Olga Marsillio, DNP

Primary specialty

Certified Registered Nurse AnesthetistTaxonomy code 367500000X

License

90139 Issued in CT

Practice address

365 Montauk Ave
New London, CT 06320-4700

Phone

(860) 442-0711

NPI assigned

Apr 27, 2012

Sex

Female

Sole proprietor

Yes

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 CT, NH2 enrollments

Enrollment records 2

Specialty

Certified Registered Nurse Anesthetist (Crna)

Education

Other, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Dartmouth-Hitchcock ClinicGroup PAC ID 4183537509, 1,445 clinicians

Yale UniversityGroup PAC ID 9436061736, 2,632 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Bridgeport Hospital Hospital, Bridgeport, CT, CCN 070010
• Mary Hitchcock Memorial Hospital Hospital, Lebanon, NH, CCN 300003

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as apm

Quality

86.54

Promoting interoperability

99.98

Improvement activities

40

Merit-based Incentive Payment System (MIPS)

Final score

87.36 of 100Reported as group

Quality

77.36

Promoting interoperability

100

Improvement activities

40

Cost

74.27

Medicare enrollment (NPD)

Enrolled

Credentials

Certified Registered Nurse

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.

• Yale University

  • Anesthesiology Physician
  • New Haven, CT
  • NPI 1205822236
  Medicare reassignment Care Compare group NPD
• Dartmouth-Hitchcock Clinic

  • Internal Medicine Physician
  • Lebanon, NH
  • NPI 1548210198
  Medicare reassignment Care Compare group
• Bridgeport Anesthesia Associates, P.C.

  • Anesthesiology Physician
  • Bridgeport, CT
  • NPI 1174549257

  Nurse Anesthetist, Certified Registered

  Medicare reassignment NPD
• Connecticut Gi PLLC

  • Gastroenterology Physician
  • Hartford, CT
  • NPI 1023124625
  Medicare reassignment NPD
• Endoscopy Center of Connecticut, LLC

  • Endoscopy Clinic/Center
  • Hamden, CT
  • NPI 1386757854
  Medicare reassignment NPD
• Integrated Anesthesia Associates LLC

  • Anesthesiology Physician
  • Shelton, CT
  • NPI 1881636397

  Nurse Anesthetist, Certified Registered

  Medicare reassignment NPD
• North American Partners in Anesthesia Connecticut PC

  • Anesthesiology Physician
  • New Britain, CT
  • NPI 1316994775
  Medicare reassignment NPD
• Northeast Medical Group, Inc.

  • Internal Medicine Physician
  • Bridgeport, CT
  • NPI 1043278351

  Nurse Anesthetist, Certified Registered

  Medicare reassignment NPD
• Mary Hitchcock Memorial Hospital

  • General Acute Care Hospital
  • Lebanon, NH
  • NPI 1023092053
  Medicare reassignment
• Endoscopy Center of Connecticut, LLC

  • Endoscopy Clinic/Center
  • Guilford, CT
  • NPI 1326131418
  NPD
• Yale University

  • Durable Medical Equipment & Medical Supplies
  • Fairfield, CT
  • NPI 1548066962
  NPD

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

• Bridgeport Hospital

  • General Acute Care Hospital
  • Bridgeport, CT
  • NPI 1649260845
  Care Compare affiliation
• Bridgeport Hospital

  • General Acute Care Hospital
  • Bridgeport, CT
  • NPI 1992910152
  Care Compare affiliation
• Mary Hitchcock Memorial Hospital

  • General Acute Care Hospital
  • Lebanon, NH
  • NPI 1023092053
  Care Compare affiliation
• Mary Hitchcock Memorial Hospital

  • General Acute Care Hospital
  • Lebanon, NH
  • NPI 1629788237
  Care Compare affiliation

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

{
    "created_epoch": "1335484800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773187200000",
    "number": "1841558897",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "450 CENTER ST",
            "address_2": "UNIT 16",
            "city": "SOUTHPORT",
            "state": "CT",
            "postal_code": "068901447"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "365 MONTAUK AVE",
            "city": "NEW LONDON",
            "state": "CT",
            "postal_code": "063204700",
            "telephone_number": "860-442-0711"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1 Medical Center Dr",
            "address_purpose": "LOCATION",
            "city": "Lebanon",
            "state": "NH",
            "postal_code": "037561000",
            "country_code": "US",
            "telephone_number": "603-650-5000",
            "fax_number": "603-640-1228",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MARSILLIO",
        "first_name": "OLGA",
        "credential": "DNP",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2012-04-27",
        "last_updated": "2026-03-11",
        "certification_date": "2026-03-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "CT",
            "license": "90139",
            "primary": true
        },
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "NH",
            "license": "116941-23",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Latanya Manu, MS, MFT
• Matthew C Marcenelle
• Thomas Marcille, OTR/L
• Cheryl Marsh, APRN
• Heather Anne Marshall, MA
• Paula Marte, MSW, LMSW
• Amy G Martin, APRN
• Rolando Thomas Martinez, MSW, LCSW, LADC
• Patricia P Martini, APRN
• Samuel Maryles, MD

• Certified Registered Nurse Anesthetist in New London, CT
• Providers in New London, CT by specialty
• Certified Registered Nurse Anesthetist in Connecticut

• 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.
• 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.