Ariel Kleman, M.D.
NPI 1659758050 · Hematology & Oncology Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ariel Kleman, M.D. is a Hematology & Oncology Physician provider in Milwaukee, WI (NPI 1659758050).
Provider details
- NPI number
- 1659758050
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 66587 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 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
453 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 186 | $90 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 105 | $133 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 63 | $73 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 35 | $160 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 27 | $167 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 224 | 52 |
| Apixabanbrand: Eliquis | 109 | 24 |
| Letrozole | 96 | 26 |
| Prednisone | 62 | 13 |
| Prochlorperazine Maleate | 56 | 38 |
| Ondansetron Hcl | 47 | 35 |
| Acyclovir | 46 | 11 |
| Dexamethasone | 42 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-05-05
- Last updated
- 2025-01-03
- Certified
- 2025-01-03
Frequently asked questions
- What is Ariel Kleman's NPI number?
- Ariel Kleman's National Provider Identifier (NPI) is 1659758050, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ariel Kleman's specialty?
- Ariel Kleman is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Ariel Kleman located?
- Ariel Kleman's practice location on file with NPPES is 9200 W Wisconsin Avenue, Milwaukee, WI 53207-2141.
- What is Ariel Kleman's phone number?
- The practice phone number listed in the NPPES registry for Ariel Kleman is (414) 955-8296.
- Does Ariel Kleman accept Medicare?
- Ariel Kleman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ariel Kleman's NPI active?
- Yes — Ariel Kleman's NPI (1659758050) is active in the NPPES registry as of the last update on 2025-01-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.