Lisa Flaum, MD
NPI 1740261262 · Hematology & Oncology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lisa Flaum, MD is a Hematology & Oncology Physician provider in Chicago, IL (NPI 1740261262).
Provider details
- NPI number
- 1740261262
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036103768 (IL)
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
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
1,648 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 | 506 | $132 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 200 | $16 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 182 | $132 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 138 | $17 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 123 | $93 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 585 | 165 |
| Letrozole | 204 | 65 |
| Exemestane | 77 | 19 |
| Alendronate Sodium | 49 | 12 |
| Palbociclibbrand: Ibrance | 44 | — |
| Gabapentin | 17 | — |
| Tamoxifen Citrate | 15 | — |
| Prochlorperazine Maleate | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$59,513 across 55 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
- 2005-11-10
- Last updated
- 2013-03-15
Frequently asked questions
- What is Lisa Flaum's NPI number?
- Lisa Flaum's National Provider Identifier (NPI) is 1740261262, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lisa Flaum's specialty?
- Lisa Flaum is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Lisa Flaum located?
- Lisa Flaum's practice location on file with NPPES is 676 N Saint Clair St, Chicago, IL 60611-2927.
- What is Lisa Flaum's phone number?
- The practice phone number listed in the NPPES registry for Lisa Flaum is (312) 664-5400.
- Does Lisa Flaum accept Medicare?
- Lisa Flaum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lisa Flaum's NPI active?
- Yes — Lisa Flaum's NPI (1740261262) is active in the NPPES registry as of the last update on 2013-03-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.