Dennis Grewal, DO
NPI 1538556592 · Cardiovascular Disease Physician · Santa Ana, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dennis Grewal, DO is a Cardiovascular Disease Physician provider in Santa Ana, CA (NPI 1538556592).
Provider details
- NPI number
- 1538556592
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 15476 (CA)
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 tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,345 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) |
|---|---|---|
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 472 | $68 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 104 | $131 |
| Ultrasound of Heart Blood Flow, Valves and Chambers93320 | 64 | $18 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 64 | $79 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 54 | $15 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate and Valve Function |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 249 | 105 |
| Metoprolol Succinate | 184 | 68 |
| Apixabanbrand: Eliquis | 110 | 32 |
| Losartan Potassium | 105 | 40 |
| Carvedilol | 91 | 33 |
| Amlodipine Besylate | 87 | 31 |
| Sacubitril/Valsartanbrand: Entresto |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,718 across 15 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
Additional practice locations (1)
- 16300 Sand Canyon Ave Ste 201Irvine, CA 92618-3712Phone: (949) 753-9150Fax: (949) 753-9152
Registry dates
- Enumerated
- 2015-04-16
- Last updated
- 2025-04-07
- Certified
- 2025-04-07
Frequently asked questions
- What is Dennis Grewal's NPI number?
- Dennis Grewal's National Provider Identifier (NPI) is 1538556592, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis Grewal's specialty?
- Dennis Grewal is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Dennis Grewal located?
- Dennis Grewal's practice location on file with NPPES is 700 N Tustin Ave, Santa Ana, CA 92705-3602.
- What is Dennis Grewal's phone number?
- The practice phone number listed in the NPPES registry for Dennis Grewal is (714) 245-1444.
- Does Dennis Grewal accept Medicare?
- Dennis Grewal is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dennis Grewal's NPI active?
- Yes — Dennis Grewal's NPI (1538556592) is active in the NPPES registry as of the last update on 2025-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.