Internal Medicine, Infectious Disease · Missoula, MT
NPI
1811056336
Since 2006
Specialty
Internal Medicine, Infectious Disease
Code 207RI0200X
Group practices
1
Medicare group memberships
Hospitals
5
Hospital affiliations
500 W Broadway St
Missoula, MT, 59802
Phone (406) 543-7271
Groups this clinician bills Medicare through
Medicare paid, 2024
$73K
840 services
Medicare patients, 2024
248
Average age 73
Drug cost, 2024
$352K
1,122 prescriptions
Company payments, 2025
$27.36
From 1 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by David C Christiansen was code 99232 (hospital e&m - subsequent), 260 times for 113 patients. In total David C Christiansen billed 840 services in 21 codes, and Medicare paid $73K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2021-05-03.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99232 Hospital E&M - Subsequent | Facility | 260 | 113 | $60.99 | $16K |
| 99233 Hospital E&M - Subsequent | Facility | 142 | 75 | $91.49 | $13K |
| 99215 Office E&M - Established | Office | 112 | 66 | $128.59 | $14K |
| 99214 Office E&M - Established | Office | 82 | 53 | $91.20 | $7,478 |
| 99223 Hospital E&M - Initial | Facility | 81 | 80 | $131.24 | $11K |
| 99231 Hospital E&M - Subsequent | Facility | 48 | 31 | $38.61 | $1,853 |
| 99213 Office E&M - Established | Office | 40 | 31 | $61.39 | $2,456 |
| 99239 Hospital Discharge Management | Facility | 14 | 14 | $89.40 | $1,252 |
| 99222 Hospital E&M - Initial | Facility | 13 | 13 | $94.09 | $1,223 |
| 99205 Office E&M - New | Office | 12 | 12 | $152.27 | $1,827 |
By year: 2022 $70K for 816 services; 2023 $73K for 818 services; 2024 $73K for 840 services.
Medicare prescription drug claims, 2024
In 2024, the drug David C Christiansen prescribed most often to Medicare patients was Doxycycline Hyclate, with 100 prescriptions and refills. In total David C Christiansen wrote 1,122 Medicare prescriptions that cost $352K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Doxycycline Hyclate Generic | 100 | 136 | 27 | $2,809 |
| Adacel Tdap Diph,pertuss(Acell),tet Vac/Pf | 88 | 88 | 88 | $6,260 |
| Cefuroxime Cefuroxime Axetil | 79 | 101 | 26 | $3,175 |
| Amoxicillin Generic | 75 | 144 | 19 | $1,396 |
| Typhim Vi Typhoid Vi Polysacch Vaccine | 70 | 70 | 70 | $8,326 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 61 | 65 | 21 | $2,214 |
| Havrix Hepatitis A Virus Vaccine/Pf | 59 | 59 | 53 | $6,337 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 53 | 57 | Under 11 | $1,184 |
| Abrysvo Rsv Vacc, Pref A And Pref B/Pf | 48 | 48 | 48 | $16K |
| Ceftriaxone Ceftriaxone Sodium | 40 | 40 | Under 11 | $697 |
| Heplisav-B Hepatitis B Vaccine/Cpg1018/Pf | 38 | 38 | 25 | $6,361 |
| Cefadroxil Generic | 37 | 48 | 12 | $2,647 |
| Shingrix Varicella-Zoster Ge/As01b/Pf | 37 | 37 | 34 | $8,311 |
| Cephalexin Generic | 26 | 44 | Under 11 | $731 |
| Potassium Chloride Generic | 20 | 20 | Under 11 | $152 |
Brand drugs: 461 claims; generic drugs: 661 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid David C Christiansen $27.36 ($27.36 in general payments such as food, travel and fees) from 1 company. The largest payer was Insmed, Inc. with $27.36.
| Company | Payments | Amount |
|---|---|---|
| Insmed, Inc. INSM | 1 | $27.36 |
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.