Justin Karl, M.D.
NPI 1134366958 · Cardiovascular Disease Physician · Lawrenceville, NJ
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Justin Karl, M.D. is a Cardiovascular Disease Physician provider in Lawrenceville, NJ (NPI 1134366958).
Provider details
- NPI number
- 1134366958
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD451250 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
17 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
3,423 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 661 | $18 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 524 | $145 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 512 | $16 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 361 | $75 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 258 | $127 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 290 | 103 |
| Rosuvastatin Calcium | 288 | 109 |
| Atorvastatin Calcium | 259 | 93 |
| Metoprolol Tartrate | 227 | 81 |
| Losartan Potassium | 183 | 71 |
| Apixabanbrand: Eliquis | 156 | 59 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,275 across 76 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
- 2009-01-15
- Last updated
- 2014-09-08
Frequently asked questions
- What is Justin Karl's NPI number?
- Justin Karl's National Provider Identifier (NPI) is 1134366958, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Justin Karl's specialty?
- Justin Karl is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Justin Karl located?
- Justin Karl's practice location on file with NPPES is 3140 Princeton Pike, Lawrenceville, NJ 08648-2330.
- What is Justin Karl's phone number?
- The practice phone number listed in the NPPES registry for Justin Karl is (609) 895-1919.
- Does Justin Karl accept Medicare?
- Justin Karl is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Justin Karl's NPI active?
- Yes — Justin Karl's NPI (1134366958) is active in the NPPES registry as of the last update on 2014-09-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.