Doctor profile · Federal record

Dr. Rebecca Belsom, M.D.

Rheumatology Physician (CMS: Rheumatology) · Missoula, MT

  • NPI 1063604338
  • Accepts Medicare
  • 19 yrs in practice
  • Female
  • Solo practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
500 W Broadway St
Missoula, MT 598024008
(406) 721-5600
fax (406) 721-3907
Mailing address
Po Box 7609
Missoula, MT 598077609

Credentials & registration

NPPES · NUCC
NPI registered
August 2007 — 19 yrs on file
Profile last updated
June 21, 2021
Year of graduation
2007 — 19 yrs since
Specialty taxonomy
207RR0500X — NUCC code
State license (1)
Montana #35741

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1063604338. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
159,899
Distinct HCPCS
10
Medicare allowed
$1,797,357
HCPCS Description Services Patients Avg allowed
J3262 Injection, tocilizumab, 1 mg 108,148 33 $6
J1602 Injection, golimumab, 1 mg, for intravenous use 36,799 63 $13
J0129 Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) 10,925 26 $42
J0897 Injection, denosumab, 1 mg 1,440 19 $23
99214 Established patient office or other outpatient visit, 30-39 minutes 720 352 $126
96365 Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less 589 144 $64
36415 Insertion of needle into vein for collection of blood sample 305 122 $8
96372 Injection of drug or substance under skin or into muscle 208 34 $14
99213 Established patient office or other outpatient visit, 20-29 minutes 152 131 $90
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg 112 18 $1

In context: peer comparison

Among 3 peers in this city , average services per provider: 5,390. This provider delivers 30× the peer median.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$849
Transactions
45
Manufacturers
12
Payer (manufacturer) Industry Txns Amount
ABBVIE INC. 14 $283.99
PFIZER INC. 11 $185.63
GlaxoSmithKline, LLC. 6 $117.43
Novartis Pharmaceuticals Corporation 5 $82.66
UCB, Inc. 1 $35.06
Lilly USA, LLC 2 $33.95
Genentech USA, Inc. 1 $20.22
Fresenius Kabi USA, LLC 1 $19.89
Kiniksa Pharmaceuticals International, plc 1 $19.33
SOBI, INC 1 $19.25
Amgen Inc. 1 $18.04
Biogen, Inc. 1 $13.96

By nature of payment

Food and Beverage
$830
Education
$19

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
2,619
Patients
594
Total drug cost
$2,018,681
Drug Type Claims Patients Total cost
Hydroxychloroquine Sulfate Generic 528 131 $30,005
Methotrexate (Methotrexate Sodium) Brand 461 106 $17,797
Prednisone Generic 340 89 $4,253
Gabapentin Generic 159 32 $3,113
Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) Brand 135 27 $2,967
Alendronate Sodium Generic 134 27 $1,294
Enbrel Sureclick (Etanercept) Brand 134 16 $1,027,817
Leflunomide Generic 134 33 $9,798
Humira(Cf) Pen (Adalimumab) Brand 98 11 $904,116
Allopurinol Generic 97 26 $1,658

Frequently asked questions

Auto-generated from federal data
What is Dr. Rebecca Belsom's medical specialty?
Dr. Rebecca Belsom practices Rheumatology Physician in Missoula, MT.
Where does Dr. Rebecca Belsom practice?
Dr. Rebecca Belsom practices at 500 W Broadway St, Missoula, MT 598024008. Office phone: 4067215600.
What is Dr. Rebecca Belsom's NPI?
Dr. Rebecca Belsom's National Provider Identifier (NPI) is 1063604338, issued by NPPES.
Does Dr. Rebecca Belsom accept Medicare assignment?
Yes. Dr. Rebecca Belsom accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Rebecca Belsom commonly perform?
Top Medicare-reported procedures in 2023: Injection, tocilizumab, 1 mg (HCPCS J3262); Injection, golimumab, 1 mg, for intravenous use (HCPCS J1602); Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) (HCPCS J0129). Source: CMS Medicare Physician & Other Practitioners file.