Sami Atassi, MD
NPI 1801830534 · Hematology & Oncology Physician · Michigan City, IN
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sami Atassi, MD is a Hematology & Oncology Physician provider in Michigan City, IN (NPI 1801830534).
Provider details
- NPI number
- 1801830534
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 47734 (IA)
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
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
356 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 | 158 | $61 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 87 | $75 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 65 | $46 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 23 | $76 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 23 | $126 |
Typical Medicare-allowed amounts for these services range $46–$126 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Letrozole | 19 |
| Rivaroxabanbrand: Xarelto | 17 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 16 |
| Anastrozole | 13 |
| Prednisone | 12 |
| Prochlorperazine Maleate | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (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
Additional practice locations (3)
- 1400 Pin Oak DrCarterville, IL 62918-1600Phone: (618) 985-3333Fax: (618) 985-1318
- 2600 S Michigan Ave Ste 308Chicago, IL 60616-0049Phone: (312) 326-6666
- 621 Memorial Dr Ste 100South Bend, IN 46601-1063Phone: (574) 647-1100Fax: (574) 647-5907
Registry dates
- Enumerated
- 2006-06-15
- Last updated
- 2024-07-09
- Certified
- 2024-07-09
Frequently asked questions
- What is Sami Atassi's NPI number?
- Sami Atassi's National Provider Identifier (NPI) is 1801830534, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sami Atassi's specialty?
- Sami Atassi is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Sami Atassi located?
- Sami Atassi's practice location on file with NPPES is 8955 W 400 N, Michigan City, IN 46360-9330.
- What is Sami Atassi's phone number?
- The practice phone number listed in the NPPES registry for Sami Atassi is (219) 861-5800.
- Does Sami Atassi accept Medicare?
- Sami Atassi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sami Atassi's NPI active?
- Yes — Sami Atassi's NPI (1801830534) is active in the NPPES registry as of the last update on 2024-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.