Rebecca Belsom, M.D.
NPI 1063604338 · Rheumatology Physician · Missoula, MT
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rebecca Belsom, M.D. is a Rheumatology Physician provider in Missoula, MT (NPI 1063604338).
Provider details
- NPI number
- 1063604338
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 35741 (MT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,706 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 849 | $125 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 750 | $61 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 352 | $9 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 291 | $14 |
| Administration of Chemotherapy Into Vein, Each Additional Hour96415 | 107 | $27 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 90 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 616 | 164 |
| Methotrexate Sodiumbrand: Methotrexate | 560 | 131 |
| Prednisone | 400 | 100 |
| Gabapentin | 206 | 42 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 181 | 24 |
| Leflunomide | 157 | 39 |
| Etanercept |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$849 across 45 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-08-10
- Last updated
- 2021-06-21
- Certified
- 2021-06-21
Frequently asked questions
- What is Rebecca Belsom's NPI number?
- Rebecca Belsom's National Provider Identifier (NPI) is 1063604338, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rebecca Belsom's specialty?
- Rebecca Belsom is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Rebecca Belsom located?
- Rebecca Belsom's practice location on file with NPPES is 500 W Broadway St, Missoula, MT 59802-4008.
- What is Rebecca Belsom's phone number?
- The practice phone number listed in the NPPES registry for Rebecca Belsom is (406) 721-5600.
- Does Rebecca Belsom accept Medicare?
- Rebecca Belsom is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rebecca Belsom's NPI active?
- Yes — Rebecca Belsom's NPI (1063604338) is active in the NPPES registry as of the last update on 2021-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.