David Christiansen, M.D.
NPI 1811056336 · Infectious Disease Physician · Missoula, MT
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Christiansen, M.D. is a Infectious Disease Physician provider in Missoula, MT (NPI 1811056336).
Provider details
- NPI number
- 1811056336
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 5756397-1205 (UT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
804 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 260 | $77 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 142 | $116 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 112 | $177 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 82 | $127 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 81 | $169 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Doxycycline Hyclate | 100 | 27 |
| Diph,pertuss(acell),tet Vac/Pfbrand: Adacel Tdap | 88 | 88 |
| Cefuroxime Axetilbrand: Cefuroxime | 79 | 26 |
| Amoxicillin | 75 | 19 |
| Typhoid Vi Polysacch Vaccinebrand: Typhim Vi | 70 | 70 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 61 | 21 |
| Hepatitis a Virus Vaccine/Pfbrand: Havrix |
Practice location
Mailing address
Additional practice locations (1)
- 902 N Orange StMissoula, MT 59802-2928Phone: (406) 327-1732Fax: (406) 329-2621
Registry dates
- Enumerated
- 2006-12-08
- Last updated
- 2021-05-03
- Certified
- 2021-05-03
Frequently asked questions
- What is David Christiansen's NPI number?
- David Christiansen's National Provider Identifier (NPI) is 1811056336, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Christiansen's specialty?
- David Christiansen is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is David Christiansen located?
- David Christiansen's practice location on file with NPPES is 500 W Broadway St, Missoula, MT 59802-4008.
- What is David Christiansen's phone number?
- The practice phone number listed in the NPPES registry for David Christiansen is (406) 543-7271.
- Does David Christiansen accept Medicare?
- David Christiansen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Christiansen's NPI active?
- Yes — David Christiansen's NPI (1811056336) is active in the NPPES registry as of the last update on 2021-05-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.