NPIMap

Individual provider Active NPI

Sydney Egan Blanchard

  • Physician Assistant
  • Boulder, CO
National Provider Identifier
1760034656
Registry record updated Oct 10, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
PA.0009581 Issued in CO
Practice address
4743 Arapahoe Ave Ste 202
Boulder, CO 80303-1128
Phone
(303) 415-4599
NPI assigned
Jul 11, 2019
Last updated
Oct 10, 2026By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Oct 10, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Physician Assistant 363A00000X PA.0009581 CO Primary

Addresses

Primary practice location

4743 Arapahoe Ave Ste 202
Boulder, CO 80303-1128

Mailing address

PO Box 9049
Boulder, CO 80301-9049
Phone (303) 415-4101

Other practice location 1

4743 Arapahoe Ave Ste 100
Boulder, CO 80303-1123
Phone (303) 415-4599

Other practice location 2

44 L St
Hull, MA 02045-1706
Phone (617) 721-3151

Other practice location 3

75 Francis St
Boston, MA 02115-6110
Phone (617) 732-7678

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA, CO2 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
I20200302001230 MA Practitioner - Physician Assistant 4183051246 Reassigns benefits to 3 organizations
I20260422002496 CO Practitioner - Physician Assistant 4183051246 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 2019
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Lahey Clinic IncGroup PAC ID 2264336528, 1,381 clinicians
Boulder Community HealthGroup PAC ID 6800707233, 260 clinicians

Practice addresses (Care Compare)

29 Mall Rd
Burlington, MA 01805-0001

41 Mall Rd
Burlington, MA 01805-0001
Phone (781) 744-8771

4743 Arapahoe Ave
Suite 100
Boulder, CO 80303-1123
Phone (303) 443-2123

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Physician Assistant

State licenses

LicenseStateTypeSpecialty
PA.0009581COMDPhysician Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
Brigham & Womens Physicians Organization Inc CurrentSince Feb 4, 2020 Accepting new patients
Brigham and Women's Hospital Current Accepting new patients
Lahey Clinic, Inc. CurrentSince Dec 17, 2021 Accepting new patients
Brigham and Womens Physicians Organization Inc Past Accepting new patients

Locations

75 Francis St
Boston, MA 02115

375 Boylston St
Brookline, MA 02445
Phone (508) 718-4010

41 Mall Rd
Burlington, MA 01805
Phone (781) 744-8085

Interoperability endpoints

  • Direct secure messaging: blanchard.sydney.bwh@direct.partners.masshiway.net
  • Direct secure messaging: sblanchard175234@direct.bilh.masshiway.net

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 35

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

View all 35

NPI Registry JSON

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

{
    "created_epoch": "1562803200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1791590400000",
    "number": "1760034656",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 9049",
            "city": "BOULDER",
            "state": "CO",
            "postal_code": "803019049",
            "telephone_number": "303-415-4101",
            "fax_number": "303-415-4769"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4743 ARAPAHOE AVE STE 202",
            "city": "BOULDER",
            "state": "CO",
            "postal_code": "803031128",
            "telephone_number": "303-415-4599"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4743 Arapahoe Ave Ste 100",
            "address_purpose": "LOCATION",
            "city": "Boulder",
            "state": "CO",
            "postal_code": "803031123",
            "country_code": "US",
            "telephone_number": "303-415-4599",
            "fax_number": "303-443-9497",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "44 L St",
            "address_purpose": "LOCATION",
            "city": "Hull",
            "state": "MA",
            "postal_code": "020451706",
            "country_code": "US",
            "telephone_number": "617-721-3151",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "75 Francis St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021156110",
            "country_code": "US",
            "telephone_number": "617-732-7678",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BLANCHARD",
        "first_name": "SYDNEY",
        "middle_name": "EGAN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2019-07-11",
        "last_updated": "2026-10-10",
        "certification_date": "2026-10-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CO",
            "license": "PA.0009581",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boulder, CO

Sources for this page

Verify at the official NPI Registry.