Mark Chou, D.O.
NPI 1578854543 · Cardiovascular Disease Physician · Loma Linda, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Chou, D.O. is a Cardiovascular Disease Physician provider in Loma Linda, CA (NPI 1578854543).
Provider details
- NPI number
- 1578854543
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- DR.0064783 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,338 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 422 | $8 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 147 | $14 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 122 | $179 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 93 | $127 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 80 | $196 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 277 | 96 |
| Atorvastatin Calcium | 235 | 84 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 153 | 58 |
| Apixabanbrand: Eliquis | 129 | 38 |
| Metoprolol Succinate | 119 | 43 |
| Metoprolol Tartrate | 106 | 43 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$798 across 26 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-04-26
- Last updated
- 2020-08-04
- Certified
- 2020-08-04
Frequently asked questions
- What is Mark Chou's NPI number?
- Mark Chou's National Provider Identifier (NPI) is 1578854543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Chou's specialty?
- Mark Chou is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Chou located?
- Mark Chou's practice location on file with NPPES is 11234 Anderson Street, Gme Office Csp 21005, Loma Linda, CA 92354-2804.
- What is Mark Chou's phone number?
- The practice phone number listed in the NPPES registry for Mark Chou is (909) 558-7263.
- Does Mark Chou accept Medicare?
- Mark Chou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Chou's NPI active?
- Yes — Mark Chou's NPI (1578854543) is active in the NPPES registry as of the last update on 2020-08-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.