Leslie Klein, M.D.
NPI 1619101771 · Hematology & Oncology Physician · Scottsdale, AZ
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leslie Klein, M.D. is a Hematology & Oncology Physician provider in Scottsdale, AZ (NPI 1619101771).
Provider details
- NPI number
- 1619101771
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 50658 (AZ)
Specialties & taxonomies
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
3,338 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 641 | $87 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 289 | $14 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Additional Sequential Infusion, 1 Hour Or Less96367 | 249 | $27 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 239 | $122 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 155 | $60 |
| Fluorodeoxyglucose F-18 Fdg, Diagnostic, Per Study Dose, Up to 45 MillicuriesA9552 | 150 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 191 | 57 |
| Gabapentin | 78 | 21 |
| Alendronate Sodium | 77 | 21 |
| Apixabanbrand: Eliquis | 73 | 17 |
| Acyclovir | 66 | — |
| Olanzapine | 56 | 12 |
| Rivaroxabanbrand: Xarelto | 55 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,271 across 113 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
- 2009-05-05
- Last updated
- 2022-11-15
- Certified
- 2022-11-15
Frequently asked questions
- What is Leslie Klein's NPI number?
- Leslie Klein's National Provider Identifier (NPI) is 1619101771, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leslie Klein's specialty?
- Leslie Klein is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Leslie Klein located?
- Leslie Klein's practice location on file with NPPES is 8880 E Desert Cove Ave, Scottsdale, AZ 85260-6746.
- What is Leslie Klein's phone number?
- The practice phone number listed in the NPPES registry for Leslie Klein is (480) 314-6670.
- Does Leslie Klein accept Medicare?
- Leslie Klein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leslie Klein's NPI active?
- Yes — Leslie Klein's NPI (1619101771) is active in the NPPES registry as of the last update on 2022-11-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.