1. Home
  2. Directory
  3. Indiana
  4. Michigan City
  5. Internal Medicine
  6. NPI Profile

SAMI ATASSI MD
NPI 1801830534
Internal Medicine - Hematology & Oncology in Michigan City, IN

Active since June 15, 2006PECOS EnrolledAccepts Medicare Assignment
8955 W 400 N, MICHIGAN CITY, IN 46360(219) 861-5800(219) 861-5543 Get Directions Write a Review

NPPES record last updated: July 9, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 9, 2024, Apr 11, 2024, May 8, 2023 and 5 more (8 updates tracked since 2016).

About Sami Atassi Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SAMI ATASSI MD (NPI 1801830534) is an individual hematology & oncology provider in Michigan City, Indiana, licensed in Indiana (01060203A) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Franciscan Health Michigan City, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1801830534
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameSAMI ATASSICredential: MD
Location Address8955 W 400 NMichigan City, IN 46360-9330
Mailing AddressPo Box 781076 Ste 400Detroit, MI 48278-0001 · (317) 528-4800
Phone(219) 861-5800
Fax(219) 861-5543
Sole ProprietorNo
Medical School CMSOtherGraduated 1985
Enumeration DateJune 15, 2006
Last NPPES UpdateJuly 9, 20248 updates tracked since enumeration
NPPES CertifiedJuly 9, 2024
✔ NPI 1801830534 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Licenses✔ Licensed in IN · 01060203A✔ Licensed in IL · 036.091724
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedInternal Medicine · HematologyTaxonomy 207RH0000X · License 47734 (IA)
8955 W 400 N, Michigan City, IN 46360
Open in Google Maps ↗

Secondary Practice Locations 3

Location 12600 S Michigan Ave Ste 308Chicago, IL 60616-0049 · Phone (312) 326-6666
Location 2621 Memorial Dr Ste 100South Bend, IN 46601-1063 · Phone (574) 647-1100 · Fax (574) 647-5907
Location 31400 Pin Oak DrCarterville, IL 62918-1600 · Phone (618) 985-3333 · Fax (618) 985-1318

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Sami Atassi Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID42276669
PECOS Enrollment IDI20090825000503
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Sami Atassi reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Franciscan Physician Network
34 mi
Urgent Care
1515 W DRAGOON TRL
Mishawaka, IN 46544
  • Reassigned Medicare billing, Indiana enrollment
  • 1,396 clinicians in this Medicare group
NPI 1366879009 (574) 254-6253
Rockford Health Physicians
117 mi
Multi-Specialty
8201 E RIVERSIDE BLVD
Rockford, IL 61114
  • Reassigned Medicare billing, Illinois enrollment
  • 1,375 clinicians in this Medicare group
NPI 1043242886 (608) 314-2428
Sarah Bush Lincoln Health Center
168 mi
Family Medicine
1000 HEALTH CENTER DR
Mattoon, IL 61938
  • Reassigned Medicare billing, Illinois enrollment
  • 652 clinicians in this Medicare group
NPI 1568581379 (217) 258-2525
Springfield Clinic, LLP
194 mi
Rural Health
600 N MAIN ST
Taylorville, IL 62568
  • Reassigned Medicare billing, Illinois enrollment
  • 65 clinicians in this Medicare group
NPI 1235316191 (217) 287-8855

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
158 services127 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
87 services42 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
65 services35 patients
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221
Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.
23 services22 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
23 services23 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Franciscan Health Michigan City

Acute Care Hospitals · Michigan City, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number150015
Location3500 Franciscan WayMichigan City, IN 46360 · La Porte County
Emergency services Birthing friendly

Franciscan Health Lafayette

Acute Care Hospitals · Lafayette, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number150109
Location1701 S Creasy LnLafayette, IN 47905 · Tippecanoe County
Emergency services Birthing friendly

Indiana University Health Arnett Hospital

Acute Care Hospitals · Lafayette, IN
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150173
Location5165 Mccarty LnLafayette, IN 47905 · Tippecanoe County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 46360 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$161.76 typical visit price
range $53.07 – $161.76
Typical copayment $40.44 (range $13.26 – $40.44)
Most-billed visit code 99205
Established Patient
$94.22 typical visit price
range $16.93 – $132.22
Typical copayment $23.55 (range $4.23 – $33.05)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
100%22 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 7

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALLISON ELISE KINDER ANP-BC
Nurse Practitioner
8955 W 400 N
MICHIGAN CITY, IN 46360
Laporte County (219) 861-5544
MS. MALAVIKA PRASEED MCGRAIL LCGC
Genetic Counselor, MS
8955 W 400 N
MICHIGAN CITY, IN 46360
Laporte County (219) 861-5800
JACQUELINE JOHNSON PA-C
Physician Assistant
8955 W 400 N
MICHIGAN CITY, IN 46360
Laporte County (219) 861-5800
DR. SANJIV S MODI MD
Internal Medicine (Hematology & Oncology)
8955 W 400 N
MICHIGAN CITY, IN 46360
Laporte County (219) 861-5800
MESHAAL KHAN
Internal Medicine (Hematology & Oncology)
8955 W 400 N
MICHIGAN CITY, IN 46360
Laporte County (219) 861-5800
DR. WILLIAM HAN BAE MD
Internal Medicine (Hematology & Oncology)
8955 W 400 N
MICHIGAN CITY, IN 46360
Laporte County (219) 861-5800
ALICIA S ROTHCHILD APRN, FNP-BC, NP-C
Nurse Practitioner (Family)
8955 W 400 N
MICHIGAN CITY, IN 46360
Laporte County (219) 861-5800

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sami Atassi's NPI number?

The NPI number for Sami Atassi is 1801830534. It was assigned to this individual provider in the NPPES registry on June 15, 2006.

Where is Sami Atassi located?

Sami Atassi practices at 8955 W 400 N, Michigan City, IN 46360. The listed phone number is (219) 861-5800.

What is Sami Atassi's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Sami Atassi enrolled in Medicare?

Yes. Sami Atassi is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Sami Atassi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sami Atassi reassigns Medicare benefits to 4 organizations: Franciscan Physician Network (Mishawaka, IN), Rockford Health Physicians (Rockford, IL), Sarah Bush Lincoln Health Center (Mattoon, IL) and Springfield Clinic, LLP (Taylorville, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Sami Atassi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sami Atassi accept?

Health plans from Anthem Blue Cross and Blue Shield and CareSource list Sami Atassi as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Sami Atassi affiliated with any hospitals?

According to CMS data, Sami Atassi is affiliated with Franciscan Health Michigan City, Franciscan Health Lafayette and Indiana University Health Arnett Hospital.

When was this NPI record last updated?

The NPPES record for Sami Atassi was last updated on July 9, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.