Active NPI 1396039442 Individual Practitioner Male Practitioner

Dr. William Joseph Ares , MD

Neurological Surgery • Evanston, IL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. William Ares, MD is a certified Neurological Surgery practicing in Evanston, IL. With approximately 14 years of clinical experience since completing medical education in 2012, Dr. Ares delivers high-quality medical care to the local community at 1000 CENTRAL ST STE 880.

Dr. Ares is affiliated with Endeavor Health Medical Group and accepts Medicare assignment.

Frequently performed procedures and clinical services include new patient outpatient office visit, established patient outpatient office visit, insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1000 Central St Ste 880

Evanston, IL 60201

Telephone 8475701440

Fax 8475701442

Medicare Profile & Education

Medical School

Other

Graduation Year

2012

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Neurological Surgery in Evanston, IL

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

14 Yrs -13.3 yrs vs City Avg

City Avg: 27.3 Yrs

State Avg: 26.9 Yrs

Regional Practice Density

6 Specialists

Practicing in Evanston, IL (397 Statewide)

Telehealth Adoption Rate

16.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

76.7% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Ares (14 Years) 14 Yrs

Evanston Specialty Average (27.3 Years) 27.3 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
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	71	71	$380.00	$142.02
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	52	49	$226.40	$102.37
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	45	39	$1905.78	$364.57
75898 Imaging of blood vessel	39	29	$312.00	$103.16
75894 Radiological supervision and interpretation of obstruction of blood vessel via catheter	38	29	$172.00	$80.49
61624 Occlusion of central nervous system or spinal cord artery	36	27	$6680.00	$1272.41
99213 Established patient office or other outpatient visit, typically 15 minutes	32	31	$154.91	$69.53
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	31	31	$500.00	$194.13
36227 Insertion of tube into external neck artery for diagnosis or treatment with review by radiologist	31	29	$604.65	$166.63
36226 Insertion of tube into brain artery for diagnosis or treatment with review by radiologist	26	21	$1534.62	$240.44
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	21	21	$380.00	$139.69
22853 Insertion of cage or mesh device to spine bone and disc space during spine fusion	19	11	$978.00	$305.57
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	17	16	$238.71	$105.28
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	17	16	$370.00	$152.33
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	16	16	$538.00	$182.60
61645 Removal of blood clot and injection to dissolve blood clot from head artery using fluoroscopic guidance, accessed through skin	14	13	$2816.00	$989.85
36223 Insertion of tube into intracranial artery for diagnosis or treatment with review by radiologist	14	13	$1762.50	$399.32
99291 Critical care, first 30-74 minutes	13	13	$616.00	$226.75
22551 Fusion of upper spine bone with removal of disc and release of spinal cord or nerve, 1 disc	12	12	$6205.00	$2015.95
22845 Placement of stabilizing device to front, 2-3 spine bone segments	12	12	$8500.00	$861.61

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	70	70	$380.00	$143.23
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	63	59	$224.00	$103.81
99213 Established patient office or other outpatient visit, typically 15 minutes	45	38	$153.18	$70.46
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	35	34	$1722.86	$311.59
75898 Imaging of blood vessel	34	29	$312.00	$103.18
75894 Radiological supervision and interpretation of obstruction of blood vessel via catheter	33	29	$172.00	$80.67
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	31	31	$500.00	$194.46
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	31	31	$392.10	$139.99
61624 Occlusion of central nervous system or spinal cord artery	31	27	$6680.00	$1294.34
36227 Insertion of tube into external neck artery for diagnosis or treatment with review by radiologist	27	27	$504.89	$153.82
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	21	21	$229.95	$103.86
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	19	19	$370.00	$152.33
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	19	19	$532.21	$185.20
22853 Insertion of cage or mesh device to spine bone and disc space during spine fusion	19	12	$978.00	$306.59
99448 Telephone or internet assessment with verbal and written report by consulting physician, 21-30 minutes	16	16	$121.00	$57.95
99291 Critical care, first 30-74 minutes	14	13	$616.00	$230.74

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	76	76	$386.30	$146.84
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	66	61	$197.32	$103.91
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	31	31	$498.19	$199.05
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	30	30	$388.37	$140.72
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	29	29	$559.55	$211.84
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	26	26	$1855.38	$422.64
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	26	26	$305.92	$156.61
99291 Critical care, first 30-74 minutes	21	21	$616.00	$235.92
36226 Insertion of tube into brain artery for diagnosis or treatment with review by radiologist	19	17	$1890.00	$301.61
99213 Established patient office or other outpatient visit, typically 15 minutes	19	19	$132.53	$72.07
75898 Imaging of blood vessel	17	16	$312.00	$102.19
99448 Telephone or internet assessment with verbal and written report by consulting physician, 21-30 minutes	17	17	$121.00	$58.47
75894 Radiological supervision and interpretation of obstruction of blood vessel via catheter	16	16	$2622.88	$80.63
36223 Insertion of tube into intracranial artery for diagnosis or treatment with review by radiologist	16	15	$1762.50	$364.58
61645 Removal of blood clot and injection to dissolve blood clot from head artery using fluoroscopic guidance, accessed through skin	16	16	$2816.00	$983.71
36225 Insertion of tube into chest artery for diagnosis or treatment with review by radiologist	13	13	$1451.08	$230.81
36227 Insertion of tube into external neck artery for diagnosis or treatment with review by radiologist	13	13	$589.85	$167.32
61624 Occlusion of central nervous system or spinal cord artery	12	12	$13278.17	$1369.41

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	76	72	$186.13	$106.74
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	75	75	$390.09	$145.51
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	47	45	$563.00	$212.73
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	40	40	$386.00	$144.47
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	34	14	$289.00	$109.57
99448 Telephone or internet assessment with verbal and written report by consulting physician, 21-30 minutes	30	30	$121.00	$57.27
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	27	26	$183.00	$105.13
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	26	25	$2431.25	$423.87
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	25	25	$499.16	$199.81
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	24	24	$272.00	$157.29
75898 Imaging of blood vessel	21	17	$312.00	$100.17
75894 Radiological supervision and interpretation of obstruction of blood vessel via catheter	19	18	$2834.74	$79.52
99213 Established patient office or other outpatient visit, typically 15 minutes	17	17	$117.00	$72.42
36227 Insertion of tube into external neck artery for diagnosis or treatment with review by radiologist	15	14	$596.40	$165.49
99291 Critical care, first 30-74 minutes	15	14	$591.67	$237.24
61624 Occlusion of central nervous system or spinal cord artery	15	14	$13327.13	$1310.40
36226 Insertion of tube into brain artery for diagnosis or treatment with review by radiologist	14	13	$1900.00	$291.61
61645 Removal of blood clot and injection to dissolve blood clot from head artery using fluoroscopic guidance, accessed through skin	12	12	$2677.18	$976.94

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	75	75	$380.19	$141.19
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	73	60	$196.04	$85.20
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	65	61	$562.42	$217.80
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	36	23	$288.17	$111.61
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	30	19	$217.00	$77.53
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	28	28	$372.61	$138.55
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	20	20	$266.80	$120.38
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	20	18	$194.90	$84.06
99291 Critical care, first 30-74 minutes	16	15	$597.81	$240.99
36223 Insertion of tube into intracranial artery for diagnosis or treatment with review by radiologist	14	14	$2087.68	$349.33
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	13	12	$2800.96	$496.68
99448 Telephone or internet assessment with verbal and written report by consulting physician, 21-30 minutes	13	13	$121.00	$59.10
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	12	12	$493.92	$183.58
36225 Insertion of tube into chest artery for diagnosis or treatment with review by radiologist	12	12	$1965.00	$321.95

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	73	73	$361.00	$137.90
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	39	19	$217.00	$77.05
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	30	17	$287.00	$110.02
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	30	29	$556.33	$214.30
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	21	20	$183.00	$83.18
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	20	20	$361.00	$135.96

Medical Specialties & State Licenses

Neurological Surgery Primary Specialty

NUCC Taxonomy Code: 207T00000X

State License IL 036148890

A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.

Hospital & Practice Group Affiliations

Endeavor Health Medical Group

2650 Ridge Ave, Evanston, IL 602011700

Endeavor Health Medical Group

2100 Pfingsten Rd, Glenview, IL 600261301

Endeavor Health Medical Group

9600 Gross Point Rd, Skokie, IL 600761214

Endeavor Health Medical Group

920 Milwaukee Ave, Lincolnshire, IL 600693839

Phone: 8478667846

Endeavor Health Medical Group

5115 N Francisco, Chicago, IL 606253611

Phone: 7739895571

Endeavor Health Medical Group

1300 Oak Ave, Evanston, IL 602014205

Phone: 8478691300

Endeavor Health Medical Group

1000 Central St, Evanston, IL 602011780

Endeavor Health Medical Group

5115 N Francisco Ave, Chicago, IL 606253611

Phone: 8475701440

Practice Associates & Co-Workers

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

18 Associated Practitioners

Meredith Clark

Physician Assistant - Surgical

NPI 1023609278

Dr. Shakeel Chowdhry , MD

Neurological Surgery

NPI 1083811418

Doctor of Medicine (M.D.)

Morgan Berland , PA-C

Physician Assistant - Surgical

NPI 1164158812

Physician Assistant (Certified)

Christine Compisi , PA-C

Physician Assistant - Surgical

NPI 1164750659

Physician Assistant (Certified)

Dr. Ricky Wong , MD

Neurological Surgery

NPI 1184862336

Doctor of Medicine (M.D.)

Dr. Julian Bailes , MD

Neurological Surgery

NPI 1225138001

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

10 Historical Events

📍

Updated Practice Location July 08, 2019

Registered at 1000 CENTRAL ST STE 880, EVANSTON, IL 60201 (Tel: 8475701440)

📍

Updated Business Mailing Address July 08, 2019

Registered at 1000 CENTRAL ST STE 880, EVANSTON, IL 602011780 (Tel: 8475701440)

👤

Provider Name / Credentials Updated July 08, 2019

Recorded as WILLIAM ARES, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2019

Neurological Surgery (License #036148890 in IL)

✅

NPI Profile Active June 11, 2012

NPI status registered as active in NPPES database

📍

Updated Practice Location June 11, 2012

Registered at 200 LOTHROP ST, SUITE B-400, PITTSBURGH, PA 152132536 (Tel: 4126476777)

📍

Updated Business Mailing Address June 11, 2012

Registered at 200 LOTHROP ST, SUITE B-400, PITTSBURGH, PA 152132536 (Tel: 4126476777)

👤

Provider Name / Credentials Updated June 11, 2012

Recorded as WILLIAM ARES

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 11, 2012

Student in an Organized Health Care Education/Training Program (License #MT202024 in PA)

🟢

Initial NPI Registration & Enumeration June 07, 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: 1396039442

Entity Type:

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

Enumeration Date: June 07, 2011

Last Update: July 08, 2019

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

1000 Central St Ste 880

Evanston, IL 602011780

Phone: 8475701440

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.