Active NPI 1831101955 Individual Practitioner Male Practitioner

Dr. William J O'brien , MD

Surgery • Aurora, IL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. William O'Brien, MD is a certified Surgery practicing in Aurora, IL. With approximately 37 years of clinical experience since graduating from University Of Wisconsin School Of Medicine in 1989, Dr. O'Brien delivers high-quality medical care to the local community at 1221 N HIGHLAND AVE.

Dr. O'Brien is affiliated with Advocate Health And Hospitals Corporation and accepts Medicare assignment.

Frequently performed procedures and clinical services include ultrasound of both sides of head and neck blood flow, new patient outpatient office visit, ultrasound study of arm or leg veins with compression and maneuvers. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1221 N Highland Ave

Aurora, IL 605061404

Telephone 6308598700

Associated Practice Facility / Clinic

🏢 Dreyer Ambulatory Surgery Center, Llc Facility NPI 1396896684

Medicare Profile & Education

Medical School

University Of Wisconsin School Of Medicine

Graduation Year

1989

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Aurora, IL

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

37 Yrs +10.0 yrs vs City Avg

City Avg: 27.0 Yrs

State Avg: 27.3 Yrs

Regional Practice Density

16 Specialists

Practicing in Aurora, IL (1624 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

76.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. O'brien (37 Years) 37 Yrs

Aurora Specialty Average (27.0 Years) 27.0 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
93880 Ultrasound of both sides of head and neck blood flow	201	201	$724.00	$194.85
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	101	101	$249.00	$115.25
93970 Ultrasound study of arm or leg veins with compression and maneuvers	86	86	$627.00	$189.21
99213 Established patient office or other outpatient visit, typically 15 minutes	61	52	$198.00	$93.35
93925 Ultrasound of leg arteries or artery grafts	51	49	$898.00	$247.93
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	34	31	$788.00	$290.41
12031 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.5 cm or less	32	32	$613.00	$251.04
11602 Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm	26	24	$623.00	$131.38
11603 Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm	25	24	$708.00	$178.49
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	18	18	$370.00	$172.35
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	16	16	$90.00	$14.83
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	16	16	$3519.00	$278.86
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	16	15	$124.00	$55.62
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	12	12	$67.00	$23.89
93971 Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers	11	11	$382.00	$122.34

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93880 Ultrasound of both sides of head and neck blood flow	230	230	$724.00	$200.97
93970 Ultrasound study of arm or leg veins with compression and maneuvers	98	94	$627.00	$199.62
93925 Ultrasound of leg arteries or artery grafts	63	63	$898.00	$249.91
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	56	32	$118.00	$56.42
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	50	50	$237.00	$117.49
99213 Established patient office or other outpatient visit, typically 15 minutes	36	29	$178.00	$82.27
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	31	27	$788.00	$269.96
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	28	28	$352.00	$173.53
11603 Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm	26	19	$708.00	$181.83
11602 Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm	22	16	$623.00	$137.43
12031 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.5 cm or less	18	17	$613.00	$240.58
99202 New patient office or other outpatient visit, typically 20 minutes	17	17	$159.00	$75.41
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	17	17	$259.00	$132.61
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	15	13	$63.00	$24.07
93971 Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers	13	13	$382.00	$126.40

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93880 Ultrasound of both sides of head and neck blood flow	234	232	$724.00	$207.33
93970 Ultrasound study of arm or leg veins with compression and maneuvers	81	81	$627.00	$204.81
93925 Ultrasound of leg arteries or artery grafts	64	63	$898.00	$265.10
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	54	54	$237.00	$115.59
99213 Established patient office or other outpatient visit, typically 15 minutes	48	39	$161.00	$89.57
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	43	21	$168.00	$66.80
99202 New patient office or other outpatient visit, typically 20 minutes	36	36	$159.00	$77.33
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	28	21	$112.00	$60.20
12031 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.5 cm or less	25	24	$613.00	$223.78
11603 Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm	22	19	$708.00	$218.27
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	19	19	$90.00	$19.48
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	19	19	$352.00	$177.14
93880 Ultrasound of both sides of head and neck blood flow	18	18	$103.00	$41.33
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	18	18	$3519.00	$349.30
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	17	16	$238.88	$126.72
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	16	15	$788.00	$287.40
11602 Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm	14	12	$623.00	$150.39
93971 Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers	14	14	$382.00	$123.66
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	12	12	$63.00	$24.50

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93880 Ultrasound of both sides of head and neck blood flow	253	249	$699.45	$209.51
93925 Ultrasound of leg arteries or artery grafts	106	101	$883.55	$268.85
93970 Ultrasound study of arm or leg veins with compression and maneuvers	97	97	$616.63	$208.77
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	76	33	$168.00	$75.16
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	69	69	$236.00	$119.99
99213 Established patient office or other outpatient visit, typically 15 minutes	41	41	$153.00	$97.20
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	40	30	$107.00	$59.81
99202 New patient office or other outpatient visit, typically 20 minutes	38	38	$159.00	$76.07
12031 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.5 cm or less	36	36	$613.00	$244.53
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	31	31	$341.00	$178.93
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	31	31	$300.00	$142.66
93880 Ultrasound of both sides of head and neck blood flow	26	26	$103.00	$40.87
99231 Follow-up hospital inpatient care per day, typically 15 minutes	17	11	$121.00	$40.05
11602 Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm	17	17	$623.00	$142.32
11603 Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm	16	16	$708.00	$248.23
47562 Removal of gallbladder using an endoscope	15	15	$3837.00	$728.12
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	15	15	$90.00	$19.88
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	15	15	$3519.00	$365.07
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	12	12	$788.00	$251.12
99221 Initial hospital inpatient care per day, typically 30 minutes	12	12	$231.00	$106.80
49505 Repair of groin hernia (5 years or older)	12	12	$2013.00	$563.20
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	11	11	$238.00	$128.62

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93880 Ultrasound of both sides of head and neck blood flow	260	260	$724.00	$209.87
93970 Ultrasound study of arm or leg veins with compression and maneuvers	96	96	$627.00	$207.43
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	90	90	$225.00	$114.86
93925 Ultrasound of leg arteries or artery grafts	81	79	$898.00	$266.18
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	59	22	$102.00	$48.40
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	49	26	$168.00	$76.46
99231 Follow-up hospital inpatient care per day, typically 15 minutes	33	20	$121.00	$41.93
99213 Established patient office or other outpatient visit, typically 15 minutes	32	30	$146.00	$80.03
93880 Ultrasound of both sides of head and neck blood flow	28	27	$103.00	$41.28
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	27	26	$300.00	$147.05
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	22	16	$788.00	$248.59
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	18	18	$341.00	$168.89
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	16	16	$224.00	$99.10
12031 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.5 cm or less	14	14	$613.00	$224.82
93926 Ultrasound of one leg arteries or artery grafts	13	12	$574.00	$144.67
11603 Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm	13	11	$708.00	$217.20

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93880 Ultrasound of both sides of head and neck blood flow	283	280	$724.00	$213.88
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	104	104	$225.00	$111.49
93970 Ultrasound study of arm or leg veins with compression and maneuvers	99	99	$627.00	$205.56
93925 Ultrasound of leg arteries or artery grafts	89	88	$898.00	$271.34
93880 Ultrasound of both sides of head and neck blood flow	48	47	$103.00	$43.00
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	40	21	$168.00	$76.89
99213 Established patient office or other outpatient visit, typically 15 minutes	38	36	$146.00	$77.80
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	32	17	$102.00	$46.61
12031 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.5 cm or less	32	32	$613.00	$174.25
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	26	25	$223.15	$114.91
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	25	23	$788.00	$269.75
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	22	22	$297.00	$145.17
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	22	22	$341.00	$174.51
11603 Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm	20	20	$708.00	$230.71
99221 Initial hospital inpatient care per day, typically 30 minutes	18	16	$231.00	$108.23
99231 Follow-up hospital inpatient care per day, typically 15 minutes	18	15	$121.00	$41.73
11602 Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm	17	17	$623.00	$245.04
93926 Ultrasound of one leg arteries or artery grafts	16	16	$574.00	$144.10
47562 Removal of gallbladder using an endoscope	14	14	$3960.33	$747.10
93971 Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers	13	13	$382.00	$129.08

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93880 Ultrasound of both sides of head and neck blood flow	243	240	$696.35	$210.61
93925 Ultrasound of leg arteries or artery grafts	87	84	$859.46	$275.90
93970 Ultrasound study of arm or leg veins with compression and maneuvers	85	85	$678.74	$206.76
93880 Ultrasound of both sides of head and neck blood flow	64	62	$92.91	$42.15
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	64	32	$159.56	$76.53
99213 Established patient office or other outpatient visit, typically 15 minutes	58	54	$138.03	$76.68
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	51	51	$218.00	$114.42
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	42	42	$287.48	$144.10
93971 Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers	42	34	$518.71	$128.67
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	40	24	$90.13	$46.31
99201 New patient office or other outpatient visit, typically 10 minutes	27	27	$95.89	$47.26
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	26	23	$761.69	$246.93
11603 Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm	21	17	$678.86	$177.31
99202 New patient office or other outpatient visit, typically 20 minutes	19	19	$150.05	$76.02
49505 Repair of groin hernia (5 years or older)	16	16	$1848.63	$563.42
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	16	16	$206.75	$112.98
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	16	15	$3519.00	$373.80
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	16	16	$64.56	$19.01
93926 Ultrasound of one leg arteries or artery grafts	15	14	$553.47	$145.15
99231 Follow-up hospital inpatient care per day, typically 15 minutes	14	12	$108.00	$41.31
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	14	14	$326.14	$173.68
11602 Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm	13	12	$613.77	$235.92
12031 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.5 cm or less	11	11	$596.64	$197.22

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93880 Ultrasound of both sides of head and neck blood flow	243	243	$689.00	$210.18
93970 Ultrasound study of arm or leg veins with compression and maneuvers	111	109	$704.00	$208.46
93925 Ultrasound of leg arteries or artery grafts	103	98	$855.00	$269.08
93971 Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers	84	66	$580.00	$125.87
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	66	66	$204.00	$113.85
93880 Ultrasound of both sides of head and neck blood flow	57	56	$86.00	$42.58
99213 Established patient office or other outpatient visit, typically 15 minutes	55	52	$124.00	$76.33
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	39	22	$148.00	$75.58
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	38	29	$83.00	$45.93
99201 New patient office or other outpatient visit, typically 10 minutes	32	32	$87.00	$46.54
49505 Repair of groin hernia (5 years or older)	20	20	$1881.25	$598.63
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	19	19	$272.00	$144.18
11603 Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm	16	14	$674.00	$199.76
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	16	16	$193.00	$112.48
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$315.00	$171.14
11402 Removal of noncancer skin growth of body, arms, or legs, 1.1-2.0 cm	15	15	$391.00	$103.78
99202 New patient office or other outpatient visit, typically 20 minutes	14	14	$141.00	$78.71
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	14	13	$750.00	$243.30
12041 Intermediate repair of wound of neck, hands, feet, or genitals, 2.5 cm or less	13	13	$611.00	$224.26
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	13	13	$53.00	$20.10
49568 Placement of mesh to repair incisional or abdominal hernia	13	13	$814.00	$303.32
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	13	13	$3519.00	$362.57
12042 Intermediate repair of wound of neck, hands, feet, or genitals, 2.6-7.5 cm	11	11	$711.00	$225.20

Medical Specialties & State Licenses

CMS Verified: 2021-11-18

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License IL 036-092894

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.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

036092894 (IL)

Commercial Insurance / Payer ID Bluecross Blueshield

04515143 (IL)

Hospital & Practice Group Affiliations

Advocate Health And Hospitals Corporation

1221 N Highland Ave, Aurora, IL 605061404

Phone: 6308596800

Practice Associates & Co-Workers

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

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Physical Therapist

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Career & Practice History Timeline

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

11 Historical Events

✅

NPI Profile Active February 23, 2017

NPI status registered as active in NPPES database

📍

Updated Business Mailing Address February 23, 2017

Registered at 2357 SEQUOIA DR, AURORA, IL 605066222 (Tel: 6308596800)

📍

Updated Practice Location February 23, 2017

Registered at 1221 N HIGHLAND AVE, AURORA, IL 605061404 (Tel: 6308598700)

👤

Provider Name / Credentials Updated February 23, 2017

Recorded as WILLIAM O'BRIEN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) February 23, 2017

Surgery (License #036-092894 in IL)

✅

NPI Profile Active January 23, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location January 23, 2013

Registered at 1221 N HIGHLAND AVE, AURORA, IL 605061404 (Tel: 6308598700)

📍

Updated Business Mailing Address January 23, 2013

Registered at 1870 W GALENA BLVD, AURORA, IL 605064356 (Tel: 6308596700)

👤

Provider Name / Credentials Updated January 23, 2013

Recorded as WILLIAM O'BRIEN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 23, 2013

Surgery (License #036-092894 in IL)

🟢

Initial NPI Registration & Enumeration August 13, 2006

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: 1831101955

Entity Type:

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

Enumeration Date: August 13, 2006

Last Update: November 18, 2021

Sole Proprietor: No

Update or Correct Profile

Mailing Address

2357 Sequoia Dr

Aurora, IL 605066222

Phone: 6308596800

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.