Karen Leiser, MD
NPI 1073689055 · Internal Medicine Physician · Harrison, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Leiser, MD is a Internal Medicine Physician provider in Harrison, NY (NPI 1073689055).
Provider details
- NPI number
- 1073689055
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 232670 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,360 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 338 | $109 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 285 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 264 | $154 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 228 | $17 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 140 | $158 |
| Annual Wellness Visit; Includes a Personalized Prevention Plan of Service (pps), Initial Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 41 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 359 | 92 |
| Losartan Potassium | 209 | 52 |
| Amlodipine Besylate | 175 | 44 |
| Rosuvastatin Calcium | 147 | 34 |
| Lisinopril | 104 | 23 |
| Hydrochlorothiazide | 101 | 26 |
| Escitalopram Oxalate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-28
- Last updated
- 2016-02-10
Frequently asked questions
- What is Karen Leiser's NPI number?
- Karen Leiser's National Provider Identifier (NPI) is 1073689055, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Leiser's specialty?
- Karen Leiser is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Leiser located?
- Karen Leiser's practice location on file with NPPES is 600 Mamaroneck Ave, Harrison, NY 10528-1635.
- What is Karen Leiser's phone number?
- The practice phone number listed in the NPPES registry for Karen Leiser is (914) 723-8100.
- Does Karen Leiser accept Medicare?
- Karen Leiser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Leiser's NPI active?
- Yes — Karen Leiser's NPI (1073689055) is active in the NPPES registry as of the last update on 2016-02-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.