Lou Mastrine, DO
NPI 1891955308 · Clinical Cardiac Electrophysiology Physician · Johnstown, PA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lou Mastrine, DO is a Clinical Cardiac Electrophysiology Physician provider in Johnstown, PA (NPI 1891955308).
Provider details
- NPI number
- 1891955308
- Entity type
- Individual
- Primary specialty
- Clinical Cardiac Electrophysiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- Yes
- License
- OS017717 (PA)
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
18 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
2,705 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 | 565 | $8 |
| Evaluation of Single, Dual, Multiple Lead Or Leadless Pacemaker System Or Implantable Defibrillator System, Remote Up to 90 Days93296 | 502 | $19 |
| Evaluation of Single, Dual, Multiple Lead Or Leadless Pacemaker System, Remote Up to 90 Days93294 | 348 | $28 |
| Evaluation of Implantable Heart and Blood Vessel Monitoring System, Remote Up to 30 Days93297 | 294 | $42 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 199 | $120 |
| Evaluation of Single, Dual, Or Multiple Lead Implantable Defibrillator System, Remote Up to 90 Days |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 51 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 829 | 179 |
| Metoprolol Succinate | 431 | 116 |
| Diltiazem Hclbrand: Diltiazem 24hr Er (cd) | 268 | 86 |
| Metoprolol Tartrate | 262 | 79 |
| Sotalol Hclbrand: Sotalol | 233 | 71 |
| Sacubitril/Valsartanbrand: Entresto | 222 | 45 |
| Furosemide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,278 across 67 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
- 2008-06-10
- Last updated
- 2015-07-06
Frequently asked questions
- What is Lou Mastrine's NPI number?
- Lou Mastrine's National Provider Identifier (NPI) is 1891955308, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lou Mastrine's specialty?
- Lou Mastrine is listed in the NPPES registry with a primary specialty of Clinical Cardiac Electrophysiology Physician (Allopathic & Osteopathic Physicians).
- Where is Lou Mastrine located?
- Lou Mastrine's practice location on file with NPPES is 1123 Franklin St, Johnstown, PA 15905-4309.
- What is Lou Mastrine's phone number?
- The practice phone number listed in the NPPES registry for Lou Mastrine is (814) 539-5340.
- Does Lou Mastrine accept Medicare?
- Lou Mastrine is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lou Mastrine's NPI active?
- Yes — Lou Mastrine's NPI (1891955308) is active in the NPPES registry as of the last update on 2015-07-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.