Simon J Ostrowski, MD

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

1021958 Issued in MA

Practice address

55 Lake Ave N
Worcester, MA 01655-0002

Phone

(508) 421-1401

Fax

(508) 421-1490

NPI assigned

May 3, 2020

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in PA, MA2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Emergency MedicineAlso: Medical Toxicology

Education

University of Massachusetts Medical School, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Umass Memorial Medical Group IncGroup PAC ID 4284539891, 2,494 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Umass Memorial Medical Center/University Campus Hospital, Worcester, MA, CCN 220163

Merit-based Incentive Payment System (MIPS)

Final score

80.94 of 100Reported as group

Quality

61.89

Promoting interoperability

100

Improvement activities

40

Cost

74.58

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• Umass Memorial Medical Group Inc

  • Internal Medicine Physician
  • Worcester, MA
  • NPI 1760445373

  Emergency Medicine

  Medicare reassignment Care Compare group NPD
• University of Pittsburgh Physicians

  • Gastroenterology Physician
  • Pittsburgh, PA
  • NPI 1619935004
  Medicare reassignment NPD
• Umass Memorial Medical Group, Inc.

  • Urgent Care Clinic/Center
  • Oxford, MA
  • NPI 1982381018
  NPD
• University of Pittsburgh Physicians

  • Diagnostic Radiology Physician
  • Pittsburgh, PA
  • NPI 1285692699
  NPD
• University of Pittsburgh Physicians

  • Urgent Care Clinic/Center
  • Pittsburgh, PA
  • NPI 1942674569

  Emergency Medicine

  NPD

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

• Umass Memorial Medical Center, Inc.

  • General Acute Care Hospital
  • Worcester, MA
  • NPI 1831151455
  Care Compare affiliation

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

{
    "created_epoch": "1588464000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1742256000000",
    "number": "1184245979",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 415348",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022415348"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "55 LAKE AVE N",
            "city": "WORCESTER",
            "state": "MA",
            "postal_code": "016550002",
            "telephone_number": "508-421-1401",
            "fax_number": "508-421-1490"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "200 Lothrop St",
            "address_purpose": "LOCATION",
            "city": "Pittsburgh",
            "state": "PA",
            "postal_code": "152132536",
            "country_code": "US",
            "telephone_number": "412-647-8262",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "OSTROWSKI",
        "first_name": "SIMON",
        "middle_name": "J",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-05-03",
        "last_updated": "2025-03-18",
        "certification_date": "2025-03-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "MA",
            "license": "1021958",
            "primary": true
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "PA",
            "license": "MD481030",
            "primary": false
        },
        {
            "code": "207PT0002X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Medical Toxicology",
            "state": "MA",
            "license": "1021958",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kerri E Osterhaus-Houle, MD
• Jodi L Osterhout Vanasse, NP
• Ivelisse Ostolaza
• Katya Ostrovsky, CNP
• John Adam Ostrowski, MS, ATC
• Ankur Oswal, D.M.D
• Joselle Marie Otero Palacios, M.D.
• Naomi Oti, AGACNP-BC
• James A Otis, M.D.
• John Patrick Otoole, R.PH

• Emergency Medicine Physician in Worcester, MA
• Providers in Worcester, MA by specialty
• Emergency Medicine Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 18, 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.