Elena Eftimova Rittmeyer

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

RN265744 Issued in MA

Practice address

290 Littleton Rd Unit 3
Chelmsford, MA 01824-3429

Phone

(978) 685-2460

Fax

(978) 685-2572

NPI assigned

Mar 22, 2024

Sex

Female

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 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, 2023

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Lawrence General Community Medical Service PLLCGroup PAC ID 4486941473, 53 clinicians

New England Community Medical Services PLLCGroup PAC ID 8628102928, 53 clinicians

Practice addresses (Care Compare)

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.

• Lawrence General Community Medical Service PLLC

  • Internal Medicine Physician
  • Chelmsford, MA
  • NPI 1174076418
  Medicare reassignment Care Compare group NPD
• New England Community Medical Services PLLC

  • Internal Medicine Physician
  • Chelmsford, MA
  • NPI 1427376516
  Medicare reassignment Care Compare group NPD

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

{
    "created_epoch": "1711065600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1748390400000",
    "number": "1306606595",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "290 LITTLETON RD UNIT 3",
            "city": "CHELMSFORD",
            "state": "MA",
            "postal_code": "018243429",
            "telephone_number": "978-685-2460",
            "fax_number": "978-685-2572"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "290 LITTLETON RD UNIT 3",
            "city": "CHELMSFORD",
            "state": "MA",
            "postal_code": "018243429",
            "telephone_number": "978-685-2460",
            "fax_number": "978-685-2572"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "RITTMEYER",
        "first_name": "ELENA",
        "middle_name": "EFTIMOVA",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2024-03-22",
        "last_updated": "2025-05-28",
        "certification_date": "2025-05-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "MA",
            "license": "RN265744",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kayla Victoria Riendeau
• Nina Marie Riley
• Matthew H Riordan, DPM
• Dafnieselly Rios-Quiles
• Robin A Risso, LMFT
• Sophie Ritz
• Melissa Rivera
• Eshal Rizwan
• Clarissa Ann Roberts
• Grace Robinson

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 28, 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.