Gregory St. John, M.D.
NPI 1124023056 · Cardiovascular Disease Physician · Hot Springs, AR
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory St. John, M.D. is a Cardiovascular Disease Physician provider in Hot Springs, AR (NPI 1124023056).
Provider details
- NPI number
- 1124023056
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- C-7977 (AR)
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
21 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
3,203 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 | 436 | $63 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 346 | $81 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 269 | $7 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 204 | $115 |
| Exercise Or Drug-Induced Heart Stress Test With Electrocardiogram (ecg) With Supervision By Physician93016 | 187 | $19 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clopidogrel Bisulfatebrand: Clopidogrel | 251 | 117 |
| Atorvastatin Calcium | 198 | 70 |
| Apixabanbrand: Eliquis | 176 | 38 |
| Spironolactone | 175 | 52 |
| Metoprolol Tartrate | 127 | 40 |
| Carvedilol | 124 | 36 |
| Propafenone Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$213 across 10 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
- 2005-06-16
- Last updated
- 2015-01-27
Frequently asked questions
- What is Gregory St. John's NPI number?
- Gregory St. John's National Provider Identifier (NPI) is 1124023056, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory St. John's specialty?
- Gregory St. John is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory St. John located?
- Gregory St. John's practice location on file with NPPES is 130 Medical Park Pl, Hot Springs, AR 71901-8051.
- What is Gregory St. John's phone number?
- The practice phone number listed in the NPPES registry for Gregory St. John is (501) 625-3400.
- Does Gregory St. John accept Medicare?
- Gregory St. John is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory St. John's NPI active?
- Yes — Gregory St. John's NPI (1124023056) is active in the NPPES registry as of the last update on 2015-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.