NPIMap

Individual provider Active NPI

Sidney Olefson

  • Gastroenterology Physician
  • Burnt Hills, NY
National Provider Identifier
1457798506
Registry record updated Feb 3, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
278384 Issued in MA
Practice address
848 State Route 50
Burnt Hills, NY 12027-9511
Phone
(518) 831-1500
Fax
(518) 377-1677
NPI assigned
May 30, 2013
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 3, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 56817 CT
Student in an Organized Health Care Education/Training Program 390200000X 56817 CT
Gastroenterology Physician 207RG0100X 278384 MA Primary

Addresses

Primary practice location

848 State Route 50
Burnt Hills, NY 12027-9511

Mailing address

848 State Route 50
Burnt Hills, NY 12027-9511
Phone (518) 831-1500

Other practice location 1

1 West Ave Ste 130
Saratoga Springs, NY 12866-6050
Phone (518) 831-1500

Other practice location 2

1770 Route 9
Halfmoon, NY 12065-2495
Phone (518) 831-1500

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA, NY2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20190715002641 MA Practitioner - GastroenterologyPractitioner - Internal Medicine 5597982330 Reassigns benefits to 4 organizations
I20241212001930 NY Practitioner - Gastroenterology 5597982330 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
GastroenterologyAlso: Internal Medicine
Education
Albany Medical College of Union University, 2013
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Prima Care, PCGroup PAC ID 2567356017, 222 clinicians
Saratoga Schenectady Gastroenterology Associates, PCGroup PAC ID 6608855168, 31 clinicians

Practice addresses (Care Compare)

277 Pleasant St
Suite 240
Fall River, MA 02721-3005
Phone (508) 676-3292

848 State Route 50
Burnt Hills, NY 12027-9511
Phone 51883115001100

Hospital & facility affiliations

  • Saratoga Hospital Hospital, Saratoga Springs, NY, CCN 330222
  • Saint Anne'S Hospital Hospital, Fall River, MA, CCN 220020
  • Glens Falls Hospital Hospital, Glens Falls, NY, CCN 330191
  • Albany Medical Center Hospital Hospital, Albany, NY, CCN 330013
  • Ellis Hospital Hospital, Schenectady, NY, CCN 330153

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy83
Upper gastrointestinal (GI) endoscopy for acid reflux77

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
333290NYMDLicensed Practical Nurse
278384MAMDGastroenterology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Prima Care, PC CurrentSince Sep 1, 2020 Accepting new patients
Greater Boston Gastroenterology Gastroenterology CurrentSince Aug 19, 2019 Accepting new patients
Saratoga Schenectady Gastroenterology Associates, PC Internal Medicine CurrentSince Feb 1, 2025 Accepting new patients
Gbgastro LLC Gastroenterology CurrentSince Aug 19, 2019 Accepting new patients
Prima Care, PC CurrentSince Sep 1, 2020 Accepting new patients
Physicians of Cape Cod Hospital Internal Medicine CurrentSince Aug 1, 2025 Accepting new patients

Locations

277 Pleasant St
Ste 240
Fall River, MA 02721
Phone (500) 300-3271

277 Pleasant St
Fall River, MA 02721
Phone (508) 617-9740

277 Pleasant St
Fl 4
Fall River, MA 02721
Phone 50867632921244

289 Pleasant St
Ste 501
Fall River, MA 02721
Phone (508) 679-6611

475 Franklin St
Ste 110
Framingham, MA 01702
Phone (508) 620-9200

27 Park St
Hyannis, MA 02601
Phone (508) 775-5011

67 Slades Ferry Ave
Somerset, MA 02726
Phone (508) 673-9400

848 State Route 50
Burnt Hills, NY 12027
Phone (518) 831-1500

846 State Route 50
Burnt Hills, NY 12027

1770 Route 9
Halfmoon, NY 12065
Phone (518) 688-1380

1 West Ave
Ste 130
Saratoga Springs, NY 12866
Phone (518) 831-1500

Interoperability endpoints

  • FHIR API: https://fhir4.healow.com/fhir/r4/FECGDD
  • Direct secure messaging: sidney.olefson@prima.eclinicaldirectplus.com

Organizations & group practices 6

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.

Hospital & facility affiliations 26

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

View all 26

NPI Registry JSON

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

{
    "created_epoch": "1369872000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1738540800000",
    "number": "1457798506",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "848 STATE ROUTE 50",
            "city": "BURNT HILLS",
            "state": "NY",
            "postal_code": "120279511",
            "telephone_number": "518-831-1500",
            "fax_number": "518-377-1677"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "848 STATE ROUTE 50",
            "city": "BURNT HILLS",
            "state": "NY",
            "postal_code": "120279511",
            "telephone_number": "518-831-1500",
            "fax_number": "518-377-1677"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1 West Ave Ste 130",
            "address_purpose": "LOCATION",
            "city": "Saratoga Springs",
            "state": "NY",
            "postal_code": "128666050",
            "country_code": "US",
            "telephone_number": "518-831-1500",
            "fax_number": "518-377-1677",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1770 Route 9",
            "address_purpose": "LOCATION",
            "city": "Halfmoon",
            "state": "NY",
            "postal_code": "120652495",
            "country_code": "US",
            "telephone_number": "518-831-1500",
            "fax_number": "518-377-1677",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "OLEFSON",
        "first_name": "SIDNEY",
        "name_prefix": "Dr.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-05-30",
        "last_updated": "2025-02-03",
        "certification_date": "2025-02-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CT",
            "license": "56817",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "CT",
            "license": "56817",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "MA",
            "license": "278384",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Burnt Hills, NY

Sources for this page

Verify at the official NPI Registry.