Corey O'Brien, M.D.
NPI 1871940312 · Hospitalist Physician · Kirkland, WA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Corey O'Brien, M.D. is a Hospitalist Physician provider in Kirkland, WA (NPI 1871940312).
Provider details
- NPI number
- 1871940312
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD61134393 (WA)
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
10 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
588 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 | 323 | $81 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 98 | $119 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 79 | $121 |
| Critical Care, First 30-74 Minutes99291 | 47 | $220 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 41 | $181 |
Typical Medicare-allowed amounts for these services range $81–$220 (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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 18 | 14 |
| Prednisone | 17 | 14 |
| Furosemide | 15 | 15 |
| Metoprolol Succinate | 15 | 12 |
| Pantoprazole Sodium | 15 | 13 |
| Oxycodone Hcl | 13 | 13 |
| Atorvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-05-14
- Last updated
- 2023-03-21
- Certified
- 2023-03-21
Frequently asked questions
- What is Corey O'Brien's NPI number?
- Corey O'Brien's National Provider Identifier (NPI) is 1871940312, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Corey O'Brien's specialty?
- Corey O'Brien is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Corey O'Brien located?
- Corey O'Brien's practice location on file with NPPES is 12040 Ne 128th St, Kirkland, WA 98034-3013.
- What is Corey O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Corey O'Brien is (425) 899-1854.
- Does Corey O'Brien accept Medicare?
- Corey O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Corey O'Brien's NPI active?
- Yes — Corey O'Brien's NPI (1871940312) is active in the NPPES registry as of the last update on 2023-03-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.