NPIMap

Individual provider Active NPI

Jonathan Proulx, MD

  • Hematology (Internal Medicine) Physician
  • Dover, NH
National Provider Identifier
1518320837
Registry record updated Jan 9, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hematology (Internal Medicine) PhysicianTaxonomy code 207RH0000X
License
22815 Issued in NH
Practice address
789 Central Ave
Dover, NH 03820-2526
Phone
(603) 742-8787
NPI assigned
Apr 4, 2016
Last updated
Jan 9, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jan 9, 2026

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

Specialties & licenses 4

Specialty (taxonomy)CodeLicenseStatePrimary
Hematology (Internal Medicine) Physician 207RH0000X 22815 NH Primary
Hematology & Oncology Physician 207RH0003X MD26071 ME
Hematology & Oncology Physician 207RH0003X MD61686505 WA
Medical Oncology Physician 207RX0202X 22815 NH

Addresses

Primary practice location

789 Central Ave
Dover, NH 03820-2526

Mailing address

55 Fruit St
Boston, MA 02114-2621

Other practice location 1

1117 Spring St
Friday Harbor, WA 98250-9782
Phone (360) 378-1738

Other practice location 2

3301 Squalicum Pkwy
Bellingham, WA 98225-1919
Phone (360) 788-8222

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in ME, NH2 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
I20220802002745 ME Practitioner - Hematology/OncologyPractitioner - Internal Medicine 3870829237
I20220802002885 NH Practitioner - Hematology/OncologyPractitioner - Internal Medicine 3870829237 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Hematology/OncologyAlso: Internal Medicine
Education
Other, 2016
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices

Practice addresses (Care Compare)

789 Central Ave
Dover, NH 03820-2526
Phone (603) 742-8787

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
97.93 of 100Reported as apm
Quality
83.31
Promoting interoperability
100
Improvement activities
40

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
MD26071MEMDHematology & Oncology Physician
22815NHMDMedical Oncology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Maine Center for Cancer Medicine & Blood Disorders, P.a. CurrentSince Jul 17, 2022 Accepting new patients
Peacehealth CurrentSince Jun 8, 2025 Accepting new patients
Wentworth Douglass Physician Corporation CurrentSince Feb 9, 2026 Accepting new patients
Wentworth Douglass Physician Corporation CurrentSince Feb 9, 2026 Accepting new patients
Peacehealth CurrentSince Jun 8, 2025 Accepting new patients
Peacehealth Current Accepting new patients
Peacehealth CurrentSince Jun 8, 2025 Accepting new patients
Peacehealth Medical Oncology CurrentSince Jun 8, 2025 Accepting new patients
Westchester Neurological Consultant PC Past Accepting new patients
Maine Center for Cancer Medicine & Blood Disorders, P.a. Hematology & Oncology PastSince Aug 1, 2022 Accepting new patients

Locations

789 Central Ave
Dover, NH 03820
Phone (603) 740-2832

121 Corporate Dr
Ste 200
Portsmouth, NH 03801
Phone (603) 610-8075

155 Borthwick Ave
Ste C
Portsmouth, NH 03801
Phone (603) 433-4961

3015 Squalicum Pkwy
Ste 100
Bellingham, WA 98225
Phone (360) 715-4186

3301 Squalicum Pkwy
Bellingham, WA 98225
Phone (360) 788-8222

1117 Spring St
Friday Harbor, WA 98250
Phone (360) 378-1738

1115 SE 164th Ave
Dept 358
Vancouver, WA 98683
Phone (360) 729-1253

Interoperability endpoints

  • FHIR API: https://fhir.meditouchehr.com/api/fhir/r4/
  • Direct secure messaging: jproulx752896@direct.peacehealth.org

Organizations & group practices 11

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 43

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

View all 43

NPI Registry JSON

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

{
    "created_epoch": "1459728000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767916800000",
    "number": "1518320837",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "55 FRUIT ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142621"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "789 CENTRAL AVE",
            "city": "DOVER",
            "state": "NH",
            "postal_code": "038202526",
            "telephone_number": "603-742-8787"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1117 Spring St",
            "address_purpose": "LOCATION",
            "city": "Friday Harbor",
            "state": "WA",
            "postal_code": "982509782",
            "country_code": "US",
            "telephone_number": "360-378-1738",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3301 Squalicum Pkwy",
            "address_purpose": "LOCATION",
            "city": "Bellingham",
            "state": "WA",
            "postal_code": "982251919",
            "country_code": "US",
            "telephone_number": "360-788-8222",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "PROULX",
        "first_name": "JONATHAN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-04-04",
        "last_updated": "2026-01-09",
        "certification_date": "2026-01-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology",
            "state": "NH",
            "license": "22815",
            "primary": true
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "ME",
            "license": "MD26071",
            "primary": false
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "WA",
            "license": "MD61686505",
            "primary": false
        },
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "NH",
            "license": "22815",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Dover, NH

Sources for this page

Verify at the official NPI Registry.