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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARK HAZEM SAHLOL
NPI 1184930604
Internal Medicine in Dyer, IN

Active since August 21, 2010PECOS Enrolled
24 JOLIET ST, DYER, IN 46311(219) 852-1524(219) 933-2288 Get Directions Write a Review

NPPES record last updated: October 21, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 18, 2026, Mar 7, 2023, Oct 14, 2022 and 6 more (9 updates tracked since 2017).

About Mark Hazem Sahlol NPPES

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

MARK HAZEM SAHLOL (NPI 1184930604) is an individual internal medicine provider in Dyer, Indiana, licensed in Indiana (01075458A) and active in the NPI registry since August 2010. He is enrolled in Medicare PECOS, is affiliated with Methodist Hospitals Inc, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1184930604
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameMARK HAZEM SAHLOL
Location Address24 JOLIET STDyer, IN 46311-1705
Mailing AddressPo Box 781076Detroit, MI 48278-1076 · (317) 528-4800 · Fax (219) 924-2502
Phone(219) 852-1524
Fax(219) 933-2288
Sole ProprietorNo
Medical School CMSOtherGraduated 2006
Enumeration DateAugust 21, 2010
Last NPPES UpdateOctober 21, 20269 updates tracked since enumeration
NPPES CertifiedOctober 21, 2026
✔ NPI 1184930604 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in IN · 01075458A✔ Licensed in IL · 036124446✔ Licensed in OR · MD152202
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License 01075458A (IN)
24 JOLIET ST, Dyer, IN 46311
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Other Names 1

Former Name (1)Mohamad Hazem Sahlol

Secondary Practice Locations 3

Location 11601 SE Court AvePendleton, OR 97801-3217 · Phone (541) 276-5121
Location 29509 Georgia StCrown Point, IN 46307-6518 · Phone (219) 472-2200 · Fax (219) 472-2147
Location 311109 Parkview Plaza DrFort Wayne, IN 46845-1701 · Phone (260) 266-2020 · Fax (260) 266-2009

Other Identifiers 1

Medicaid201292580IN

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include 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

Mark Hazem Sahlol 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 ID3274721428
PECOS Enrollment IDI20150616002660
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 Mark Sahlol reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hs Medical Care Inc
29 mi
Internal Medicine
5603 CHILDS AVE
Hinsdale, IL 60521
  • Reassigned Medicare billing, Indiana enrollment
  • 3 clinicians in this Medicare group
NPI 1023961463 (708) 969-9788
Elmhurst Memorial Healthcare
31 mi
Multi-Specialty
1100 LAKE ST, #230
Oak Park, IL 60302
  • Reassigned Medicare billing, Illinois enrollment
  • 240 clinicians in this Medicare group
NPI 1760692362 (630) 993-5676
Franciscan Physician Network
69 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
Parkview Health System,inc
114 mi
Family Medicine
2003 STULTS RD STE 100
Huntington, IN 46750
  • Reassigned Medicare billing, Indiana enrollment
  • 1,752 clinicians in this Medicare group
NPI 1467779124 (260) 356-5424

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 9

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.

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.
448 services190 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
211 services109 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
133 services126 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
91 services89 patients
Advance care planning, first 30 minutes 99497
Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.
42 services42 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.
34 services33 patients

Hospital Affiliations CMS Care Compare 5

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

Methodist Hospitals Inc

Acute Care Hospitals · Gary, IN
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150002
Location600 Grant StGary, IN 46402 · Lake County
Emergency services Birthing friendly

Indiana University Health

Acute Care Hospitals · Indianapolis, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150056
Location1701 N Senate BlvdIndianapolis, IN 46202 · Marion County
Emergency services Birthing friendly

Franciscan Health Dyer

Acute Care Hospitals · Dyer, IN
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number150090
Location24 Joliet StDyer, IN 46311 · Lake County
Emergency services Birthing friendly

Franciscan Health Crown Point

Acute Care Hospitals · Crown Point, IN
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number150126
Location12750 Saint Francis DriveCrown Point, IN 46307 · Lake County
Emergency services Birthing friendly

Franciscan Health Munster

Acute Care Hospitals · Munster, IN
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150165
Location701 Superior AveMunster, IN 46321 · Lake County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 46311 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
$122.49 typical visit price
range $53.07 – $161.76
Typical copayment $30.62 (range $13.26 – $40.44)
Most-billed visit code 99204
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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
3 suppliers22 claims22 services$68.65 avg. paid by Medicare
Portable gaseous oxygen system, rental; home compressor used to fill portable oxygen cylinders; includes portable containers, regulator, flowmeter, humidifier, cannula or mask, and tubing K0738
DME-Oxygen and Supplies · category DC000N
1 supplier11 claims11 services$32.32 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

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

FRED ANTHONY LEPORE JR.
Emergency Medicine
24 JOLIET ST
DYER, IN 46311
Lake County (708) 895-9385
FRANCISCAN PHYSICIANS HOSPITAL, LLC
Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
24 JOLIET ST, SUITE 101
DYER, IN 46311
Lake County (219) 864-2059
GAIL LYNN NORTON-HALE LMFT,LCSW
Social Worker (Clinical)
24 JOLIET ST
DYER, IN 46311
Lake County (219) 322-5747
DR. BRIAN P JULA PSYD
Psychologist (Clinical)
24 JOLIET ST
DYER, IN 46311
Lake County (219) 322-5747
JEANNIE BORAM UR MD
Hospitalist
24 JOLIET ST
DYER, IN 46311
Lake County (219) 852-1524
CHRISTOPHER FRANCIS SHAHZAAD M.D.
Psychiatry & Neurology (Psychiatry)
24 JOLIET ST
DYER, IN 46311
Lake County (219) 322-5747
ESHWAR NAGRAJ MURTHY
Hospitalist
24 JOLIET ST
DYER, IN 46311
Lake County (219) 852-1524
SCOTT T FAIRHURST NP
Nurse Practitioner (Family)
24 JOLIET ST
DYER, IN 46311
Lake County (219) 852-1524

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 Mark Sahlol's NPI number?

The NPI number for Mark Sahlol is 1184930604. It was assigned to this individual provider in the NPPES registry on August 21, 2010. The provider is also known as Mohamad Hazem Sahlol.

Where is Mark Sahlol located?

Mark Sahlol practices at 24 Joliet St, Dyer, IN 46311. The listed phone number is (219) 852-1524.

What is Mark Sahlol's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Mark Sahlol enrolled in Medicare?

Yes. Mark Sahlol 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 Mark Sahlol's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Sahlol reassigns Medicare benefits to 4 organizations: Hs Medical Care Inc (Hinsdale, IL), Elmhurst Memorial Healthcare (Oak Park, IL), Franciscan Physician Network (Mishawaka, IN) and Parkview Health System,inc (Huntington, IN). 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 Mark Sahlol's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Sahlol accept?

Health plans from CareSource list Mark Sahlol 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 Mark Sahlol affiliated with any hospitals?

According to CMS data, Mark Sahlol is affiliated with Methodist Hospitals Inc, Indiana University Health, Franciscan Health Dyer, Franciscan Health Crown Point and Franciscan Health Munster.

When was this NPI record last updated?

The NPPES record for Mark Sahlol was last updated on October 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 days 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.