Leslie Klein, M.D.
Hematology & Oncology Physician · Scottsdale, AZ
Leslie Klein, M.D. is a hematology & oncology physician with a practice address in Scottsdale, Arizona, and NPI 1619101771, issued on May 5, 2009. Check the license (Arizona 50658, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Leslie Klein
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 50658 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 8880 E Desert Cove Ave, Scottsdale, AZ 85260
- Phone
- (480) 314-6670
- Enumerated
- May 5, 2009
- Record last updated
- Nov 15, 2022
- Fax
- (480) 257-1997
- Medicaid ID
- 038068 AZ
- Medicare enrollment
- Enrolled (PECOS I20150820010154); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 285 in Arizona → Look up another NPI →
Also registered at 8880 E Desert Cove Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aaron Ambrad, MDRadiation Oncology Physician1265411961
- Rakesh Bagai, M.D.Hematology & Oncology Physician1114182888
- Jaclyn BeamFamily Nurse Practitioner1326859315
- Cynthia Carsten, MSN, NPAcute Care Nurse Practitioner1629449293
- Theresa Chan, M.D.Surgery Physician1669810156
- Ammoren Dohm, MDRadiation Oncology Physician1831599380
Verify Leslie Klein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 50658Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,376 Medicare Part D claims for 220 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims. 27 claims were for opioids.
Most prescribed
- Anastrozole191 claims
- Gabapentin78 claims
- Alendronate Sodium77 claims
- Eliquis73 claims
- Acyclovir66 claims
- Olanzapine56 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 93.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,271.40
113 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Ironwood Physicians PCScottsdale, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leslie Klein among 285 hematology & oncology physician records in Arizona
Leslie Klein, M.D. is one of 285 hematology & oncology physician records with a practice address in Arizona. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 61% of them.
- NPI issued2009 · 61% of these records are older, 34% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated2009 · median 2003 among the 229 with a school on file
- Record last updated2022 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Arizona
There are 285 hematology & oncology physician records in Arizona.
All 285 in Arizona → Every provider in Scottsdale → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Rakesh Bagai, M.D.Scottsdale, AZ 852601114182888
- Tara Iyengar, M.D.Scottsdale, AZ 852601922217660
- Jasleen Khanuja, MDScottsdale, AZ 852601871936799
- Rajesh Kukunoor, M.D.Scottsdale, AZ 852601346214384
- Ramesh Ramanathan, MDScottsdale, AZ 852601427023548
- Gayle Roberts, MDScottsdale, AZ 852601689648305
- Kenneth Barker, MDScottsdale, AZ 852591306581004
- Ryan Brown, MDScottsdale, AZ 852591154016061
Common questions
What is Leslie Klein, M.D.'s NPI number?
Leslie Klein, M.D.'s National Provider Identifier (NPI) is 1619101771, issued on May 5, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Leslie Klein, M.D. located?
The NPPES record lists a practice address at 8880 E Desert Cove Ave, Scottsdale, AZ, 85260. Phone: (480) 314-6670. Providers update this record themselves, so call before visiting.
How can I verify Leslie Klein, M.D.'s license?
NPPES lists Arizona license number 50658, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leslie Klein, M.D. prescribe under Medicare Part D?
In 2024, Leslie Klein, M.D. had 1,376 Medicare Part D claims for 220 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Leslie Klein, M.D.'s MIPS final score?
The 2023 MIPS final score is 93.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.