Walter Fairfax, MD
NPI 1124170170 · Critical Care Medicine (Internal Medicine) Physician · Coeur D Alene, ID
Enrolled with Medicare as Practitioner - Sleep Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Walter Fairfax, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Coeur D Alene, ID (NPI 1124170170).
Provider details
- NPI number
- 1124170170
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- M11477 (ID)
Specialties & taxonomies
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,475 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 603 | $63 |
| Home Sleep Test (hst) With Type III Portable Monitor, Unattended; Minimum of 4 Channels: 2 Respiratory Movement/Airflow, 1 Ecg/Heart Rate and 1 Oxygen SaturationG0399 | 473 | $44 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 156 | $77 |
| Sleep Study in Sleep Lab With Continuous Airway Pressure (6 Years Or Older)95811 | 134 | $115 |
| Sleep Study in Sleep Lab (6 Years Or Older)95810 | 67 | $113 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 119 | 24 |
| Gabapentin | 55 | 22 |
| Modafinil | 51 | 15 |
| Zolpidem Tartrate | 47 | 13 |
| Armodafinil | 24 | — |
| Trazodone Hcl | 24 | — |
| Suvorexantbrand: Belsomra | 24 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-18
- Last updated
- 2024-04-16
- Certified
- 2024-04-16
Frequently asked questions
- What is Walter Fairfax's NPI number?
- Walter Fairfax's National Provider Identifier (NPI) is 1124170170, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Fairfax's specialty?
- Walter Fairfax is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Walter Fairfax located?
- Walter Fairfax's practice location on file with NPPES is 2003 Kootenai Health Way, Coeur D Alene, ID 83814-6051.
- What is Walter Fairfax's phone number?
- The practice phone number listed in the NPPES registry for Walter Fairfax is (208) 625-4000.
- Does Walter Fairfax accept Medicare?
- Walter Fairfax is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Walter Fairfax's NPI active?
- Yes — Walter Fairfax's NPI (1124170170) is active in the NPPES registry as of the last update on 2024-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.