Active NPI 1659663581 Individual Practitioner Female Practitioner

Dr. Gretchen Kathleen Williams , DO

Surgery • Kankakee, IL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Gretchen Williams, DO is a certified Surgery practicing in Kankakee, IL. With approximately 15 years of clinical experience since graduating from At Still University Of Health Sciences, College Of Osteo Med, Kirksville in 2011, Dr. Williams delivers high-quality medical care to the local community at 400 N WALL ST STE B410.

Dr. Williams is affiliated with Riverside Health System and accepts Medicare assignment.

Frequently performed procedures and clinical services include new patient outpatient office visit, initial hospital care with straightforward or low-level medical decision making, if using time, at least, subsequent hospital care with moderate levelof medical decision making, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

400 N Wall St Ste B410

Kankakee, IL 609012940

Telephone 8159332221

Fax 8159333975

Associated Practice Facility / Clinic

🏢 S David Lang Md Limited Facility NPI 1962677450

Medicare Profile & Education

Medical School

At Still University Of Health Sciences, College Of Osteo Med, Kirksville

Graduation Year

2011

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Kankakee, IL

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

15 Yrs -4.0 yrs vs City Avg

City Avg: 19.0 Yrs

State Avg: 27.3 Yrs

Regional Practice Density

12 Specialists

Practicing in Kankakee, IL (1624 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

67.3% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Williams (15 Years) 15 Yrs

Kankakee Specialty Average (19.0 Years) 19.0 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	80	80	$206.00	$105.92
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	72	68	$260.00	$126.60
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	62	36	$150.00	$76.23
99213 Established patient office or other outpatient visit, typically 15 minutes	59	50	$150.00	$86.77
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	35	35	$321.00	$161.15
99231 Follow-up hospital inpatient care per day, typically 15 minutes	29	24	$95.00	$48.08
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	24	23	$85.00	$53.66
38525 Biopsy or removal of lymph nodes of under the arm, open procedure	14	14	$1046.86	$244.30
47562 Removal of gallbladder using an endoscope	11	11	$2474.00	$663.23

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	94	94	$202.00	$110.04
99213 Established patient office or other outpatient visit, typically 15 minutes	56	47	$135.00	$85.39
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	45	43	$257.00	$129.78
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	44	32	$81.00	$54.89
99231 Follow-up hospital inpatient care per day, typically 15 minutes	36	27	$91.00	$49.79
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	35	35	$306.00	$163.63
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	34	20	$134.00	$78.74
99221 Initial hospital inpatient care per day, typically 30 minutes	19	18	$225.00	$83.31
45378 Diagnostic exam of large bowel using a flexible endoscope	14	14	$794.00	$182.91
45380 Biopsy of large bowel using an endoscope	14	14	$925.00	$159.40
47562 Removal of gallbladder using an endoscope	13	13	$2357.00	$675.59
38525 Biopsy or removal of lymph nodes of under the arm, open procedure	12	12	$931.00	$242.94

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	81	81	$202.00	$109.63
99213 Established patient office or other outpatient visit, typically 15 minutes	54	49	$135.00	$89.16
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	50	27	$134.00	$70.67
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	47	47	$306.00	$162.69
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	40	39	$257.00	$134.10
99231 Follow-up hospital inpatient care per day, typically 15 minutes	20	13	$91.00	$38.39
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	17	14	$81.00	$53.16
45378 Diagnostic exam of large bowel using a flexible endoscope	13	13	$794.00	$184.81
19301 Partial removal of breast	12	12	$1389.00	$679.07
47562 Removal of gallbladder using an endoscope	11	11	$2357.00	$631.62

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	109	46	$134.00	$71.84
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	77	72	$257.00	$136.04
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	59	59	$202.00	$111.54
99213 Established patient office or other outpatient visit, typically 15 minutes	47	41	$135.00	$89.44
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	40	40	$306.00	$167.38
19301 Partial removal of breast	17	16	$1470.71	$703.88
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	16	16	$198.00	$128.46
38525 Biopsy or removal of lymph nodes of under the arm, open procedure	15	15	$1117.20	$264.80
47562 Removal of gallbladder using an endoscope	13	13	$2357.00	$676.82
45380 Biopsy of large bowel using an endoscope	12	12	$925.00	$172.42
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	12	12	$1144.00	$257.65

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	68	37	$130.00	$72.36
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	53	53	$178.00	$106.39
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	46	46	$274.00	$164.06
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	40	38	$240.00	$140.08
99213 Established patient office or other outpatient visit, typically 15 minutes	32	29	$119.00	$74.19
99221 Initial hospital inpatient care per day, typically 30 minutes	19	17	$225.00	$103.81

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	101	101	$178.00	$105.67
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	81	43	$130.00	$72.86
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	53	51	$240.00	$137.38
99213 Established patient office or other outpatient visit, typically 15 minutes	39	37	$119.00	$72.63
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	20	20	$274.00	$162.33
99221 Initial hospital inpatient care per day, typically 30 minutes	19	19	$225.00	$102.12
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	19	19	$1144.00	$265.92
99202 New patient office or other outpatient visit, typically 20 minutes	17	17	$122.00	$74.63
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	15	13	$71.00	$43.81
45380 Biopsy of large bowel using an endoscope	15	15	$925.00	$157.79
10060 Simple or single drainage of skin abscess	12	11	$225.00	$116.30
45378 Diagnostic exam of large bowel using a flexible endoscope	11	11	$794.00	$184.35
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	11	11	$176.00	$106.58

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	72	72	$178.00	$105.06
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	59	59	$240.00	$135.59
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	45	25	$130.00	$72.08
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	44	44	$274.00	$160.62
99213 Established patient office or other outpatient visit, typically 15 minutes	43	28	$119.00	$70.65
38525 Biopsy or removal of lymph nodes of under the arm, open procedure	12	12	$924.00	$259.55
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	12	11	$71.00	$42.32
45378 Diagnostic exam of large bowel using a flexible endoscope	12	12	$794.00	$191.26
19301 Partial removal of breast	12	11	$1350.00	$664.27
47562 Removal of gallbladder using an endoscope	11	11	$2357.00	$663.05
38792 Injection of radioactive material for x-ray identification of lymph node	11	11	$433.00	$19.61

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	103	43	$130.00	$88.28
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	60	57	$240.00	$168.53
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	54	54	$274.00	$196.08
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	52	52	$178.00	$129.70
99213 Established patient office or other outpatient visit, typically 15 minutes	34	26	$119.00	$86.58
99202 New patient office or other outpatient visit, typically 20 minutes	14	14	$122.00	$88.35
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	11	11	$1144.00	$326.80

Medical Specialties & State Licenses

CMS Verified: 2021-02-09

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License MI 5101019120

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Hospital & Practice Group Affiliations

Riverside Health System

105 S 1st St, Willmington, IL 604818973

Phone: 8154765210

Riverside Health System

611 Division St, Peotone, IL 604689590

Phone: 7082589058

Riverside Health System

350 N Wall St 4th Floor, Kankakee, IL 609012901

Phone: 81593316714592

Riverside Health System

375 N Wall St, Kankakee, IL 609013484

Phone: 8159363240

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

6 Associated Practitioners

Dr. Dong Kim , MD

Surgery

NPI 1104938984

Doctor of Medicine (M.D.)

Dr. Aline Dang , DO

Surgery

NPI 1316394430

Doctor of Osteopathic Medicine (D.O.)

Steven Groene

Surgery

NPI 1407175318

Dr. Kay Timbers , MD

Surgery

NPI 1528334208

Doctor of Medicine (M.D.)

Dr. Soren Lang , MD

Surgery

NPI 1538263256

Doctor of Medicine (M.D.)

Dr. Vinay Bajaj , MD

Surgery

NPI 1619325446

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

8 Historical Events

📍

Updated Practice Location February 09, 2021

Registered at 400 N WALL ST STE B410, KANKAKEE, IL 609012940 (Tel: 8159332221)

📍

Updated Business Mailing Address February 09, 2021

Registered at 400 N WALL ST STE B410, KANKAKEE, IL 609012940 (Tel: 8159332221)

✅

NPI Profile Active May 11, 2011

NPI status registered as active in NPPES database

📍

Updated Practice Location May 11, 2011

Registered at 28050 GRAND RIVER AVE, FARMINGTON HILLS, MI 483365919 (Tel: 2488882516)

📍

Updated Business Mailing Address May 11, 2011

Registered at 28050 GRAND RIVER AVE, FARMINGTON HILLS, MI 483365919 (Tel: 2488882516)

👤

Provider Name / Credentials Updated May 11, 2011

Recorded as GRETCHEN WILLIAMS, D.O

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 11, 2011

Surgery (License #5101019120 in MI)

🟢

Initial NPI Registration & Enumeration May 11, 2011

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1659663581

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: May 11, 2011

Last Update: February 09, 2021

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

400 N Wall St Ste B410

Kankakee, IL 609012940

Phone: 8159332221

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.