Regina Chiu, M.D.
NPI 1043272693 · Cardiovascular Disease Physician · O Fallon, IL
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Regina Chiu, M.D. is a Cardiovascular Disease Physician provider in O Fallon, IL (NPI 1043272693).
Provider details
- NPI number
- 1043272693
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036118748 (IL)
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
4,169 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 1,037 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 422 | $129 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 403 | $17 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 355 | $69 |
| Evaluation of Single, Dual, Multiple Lead Or Leadless Pacemaker System Or Implantable Defibrillator System, Remote Up to 90 Days93296 | 172 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 63 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 681 | 207 |
| Amlodipine Besylate | 464 | 139 |
| Atorvastatin Calcium | 445 | 128 |
| Lisinopril | 411 | 119 |
| Apixabanbrand: Eliquis | 410 | 84 |
| Furosemide | 341 | 122 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-06
- Last updated
- 2021-12-20
- Certified
- 2021-12-20
Frequently asked questions
- What is Regina Chiu's NPI number?
- Regina Chiu's National Provider Identifier (NPI) is 1043272693, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Regina Chiu's specialty?
- Regina Chiu is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Regina Chiu located?
- Regina Chiu's practice location on file with NPPES is Three Saint Elizabeth Blvd Ste 2800, O Fallon, IL 62269-1282.
- What is Regina Chiu's phone number?
- The practice phone number listed in the NPPES registry for Regina Chiu is (618) 233-6044.
- Does Regina Chiu accept Medicare?
- Regina Chiu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Regina Chiu's NPI active?
- Yes — Regina Chiu's NPI (1043272693) is active in the NPPES registry as of the last update on 2021-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.