Liam O'Sullivan, M.D.
NPI 1639431133 · Emergency Medicine Physician · Wenatchee, WA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Liam O'Sullivan, M.D. is a Emergency Medicine Physician provider in Wenatchee, WA (NPI 1639431133).
Provider details
- NPI number
- 1639431133
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- R73282 (AZ)
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
14 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
515 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 270 | $166 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 178 | $116 |
| Critical Care, First 30-74 Minutes99291 | 55 | $202 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 12 | $69 |
Typical Medicare-allowed amounts for these services range $69–$202 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Morphine Sulfate | 30 | 30 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 19 | 19 |
| Cephalexin | 19 | 19 |
| Prednisone | 18 | 18 |
| Hydromorphone Hcl | 17 | 17 |
| Ondansetronbrand: Ondansetron Odt | 17 | 17 |
| Cefpodoxime Proxetil | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-06-11
- Last updated
- 2015-11-03
Frequently asked questions
- What is Liam O'Sullivan's NPI number?
- Liam O'Sullivan's National Provider Identifier (NPI) is 1639431133, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Liam O'Sullivan's specialty?
- Liam O'Sullivan is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Liam O'Sullivan located?
- Liam O'Sullivan's practice location on file with NPPES is 1201 S Miller St, Wenatchee, WA 98801-3201.
- What is Liam O'Sullivan's phone number?
- The practice phone number listed in the NPPES registry for Liam O'Sullivan is (509) 663-8711.
- Does Liam O'Sullivan accept Medicare?
- Liam O'Sullivan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Liam O'Sullivan's NPI active?
- Yes — Liam O'Sullivan's NPI (1639431133) is active in the NPPES registry as of the last update on 2015-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.