JONATHAN PROULX MD
NPI 1518320837
Internal Medicine - Hematology in Dover, NH

Active since April 04, 2016PECOS EnrolledAccepts Medicare Assignment
98.06/100
CMS Quality Rating
789 CENTRAL AVE, DOVER, NH 03820(603) 742-8787 Get Directions Write a Review

NPPES record last updated: January 9, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jan 9, 2026, Dec 16, 2025, Dec 10, 2025 and 6 more (9 updates tracked since 2019).

About Jonathan Proulx Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JONATHAN PROULX MD (NPI 1518320837) is an individual hematology provider in Dover, New Hampshire, licensed in New Hampshire (22815) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS, is affiliated with Maine Medical Center, and is a graduate of Other (2016).

NPPES Registry Identity

NPI1518320837
Entity TypeIndividualMale
Primary Taxonomy207RH0000X
Provider Legal NameJONATHAN PROULXCredential: MD
Location Address789 CENTRAL AVEDover, NH 03820-2526
Mailing Address55 Fruit StBoston, MA 02114-2621
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateApril 4, 2016
Last NPPES UpdateJanuary 9, 20269 updates tracked since enumeration
NPPES CertifiedJanuary 9, 2026
NPI 1518320837 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

Primary SpecialtyInternal Medicine · HematologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0000X
License Licensed in NH · 22815
Definition
An internist with additional training who specializes in diseases of the blood, spleen and lymph. This specialist treats conditions such as anemia, clotting disorders, sickle cell disease, hemophilia, leukemia and lymphoma.
Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X · License MD26071 (ME), MD61686505 (WA)
Also ListedInternal Medicine · Medical OncologyTaxonomy 207RX0202X · License 22815 (NH)
789 CENTRAL AVE, Dover, NH 03820

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Jonathan Proulx Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3870829237
PECOS Enrollment IDI20220802002885
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 53

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, ferric carboxymaltose, 1 mg J1439
Ferric carboxymaltose is an iron supplement injection. It's given when your body needs more iron than you can consume through diet, like in anemia. The injection is administered by a healthcare professional into a vein.
82,500 services75 patients
Injection, pembrolizumab, 1 mg J9271
Pembrolizumab is a medication given via injection to help your body's immune system fight certain types of cancer. It's typically administered in a hospital or clinic by a healthcare professional.
7,600 services17 patients
Injection, denosumab, 1 mg J0897
Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.
7,260 services89 patients
Injection, immune globulin, (gammagard liquid), non-lyophilized, (e.g., liquid), 500 mg J1569
The Gammagard Liquid injection is a type of immune globulin therapy. It's used to boost your body's immune system, helping it fight off infections. The therapy involves injecting a liquid form of proteins, collected from healthy donors, into your body. This is a 500mg dose.
2,000 services14 patients
Injection, dexamethasone sodium phosphate, 1 mg J1100
Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.
1,863 services63 patients
Injection, leucovorin calcium, per 50 mg J0640
Leucovorin calcium is an injection given to enhance the effectiveness of certain cancer treatments or to reduce the harmful effects of some medications. The dose is determined by your doctor and is typically administered in a healthcare setting.
895 services12 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Maine Medical Center

Acute Care Hospitals · Portland, ME
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number200009
Location22 Bramhall StPortland, ME 04102 · Cumberland County
Emergency services Birthing friendly

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220110
Location75 Francis StreetBoston, MA 02115 · Suffolk County
Emergency services Birthing friendly

Wentworth-Douglass Hospital

Acute Care Hospitals · Dover, NH
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number300018
Location789 Central AveDover, NH 03820 · Strafford County
Emergency services Birthing friendly

St Joseph Hospital

Acute Care Hospitals · Bellingham, WA
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number500030
Location2901 Squalicum ParkwayBellingham, WA 98225 · Whatcom County
Emergency services Birthing friendly

Peacehealth Peace Island Medical Center

Critical Access Hospitals · Friday Harbor, WA
OwnershipVoluntary non-profit - Private
CMS Certification Number501340
Location1117 Spring StreetFriday Harbor, WA 98250 · San Juan County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 03820 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$174.26 typical visit price
range $57.75 – $174.26
Typical copayment $43.56 (range $14.43 – $43.56)
Most-billed visit code 99205
Established Patient
$101.54 typical visit price
range $18.70 – $142.15
Typical copayment $25.38 (range $4.67 – $35.53)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

98.06/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality86.13
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Hospitalist
789 CENTRAL AVE
DOVER, NH 03820
Nurse Anesthetist, Certified Registered
789 CENTRAL AVE
DOVER, NH 03820
Anesthesiology (Pain Medicine)
789 CENTRAL AVE
DOVER, NH 03820
Specialist
789 CENTRAL AVE
DOVER, NH 03820
Nurse Practitioner (Neonatal)
789 CENTRAL AVE
DOVER, NH 03820
Nurse Practitioner
789 CENTRAL AVE
DOVER, NH 03820
Durable Medical Equipment & Medical Supplies
789 CENTRAL AVE
DOVER, NH 03820
Registered Nurse (Maternal Newborn)
789 CENTRAL AVE
DOVER, NH 03820

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jonathan Proulx's NPI number?

The NPI number for Jonathan Proulx is 1518320837. It was assigned to this individual provider in the NPPES registry on April 4, 2016.

Where is Jonathan Proulx located?

Jonathan Proulx practices at 789 Central Ave, Dover, NH 03820. The listed phone number is (603) 742-8787.

What is Jonathan Proulx's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology, with taxonomy code 207RH0000X.

Is Jonathan Proulx enrolled in Medicare?

Yes. Jonathan Proulx is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Jonathan Proulx accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Jonathan Proulx as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Jonathan Proulx affiliated with any hospitals?

According to CMS data, Jonathan Proulx is affiliated with Maine Medical Center, Brigham And Women's Hospital, Wentworth-Douglass Hospital, St Joseph Hospital and Peacehealth Peace Island Medical Center.

When was this NPI record last updated?

The NPPES record for Jonathan Proulx was last updated on January 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.