Active NPI 1821085358 Individual Practitioner Male Practitioner

Dr. Mark Toyama , MD

Surgery • Chicago, IL

Professional Overview & Biography Verified Profile Summary

Dr. Mark Toyama, MD is a registered healthcare professional specializing in Surgery in Chicago, IL. Practice services are available at 676 N SAINT CLAIR ST under active NPI credentials.

Frequently performed procedures and clinical services include new patient outpatient office visit, established patient outpatient office visit, repair of groin hernia (5 years or older). Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

676 N Saint Clair St
Suite 1525

Chicago, IL 606112927

Telephone 3122551451

Fax 3122660478

Associated Practice Facility / Clinic

🏢 Orthopedic Associates Of Chicago Facility NPI 1376515866

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Chicago, IL

Active Practitioner

Practitioner Clinical Experience

Active

City Avg: 22.3 Yrs

State Avg: 27.3 Yrs

Regional Practice Density

579 Specialists

Practicing in Chicago, IL (1624 Statewide)

Telehealth Adoption Rate

4.8% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

38.3% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2023)

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	27	27	$207.00	$120.76
99213 Established patient office or other outpatient visit, typically 15 minutes	14	12	$124.00	$96.00
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$309.00	$178.22

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	51	51	$207.00	$122.50
99213 Established patient office or other outpatient visit, typically 15 minutes	40	33	$124.00	$97.07
49505 Repair of groin hernia (5 years or older)	24	24	$2608.33	$589.68
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	21	21	$309.00	$181.63
49650 Repair of groin hernia using an endoscope	13	13	$2761.54	$624.85

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	32	27	$124.00	$98.97
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	31	31	$207.00	$122.47
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	26	12	$249.00	$110.87
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	22	22	$309.00	$183.00

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	27	27	$207.00	$117.29
99213 Established patient office or other outpatient visit, typically 15 minutes	19	17	$124.00	$81.33
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	14	14	$309.00	$179.40

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	56	56	$207.00	$115.31
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	33	15	$249.00	$110.05
99213 Established patient office or other outpatient visit, typically 15 minutes	23	18	$124.00	$78.19
49505 Repair of groin hernia (5 years or older)	17	17	$2623.53	$622.38
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$309.00	$174.82
49650 Repair of groin hernia using an endoscope	11	11	$2800.00	$518.95

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	57	57	$208.25	$112.22
99213 Established patient office or other outpatient visit, typically 15 minutes	27	23	$124.00	$74.91
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	21	21	$312.62	$170.28
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	20	11	$249.00	$107.55
49505 Repair of groin hernia (5 years or older)	19	19	$2600.00	$569.62
55520 Removal of spermatic cord growth	16	16	$2400.00	$276.66

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	54	54	$207.00	$109.97
55520 Removal of spermatic cord growth	25	25	$2496.00	$268.20
49505 Repair of groin hernia (5 years or older)	21	21	$2600.00	$562.00
99213 Established patient office or other outpatient visit, typically 15 minutes	17	16	$124.00	$73.07
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$309.00	$165.94

Medical Specialties & State Licenses

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

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

Commercial Insurance / Payer ID Blue Shield

01621690 (IL)

Practice Associates & Co-Workers

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

6 Associated Practitioners

Dr. Willson Hartz , MD

Surgery

NPI 1225084031

Doctor of Medicine (M.D.)

Dr. Gerald Ujiki , MD

Surgery

NPI 1235126764

Doctor of Medicine (M.D.)

Dr. Melvin Goldstein , MD

Internal Medicine - Gastroenterology

NPI 1376531400

Doctor of Medicine (M.D.)

Dr. Kyle Mueller , MD

Surgery

NPI 1629167903

Doctor of Medicine (M.D.)

Dr. Marshall Sparberg , MD

Internal Medicine - Gastroenterology

NPI 1700852571

Doctor of Medicine (M.D.)

Dr. Steven Stryker , MD

Colon & Rectal Surgery

NPI 1760448096

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location July 08, 2007

Registered at 676 N SAINT CLAIR ST, SUITE 1525, CHICAGO, IL 606112927 (Tel: 3122551451)

📍

Updated Business Mailing Address July 08, 2007

Registered at PO BOX 388320, CHICAGO, IL 606388320 (Tel: 7737678283)

👤

Provider Name / Credentials Updated July 08, 2007

Recorded as MARK TOYAMA, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Surgery

🟢

Initial NPI Registration & Enumeration September 30, 2005

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: 1821085358

Entity Type:

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

Enumeration Date: September 30, 2005

Last Update: July 13, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

Po Box 388320

Chicago, IL 606388320

Phone: 7737678283

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.