JONATHAN PROULX (MD) – Hematology (Internal Medicine) Physician, NPI 1518320837
Hematology (Internal Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
965 INTERNAL MEDICINE in NH
Provider Addresses for JONATHAN PROULX (MD)
55 FRUIT ST
BOSTON, MA 021142621
Phone:
Type: Mailing
789 CENTRAL AVE
DOVER, NH 038202526
Phone: (603) 742-8787
Type: Location
3301 Squalicum Pkwy
Bellingham, WA 982251919
Phone: (360) 788-8222
Type: Location
1117 Spring St
Friday Harbor, WA 982509782
Phone: (360) 378-1738
Type: Location
Baystate Medical Center, 759, Chestnut Street, North End, Springfield, Hampden County, Massachusetts, 01199, United States
SPRINGFIELD, MA 011991001
Phone: (413) 794-0000
Type: Mailing
PO BOX 911
BRATTLEBORO, VT 053020911
Phone: (207) 303-3200
Fax: (207) 250-2140
Type: Mailing
155 BORTHWICK AVE STE C
PORTSMOUTH, NH 038017156
Phone: (603) 828-0100
Fax: (603) 828-0111
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 4 Open Payments records for all available years, with a total value of $86.
Total Amount is formed as General ($86) + Research ($0) + Ownership ($0) = $86.
Last reported payment date: 2024-11-15 • Largest payer in this snapshot: PFIZER INC. ($23).
Total Amount
$86
General + Research + Ownership
Payments
4
Total payment records
General Amount
$86
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-15
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| PFIZER INC. | $23 |
| Janssen Pharmaceuticals, Inc | $22 |
| Daiichi Sankyo Inc. | $21 |
| Pharmacyclics LLC, an AbbVie Company | $20 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2025-07-16
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 3 Medicare enrollment records; no due dates published yet.
Enrollment records
3
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20220802002745 | I | Hematology/Oncology | ME | TBD |
| I20220802002885 | I | Hematology/Oncology | NH | TBD |
| I20250716002761 | I | Hematology/Oncology | WA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| J1439 | Injection, ferric carboxymaltose, 1 mg | 77,250 | 66 | $0 |
| J9271 | Injection, pembrolizumab, 1 mg | 8,800 | 18 | $0 |
| J0897 | Injection, denosumab, 1 mg | 6,420 | 81 | $0 |
| J1100 | Injection, dexamethasone sodium phosphate, 1 mg | 1,901 | 56 | $0 |
| J1626 | Injection, granisetron hydrochloride, 100 mcg | 370 | 19 | $0 |
Insurance plans in this area (ZIP 02114)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Family Practice | WA | |
| Internal Medicine | WA | |
| Family Practice | WA | |
| - | WA | |
| - | WA | |
| Orthopedic Surgery | WA | |
| - | WA | |
| - | WA | |
| - | WA | |
| Family Practice | OH |
Reviews
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