Edward O'Regan, M.D.
NPI 1972543379 · Hospitalist Physician · Chico, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Edward O'Regan, M.D. is a Hospitalist Physician provider in Chico, CA (NPI 1972543379).
Provider details
- NPI number
- 1972543379
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A44337 (CA)
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
20 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
1,151 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 | 538 | $72 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 356 | $108 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 88 | $105 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 84 | $74 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 74 | $158 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 |
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 |
|---|---|---|
| Isosorbide Mononitratebrand: Isosorbide Mononitrate Er | 20 | — |
| Atorvastatin Calcium | 16 | — |
| Apixabanbrand: Eliquis | 16 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 14 | 13 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 13 | — |
| Spironolactone | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-07
- Last updated
- 2007-07-08
Frequently asked questions
- What is Edward O'Regan's NPI number?
- Edward O'Regan's National Provider Identifier (NPI) is 1972543379, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Edward O'Regan's specialty?
- Edward O'Regan is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Edward O'Regan located?
- Edward O'Regan's practice location on file with NPPES is 1531 Esplanade, Chico, CA 95926-3310.
- What is Edward O'Regan's phone number?
- The practice phone number listed in the NPPES registry for Edward O'Regan is (530) 896-7455.
- Does Edward O'Regan accept Medicare?
- Edward O'Regan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Edward O'Regan's NPI active?
- Yes — Edward O'Regan's NPI (1972543379) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.