Cynthia Llerena Sershen, F.N.P.

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

RN266574 Issued in MA

Practice address

41 Mall Rd
Burlington, MA 01805-5019

Phone

(781) 744-8000

NPI assigned

Mar 28, 2008

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

Other identifiers 1

Other names 1

• Cynthia Priscilla Llerena Former name

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, 2007

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Lahey Clinic IncGroup PAC ID 2264336528, 1,381 clinicians

Charles River Community Health, IncGroup PAC ID 5294709812, 33 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Lahey Hospital & Medical Center, Burlington Hospital, Burlington, MA, CCN 220171
• Northeast Hospital Corporation Hospital, Beverly, MA, CCN 220033

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: cynthia.sershen.p27@direct.medcor.nextgenshare.com
• FHIR API: https://api.platform.athenahealth.com/10729/brand/1/csg/1/fhir/r4

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.

• Charles River Community Health Inc

  • Federally Qualified Health Center (FQHC)
  • Brighton, MA
  • NPI 1487664884
  Medicare reassignment Care Compare group NPD
• Lahey Clinic, Inc

  • Internal Medicine Physician
  • Peabody, MA
  • NPI 1063447316
  Medicare reassignment Care Compare group NPD
• Beth Israel Lahey Health Primary Care Inc

  dba Lahey Health Urgent Care, Middleboro

  • Clinic/Center
  • Middleboro, MA
  • NPI 1568292423
  Medicare reassignment NPD
• Massachusetts Institute of Technology

  dba MIT Health

  • Multi-Specialty Clinic/Center
  • Cambridge, MA
  • NPI 1346308723
  Medicare reassignment NPD
• South Boston Community Health Center

  • Community Health Clinic/Center
  • South Boston, MA
  • NPI 1669447413
  Medicare reassignment NPD
• Lahey Clinic, Inc.

  dba Lahey Clinic

  • Internal Medicine Physician
  • Burlington, MA
  • NPI 1538194980
  Medicare reassignment
• Charles River Community Health, Inc

  • Federally Qualified Health Center (FQHC)
  • Allston, MA
  • NPI 1134306368
  NPD

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

• Lahey Clinic Hospital, Inc.

  • General Acute Care Hospital
  • Burlington, MA
  • NPI 1558392563
  Care Compare affiliation
• Northeast Hospital Corporation

  • General Acute Care Hospital
  • Beverly, MA
  • NPI 1316917941
  Care Compare affiliation
• Northeast Hospital Corporation

  • Psychiatric Hospital Unit
  • Beverly, MA
  • NPI 1407827710
  Care Compare affiliation

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

{
    "created_epoch": "1206662400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775779200000",
    "number": "1366614497",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PROVIDER ENROLLMENT 41 MALL ROAD",
            "city": "BURLINGTON",
            "state": "MA",
            "postal_code": "018050001"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "41 MALL RD",
            "city": "BURLINGTON",
            "state": "MA",
            "postal_code": "018055019",
            "telephone_number": "781-744-8000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "441 Stuart St Ste 404",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021165019",
            "country_code": "US",
            "telephone_number": "857-317-2057",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "495 Western Ave",
            "address_purpose": "LOCATION",
            "city": "Brighton",
            "state": "MA",
            "postal_code": "021351007",
            "country_code": "US",
            "telephone_number": "617-783-0500 x30500",
            "fax_number": "617-562-1398",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SERSHEN",
        "first_name": "CYNTHIA",
        "middle_name": "LLERENA",
        "credential": "F.N.P.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2008-03-28",
        "last_updated": "2026-04-10",
        "certification_date": "2026-04-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "MA",
            "license": "RN266574",
            "primary": true
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "MA",
            "license": "266574",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "110086807A",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "CYNTHIA",
            "last_name": "LLERENA",
            "middle_name": "PRISCILLA",
            "credential": "F.N.P.",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Siddharth Sehgal, M.D.
• Ryan G Seibert, M.D.
• Zakariah I Sekkal, DO
• Jennifer Sekurski, MS, RD, LDN
• Lisa G Serra, MD
• Elliot Louis Servais, M.D.
• Arevig Myrenie Setian, RN
• Seunghan Derek Song, DMD, PC (Derek Song, DMD)
• Victoria Jane Seward, M.D.
• Akram Shaar, M.D.

• Nurse Practitioner in Burlington, MA
• Providers in Burlington, MA by specialty
• Nurse Practitioner in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 10, 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.