Karen Seiter, M.D.
NPI 1265494124 · Hematology & Oncology Physician · Hawthorne, NY
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Seiter, M.D. is a Hematology & Oncology Physician provider in Hawthorne, NY (NPI 1265494124).
Provider details
- NPI number
- 1265494124
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 83187 (CT)
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
20 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
1,422 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 584 | $143 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 346 | $130 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 299 | $86 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 | 61 | $27 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 37 | $101 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Acyclovir | 115 | 42 |
| Lenalidomidebrand: Revlimid | 84 | 13 |
| Ruxolitinib Phosphatebrand: Jakafi | 52 | — |
| Fluconazole | 46 | 21 |
| Zanubrutinibbrand: Brukinsa | 37 | — |
| Venetoclaxbrand: Venclexta | 37 | — |
| Ciprofloxacin Hcl | 35 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$48,855 across 38 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
- 2006-04-05
- Last updated
- 2025-10-10
- Certified
- 2025-10-10
Frequently asked questions
- What is Karen Seiter's NPI number?
- Karen Seiter's National Provider Identifier (NPI) is 1265494124, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Seiter's specialty?
- Karen Seiter is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Seiter located?
- Karen Seiter's practice location on file with NPPES is 19 Bradhurst Ave, Hawthorne, NY 10532-2140.
- What is Karen Seiter's phone number?
- The practice phone number listed in the NPPES registry for Karen Seiter is (914) 493-8375.
- Does Karen Seiter accept Medicare?
- Karen Seiter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Seiter's NPI active?
- Yes — Karen Seiter's NPI (1265494124) is active in the NPPES registry as of the last update on 2025-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.