number": "1881390029",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "960 MASSACHUSETTS AVE STE 2",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021182690",
            "telephone_number": "617-414-5405"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "585 LEBANON ST",
            "city": "MELROSE",
            "state": "MA",
            "postal_code": "021763225",
            "telephone_number": "781-979-3000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "850 Harrison Ave",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021184001",
            "country_code": "US",
            "telephone_number": "617-414-4359",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "15 Francis St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021156105",
            "country_code": "US",
            "telephone_number": "617-732-8881",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "75 Francis St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021156110",
            "country_code": "US",
            "telephone_number": "617-732-5500",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1153 Centre St",
            "address_purpose": "LOCATION",
            "city": "Jamaica Plain",
            "state": "MA",
            "postal_code": "021303446",
            "country_code": "US",
            "telephone_number": "617-983-7000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "COLLAR",
        "first_name": "JENNIFER",
        "middle_name": "MARTELL",
        "credential": "CNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2023-01-31",
        "last_updated": "2026-03-11",
        "certification_date": "2026-03-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LA2100X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Acute Care",
            "state": "MA",
            "license": "RN284243",
            "primary": false
        },
        {
            "code": "363LN0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Neonatal",
            "state": "MA",
            "license": "RN284243",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• City of Melrose
• City of Melrose
• Christine McCarthy Clark, MS, RD, LDN, CSSD
• Kristina Ann Codilla, PT
• Patrick Joseph Colbert, APRN, CS
• Michelle Lynne Butman Collins, LICSW
• Complex Trauma Institute LLC (Complex Trauma Treatment Center Boston)
• Connected Pelvic Floor Physical Therapy LLC
• Margaret Connolly, ANP-BC
• Nixon Cornay

• Neonatal Nurse Practitioner in Melrose, MA
• Providers in Melrose, MA by specialty
• Neonatal Nurse Practitioner in Massachusetts

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