DR. WILLIS G PARSONS M.D.
NPI 1972578698
Internal Medicine - Gastroenterology in Arlington Heights, IL

Q: What is Willis Parsons's NPI number?

The NPI number for Willis Parsons is 1972578698. It was assigned to this individual provider in the NPPES registry on February 17, 2006.

Q: What is Willis Parsons'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 Willis Parsons was last updated on May 10, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.

Active since February 17, 2006PECOS EnrolledAccepts Medicare Assignment

89.66/100

CMS Quality Rating

880 W CENTRAL RD STE 4500, ARLINGTON HEIGHTS, IL 60005(847) 725-8640 Get Directions Write a Review

NPPES record last updated: May 10, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: May 10, 2021, Mar 3, 2020 (2 updates tracked since 2020).

On this page

About Dr. Willis G Parsons M.d. NPPES

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

DR. WILLIS G PARSONS M.D. (NPI 1972578698) is an individual gastroenterology provider in Arlington Heights, Illinois, licensed in Illinois (036090940) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and is a graduate of Vanderbilt University School Of Medicine (1989).

NPPES Registry Identity

NPI1972578698

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. WILLIS G PARSONSCredential: M.D.

Location Address880 W CENTRAL RD STE 4500Arlington Heights, IL 60005-2388

Mailing Address880 W Central Rd Ste 4500Arlington Heights, IL 60005-2388 · (847) 725-8640 · Fax (847) 394-2777

Phone(847) 725-8640

Sole ProprietorNo

Medical School CMSVanderbilt University School Of MedicineGraduated 1989

Enumeration DateFebruary 17, 2006

Last NPPES UpdateMay 10, 20212 updates tracked since enumeration

NPPES CertifiedMay 10, 2021

✔ NPI 1972578698 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 · 036090940

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.

880 W CENTRAL RD STE 4500, Arlington Heights, IL 60005

Open in Google Maps ↗

Other Identifiers 1

Medicaid036090940IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Willis G Parsons M.d. 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 ID3173513736

PECOS Enrollment IDI20071113000220

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.

Areas of Expertise CMS Part B claims 35

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.

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.

210 services210 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.

158 services94 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.

133 services115 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.

129 services95 patients

Measurement of liver stiffness 91200

Measurement of liver stiffness is a non-invasive procedure that helps assess the health of your liver. It uses sound waves to detect the hardness of the liver tissue, which can indicate conditions like fibrosis or cirrhosis. It's a simple, painless test that provides valuable information about your liver's health.

114 services111 patients

Ultrasound guided needle aspiration or biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43242

This procedure involves using an ultrasound to guide a needle to specific areas in the esophagus, stomach, or upper small bowel. A flexible endoscope is used to reach these areas. The needle collects a small sample for testing.

112 services110 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.

87 services79 patients

Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43259

This procedure involves a flexible tube with a camera, called an endoscope, inserted through your mouth to examine your esophagus, stomach, and upper small bowel. An ultrasound device on the endoscope helps get detailed images. It's safe and helps diagnose various conditions.

82 services80 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.

75 services75 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.

66 services56 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.

62 services58 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.

48 services48 patients

Review by radiologist of image from tube placement into bile and pancreatic duct using an endoscope 74330

This procedure involves a radiologist examining images from a tube placement in your bile and pancreatic duct. An endoscope, a flexible tube with a light and camera, is used to help guide this process. It assists in diagnosing and treating conditions related to these ducts.

41 services37 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.

40 services39 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.

39 services36 patients

Replacement of stent in pancreatic or bile duct using a flexible endoscope 43276

This procedure involves replacing an existing stent in your pancreatic or bile duct. A flexible endoscope, a tube-like device with a light and camera, is used to view and access the area. The old stent is removed and a new one is placed to help keep the duct open.

33 services21 patients

Injection of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43236

This procedure involves a flexible tube, called an endoscope, which is passed through your mouth to examine your esophagus, stomach, and upper small bowel. A special needle is used to inject medication or other substances directly into these areas.

32 services31 patients

Removal of large bowel tissue using a flexible endoscope 45390

This procedure, known as a colonoscopy, involves using a flexible endoscope to examine and potentially remove tissue from the large intestine. The endoscope allows the doctor to view the bowel lining directly and remove any abnormal tissue for further analysis.

32 services30 patients

Removal of stent from pancreatic or bile duct using a flexible endoscope 43275

This procedure involves removing a stent from your pancreatic or bile duct. A flexible endoscope, a thin tube with a light and camera, is used to locate the stent. Once found, it's carefully extracted. This helps maintain proper duct function.

31 services30 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.

31 services30 patients

Review by radiologist of image to guide opening of digestive tract 74360

This procedure involves a radiologist examining an image of your digestive tract. The image helps the radiologist determine the best way to open your digestive tract, if necessary. This is done to diagnose or treat certain conditions. It's a common, safe procedure.

25 services22 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.

23 services22 patients

Removal of tissue lining of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43254

This procedure involves the use of a flexible tube with a light and camera, called an endoscope, to remove tissue from your esophagus, stomach, or upper small bowel. It's typically done to diagnose or treat certain conditions, and is a safe, minimally invasive option.

23 services20 patients

Destruction of polyp or growth of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43270

This procedure involves using a flexible tool called an endoscope to identify and remove abnormal growths or polyps in the esophagus, stomach, or upper small bowel. It's a safe way to prevent these growths from causing health issues.

23 services21 patients

Microscopic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43252

This procedure involves using a thin, flexible instrument called an endoscope to examine the esophagus, stomach, and upper small bowel. The endoscope has a light and camera, allowing a detailed view of these areas to help diagnose various conditions.

22 services22 patients

Destruction of polyp or growth of large bowel using a flexible endoscope 45388

This procedure involves the removal of a polyp or growth in the large bowel. A flexible endoscope, a thin tube with a camera, is inserted through the rectum to visualize and remove the growth. This helps maintain bowel health and prevent complications.

20 services18 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

20 services20 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

17 services17 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.

17 services16 patients

Diagnostic exam of gallbladder and pancreatic, liver, and bile ducts using an endoscope 43260

This procedure, known as an ERCP, involves using a flexible tube with a camera, called an endoscope, to examine your gallbladder, pancreas, liver, and bile ducts. It can detect issues like blockages or diseases. You'll be sedated for comfort.

16 services16 patients

Biopsy of gallbladder, pancreatic, liver, and bile ducts using a flexible endoscope 43261

This procedure involves using a flexible tube, called an endoscope, to examine and take small tissue samples from your gallbladder, pancreas, liver, and bile ducts. These samples can help diagnose various conditions.

15 services15 patients

Injection beneath lining of large bowel using a flexible endoscope 45381

This procedure involves a flexible tube, called an endoscope, being inserted into the large bowel. A small needle is then passed through the tube to inject medication under the bowel lining. This is typically done to treat inflammation or bleeding.

14 services14 patients

Destruction of stone of bile or pancreatic duct using a flexible endoscope 43265

This procedure involves using a flexible endoscope, a thin tube with a light and camera, to locate and destroy stones in the bile or pancreatic duct. The endoscope is inserted through the mouth and guided to the affected area. The stones are then broken down and removed.

13 services12 patients

Diagnostic exam of small bowel (including lower small intestine) using an endoscope 44376

This procedure involves using a thin, flexible tube with a camera, called an endoscope, to examine your small bowel. It helps in identifying issues like inflammation or abnormal growths. It's a safe procedure with minimal discomfort.

12 services11 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

12 services12 patients

Hospital Affiliations CMS Care Compare 3

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

Northshore University Healthsystem - Evanston Hospital

Acute Care Hospitals · Evanston, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140010

Location2650 Ridge AveEvanston, IL 60201 · Cook County

Emergency services Birthing friendly

Morris Hospital & Healthcare Centers

Acute Care Hospitals · Morris, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140101

Location150 W High StMorris, IL 60450 · Grundy County

Emergency services Birthing friendly

Northwest Community Hospital 1

Acute Care Hospitals · Arlington Heights, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140252

Location800 W Central RoadArlington Heights, IL 60005 · Cook County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60005 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

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

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.

89.66/100

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

Scored through an Alternative Payment Model

Quality

79.32

Promoting Interoperability

100

Improvement Activities

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.

Enteral feeding supply kit; gravity fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4036

Other-Enteral and Parenteral · category OB006N

1 supplier12 claims360 services$3.79 avg. paid by Medicare

Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152

Other-Enteral and Parenteral · category OB006N

1 supplier12 claims6,756 services$0.27 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 4

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

EDIE HARDIN

Physician Assistant

880 W CENTRAL RD STE 4500
ARLINGTON HEIGHTS, IL 60005

Cook County (847) 398-2777

MEGAN DORSEY APN-CNP

Nurse Practitioner

880 W CENTRAL RD STE 4500
ARLINGTON HEIGHTS, IL 60005

Cook County (847) 398-2777

PAIGE ANNE EPPERSON PA-C

Physician Assistant

880 W CENTRAL RD STE 4500
ARLINGTON HEIGHTS, IL 60005

Cook County (847) 618-3060

DR. DAVID MARK JANDURA MD

Internal Medicine (Gastroenterology)

880 W CENTRAL RD STE 4500
ARLINGTON HEIGHTS, IL 60005

Cook County (847) 398-2777

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 Willis Parsons's NPI number?

The NPI number for Willis Parsons is 1972578698. It was assigned to this individual provider in the NPPES registry on February 17, 2006.

Where is Willis Parsons located?

Willis Parsons practices at 880 W Central Rd Ste 4500, Arlington Heights, IL 60005. The listed phone number is (847) 725-8640.

What is Willis Parsons's specialty?

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

Is Willis Parsons enrolled in Medicare?

Yes. Willis Parsons 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.

What insurance does Willis Parsons accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Willis Parsons 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 Willis Parsons affiliated with any hospitals?

According to CMS data, Willis Parsons is affiliated with Northshore University Healthsystem - Evanston Hospital, Morris Hospital & Healthcare Centers and Northwest Community Hospital 1.

When was this NPI record last updated?

The NPPES record for Willis Parsons was last updated on May 10, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.