NPIMap

Individual provider Active NPI

Mark Stephan Ostrem, MD

  • Geriatric Medicine (Internal Medicine) Physician
  • Quincy, MA
National Provider Identifier
1811985633
Registry record updated Jan 15, 2018
On this page

Key facts

NPPES NPI Registry
Primary specialty
Geriatric Medicine (Internal Medicine) PhysicianTaxonomy code 207RG0300X
License
44501 Issued in MA
Practice address
54 Miller St
Suite 300
Quincy, MA 02169-4725
Phone
(617) 481-3300
Fax
(617) 481-3305
NPI assigned
Oct 6, 2005
Last updated
Jan 15, 2018By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jan 15, 2018

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Geriatric Medicine (Internal Medicine) Physician 207RG0300X 44501 MA Primary

Addresses

Primary practice location

54 Miller St
Suite 300
Quincy, MA 02169-4725

Mailing address

362 N Bedford St
East Bridgewater, MA 02333-1148
Phone (617) 481-3300

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20041215000212 MA Practitioner - Internal MedicinePractitioner - Geriatric Medicine 6305803958 Reassigns benefits to 4 organizations
Practice locations: Quincy, MA

Care Compare profile

Medicare Care Compare
Specialty
Internal MedicineAlso: Geriatric Medicine
Education
University of Minnesota Medical School, 1976
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Pembroke Medical Associates IncGroup PAC ID 3678992955, 26 clinicians

Practice addresses (Care Compare)

15 Old W Elm St
Pembroke, MA 02359-1731
Phone (781) 202-9292

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Steward Medical Group, Inc CurrentSince Jan 1, 2013 Accepting new patients
Compass Medical PC CurrentSince Apr 4, 2022 Accepting new patients
Steward Medical Group, Inc CurrentSince Jan 1, 2013 Accepting new patients
Pai Participant Ma PC Geriatric Medicine CurrentSince Nov 27, 2023 Accepting new patients
Compass Medical PC CurrentSince Apr 4, 2022 Accepting new patients
Alliance Health of Quincy, Inc. Past Accepting new patients
Alliance Health of Quincy, Inc. Past Accepting new patients
Affinity Healthcare LLC Past Accepting new patients
Boston Home Inc Past Accepting new patients

Locations

1102 Washington St
Braintree, MA 02184
Phone 7818483100 ext. 5405

11 Nevins St
Ste 201
Brighton, MA 02135
Phone (617) 789-2442

2100 Dorchester Ave
Dorchestr Ctr, MA 02124
Phone (617) 506-2222

111 Orient Ave
East Boston, MA 02128
Phone (617) 569-1200

362 N Bedford St
East Bridgewtr, MA 02333
Phone (508) 350-2350

8 Commerce Blvd
Middleboro, MA 02346
Phone (774) 260-9300

54 Miller St
#200
Quincy, MA 02169
Phone (617) 481-3200

54 Miller St
Ste 200
Quincy, MA 02169
Phone (617) 481-3200

54 Miller St
Ste 300
Quincy, MA 02169
Phone (617) 481-3300

700 Congress St
Ste 301
Quincy, MA 02169
Phone (617) 472-7111

40 Spring St
Watertown, MA 02472
Phone (617) 923-8433

Ownership & related parties

All facility ownership & control disclosures 3

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

FacilityTypeRoleSince
Alliance Health at Marina BayQuincy, MA, CCN 225680 Skilled nursing facility Operational/Managerial Control
Adp of the SNF		 Jan 1, 2016
May 19, 2025
The Boston Home IncBoston, MA, CCN 225434 Skilled nursing facility Contracted Managing Employee
Adp of the SNF		 Jan 1, 2010
Jan 23, 2025
Affinity HealthcareBraintree, MA, CCN 225445 Skilled nursing facility Operational/Managerial Control
Adp of the SNF		 Apr 1, 2024
Mar 23, 2025

Owned or controlled facilities with NPI records 3

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

Organizations & group practices 10

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.

Hospital & facility affiliations 8

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

NPI Registry JSON

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

{
    "created_epoch": "1128556800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1515974400000",
    "number": "1811985633",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "362 N BEDFORD ST",
            "city": "EAST BRIDGEWATER",
            "state": "MA",
            "postal_code": "023331148",
            "telephone_number": "617-481-3300",
            "fax_number": "617-481-3305"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "54 MILLER ST",
            "address_2": "SUITE 300",
            "city": "QUINCY",
            "state": "MA",
            "postal_code": "021694725",
            "telephone_number": "617-481-3300",
            "fax_number": "617-481-3305"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OSTREM",
        "first_name": "MARK",
        "middle_name": "STEPHAN",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-10-06",
        "last_updated": "2018-01-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Geriatric Medicine",
            "state": "MA",
            "license": "44501",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Quincy, MA

Sources for this page

Verify at the official NPI Registry.