DR. AHMAD MOHAMED HASSAN MD
NPI 1033572904
Internal Medicine - Gastroenterology in Libertyville, IL

Q: What is Ahmad Hassan's NPI number?

The NPI number for Ahmad Hassan is 1033572904. It was assigned to this individual provider in the NPPES registry on March 30, 2016.

Q: What is Ahmad Hassan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Ahmad Hassan was last updated on October 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.

Active since March 30, 2016PECOS EnrolledAccepts Medicare Assignment

99.5/100

CMS Quality Rating

755 S MILWAUKEE AVE STE 225, LIBERTYVILLE, IL 60048(847) 573-2845(847) 573-2846 Get Directions Write a Review

NPPES record last updated: October 14, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Jul 17, 2022, Mar 30, 2016 (2 updates tracked since 2016).

On this page

About Dr. Ahmad Mohamed Hassan Md NPPES

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

DR. AHMAD MOHAMED HASSAN MD (NPI 1033572904) is an individual gastroenterology provider in Libertyville, Illinois, licensed in Illinois (036147506) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS, is affiliated with Advocate Illinois Masonic Medical Center, and maintains a secondary practice location in Chicago.

NPPES Registry Identity

NPI1033572904

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. AHMAD MOHAMED HASSANCredential: MD

Location Address755 S MILWAUKEE AVE STE 225Libertyville, IL 60048-3266

Mailing Address29373 Network PlChicago, IL 60673-1293

Phone(847) 573-2845

Fax(847) 573-2846

Sole ProprietorYes

Medical School CMSUniversity Of Illinois College Of Med (chi/peor/rock/chm-urb)Graduated 2016

Enumeration DateMarch 30, 2016

Last NPPES UpdateOctober 14, 20252 updates tracked since enumeration

NPPES CertifiedOctober 14, 2025

✔ NPI 1033572904 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in IL · 036147506

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

755 S MILWAUKEE AVE STE 225, Libertyville, IL 60048

Open in Google Maps ↗

Secondary Practice Location 1

Location 11740 W Taylor StChicago, IL 60612-7232 · Phone (866) 600-2273

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Oscar Health.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

Dr. Ahmad Mohamed Hassan 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 ID5496042145

PECOS Enrollment IDI20221114002427

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

Medicare enrollment records show Ahmad Hassan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Lutheran General Hospital

18 mi

Cardiovascular Disease

1775 DEMPSTER ST
Park Ridge, IL 60068

Reassigned Medicare billing, Illinois enrollment
Medicare enrollment name: Advocate Health And Hospitals Corporation
4,870 clinicians in this Medicare group

NPI 1801809306 (847) 723-2210

The Board Of Trustees Of The University Of Illinois

28 mi

Primary Care

3656 N HALSTED ST
Chicago, IL 60613

Reassigned Medicare billing, Illinois enrollment
2,127 clinicians in this Medicare group

NPI 1588815401 (734) 726-4697

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 19

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.

169 services106 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.

79 services75 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.

72 services67 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.

70 services36 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

54 services52 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

48 services32 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

43 services42 patients

Review by radiologist of image from tube placement into bile duct using an endoscope 74328

This procedure involves a specialist, called a radiologist, examining an image taken during a tube placement into your bile duct. The tube is inserted with the help of a tool called an endoscope. This allows the doctor to check for any issues or abnormalities in your bile duct.

29 services26 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

22 services20 patients

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.

15 services14 patients

Incision of pancreatic outlet using a flexible endoscope 43262

This procedure involves a small cut in the outlet of the pancreas using a flexible tube with a camera, called an endoscope. It helps doctors diagnose and treat conditions affecting the pancreas, enhancing patient comfort and recovery.

14 services14 patients

Removal of stone or debris from bile or pancreatic duct using a flexible endoscope 43264

This procedure, called an endoscopic retrograde cholangiopancreatography (ERCP), involves using a flexible tube with a camera (endoscope) to locate and remove stones or debris from your bile or pancreatic duct. It's a non-surgical method to clear the ducts, enhancing your digestive health.

14 services14 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

14 services14 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.

14 services14 patients

Ultrasound guided needle aspiration or biopsy of esophagus using a flexible endoscope 43238

An ultrasound guided needle aspiration or biopsy of the esophagus involves using a flexible tube with a camera (endoscope) to view your esophagus. An ultrasound device on the endoscope helps to guide a needle to take a small tissue sample for testing. This is a safe, minimally invasive procedure.

13 services13 patients

Insertion of stent into pancreatic or bile duct using a flexible endoscope 43274

This procedure involves the placement of a tiny tube, known as a stent, into your pancreatic or bile duct. A flexible endoscope, a long, thin instrument with a light and camera, is used. It aids in relieving blockages and improving flow in these ducts.

13 services11 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

13 services13 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

12 services12 patients

Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope through mouth 43237

This procedure involves a flexible tube with a camera and ultrasound device, inserted through the mouth to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like inflammation, tumors, or other abnormalities.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

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

Advocate Illinois Masonic Medical Center

Acute Care Hospitals · Chicago, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140182

Location836 West Wellington AvenueChicago, IL 60657 · Cook County

Emergency services Birthing friendly

Advocate Condell Medical Center

Acute Care Hospitals · Libertyville, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140202

Location801 S Milwaukee AveLibertyville, IL 60048 · Lake County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60048 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

$137.43 typical visit price

range $59.81 – $181.38

Typical copayment $34.35 (range $14.95 – $45.34)

Most-billed visit code 99204

Established Patient

$105.07 typical visit price

range $19.15 – $147.12

Typical copayment $26.26 (range $4.78 – $36.78)

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.

99.5/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

86.15

Promoting Interoperability

100

Improvement Activities

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 Ahmad Hassan's NPI number?

The NPI number for Ahmad Hassan is 1033572904. It was assigned to this individual provider in the NPPES registry on March 30, 2016.

Where is Ahmad Hassan located?

Ahmad Hassan practices at 755 S Milwaukee Ave Ste 225, Libertyville, IL 60048. The listed phone number is (847) 573-2845.

What is Ahmad Hassan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Ahmad Hassan enrolled in Medicare?

Yes. Ahmad Hassan 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 Ahmad Hassan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ahmad Hassan reassigns Medicare benefits to 2 organizations: Lutheran General Hospital (Park Ridge, IL) and The Board Of Trustees Of The University Of Illinois (Chicago, 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 Ahmad Hassan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ahmad Hassan accept?

Health plans from Ambetter Health and Oscar Health list Ahmad Hassan 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 Ahmad Hassan affiliated with any hospitals?

According to CMS data, Ahmad Hassan is affiliated with Advocate Illinois Masonic Medical Center and Advocate Condell Medical Center.

When was this NPI record last updated?

The NPPES record for Ahmad Hassan was last updated on October 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.