Margaret Sullivan, MD
NPI 1134330178 · Cardiovascular Disease Physician · Ennis, TX
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Sullivan, MD is a Cardiovascular Disease Physician provider in Ennis, TX (NPI 1134330178).
Provider details
- NPI number
- 1134330178
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- N5421 (TX)
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
19 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
1,177 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 402 | $122 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 289 | $13 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 87 | $185 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 57 | $63 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 | 57 | $22 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 47 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 377 | 95 |
| Metoprolol Succinate | 362 | 87 |
| Sacubitril/Valsartanbrand: Entresto | 346 | 67 |
| Apixabanbrand: Eliquis | 285 | 48 |
| Losartan Potassium | 223 | 65 |
| Rosuvastatin Calcium | 154 | 39 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$217 across 12 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
- 2007-05-24
- Last updated
- 2017-08-16
Frequently asked questions
- What is Margaret Sullivan's NPI number?
- Margaret Sullivan's National Provider Identifier (NPI) is 1134330178, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Sullivan's specialty?
- Margaret Sullivan is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Sullivan located?
- Margaret Sullivan's practice location on file with NPPES is 802 W Lampasas St, Ennis, TX 75119-4536.
- What is Margaret Sullivan's phone number?
- The practice phone number listed in the NPPES registry for Margaret Sullivan is (972) 875-4700.
- Does Margaret Sullivan accept Medicare?
- Margaret Sullivan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Sullivan's NPI active?
- Yes — Margaret Sullivan's NPI (1134330178) is active in the NPPES registry as of the last update on 2017-08-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.