Karen Kostroff, MD
NPI 1083762751 · Surgery Physician · Lake Success, NY
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Kostroff, MD is a Surgery Physician provider in Lake Success, NY (NPI 1083762751).
Provider details
- NPI number
- 1083762751
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 1429101 (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
1,254 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 | 1,044 | $99 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 61 | $239 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 49 | $182 |
| Partial Removal of Breast19301 | 39 | $713 |
| Biopsy Or Removal of Deep Lymph Nodes of Underarm38525 | 24 | $247 |
| Injection of Radioactive Material for X-Ray Identification of Lymph Node38792 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 60 | 19 |
| Letrozole | 20 | — |
| Exemestane | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-08
- Last updated
- 2011-07-25
Frequently asked questions
- What is Karen Kostroff's NPI number?
- Karen Kostroff's National Provider Identifier (NPI) is 1083762751, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Kostroff's specialty?
- Karen Kostroff is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Kostroff located?
- Karen Kostroff's practice location on file with NPPES is 2001 Marcus Ave, Lake Success, NY 11042.
- What is Karen Kostroff's phone number?
- The practice phone number listed in the NPPES registry for Karen Kostroff is (516) 775-7676.
- Does Karen Kostroff accept Medicare?
- Karen Kostroff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Kostroff's NPI active?
- Yes — Karen Kostroff's NPI (1083762751) is active in the NPPES registry as of the last update on 2011-07-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.