Active NPI 1578590899 Individual Practitioner Male Practitioner

Dr. G. Michael Gerard Chun , MD

Specialist • Irvine, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. G. Michael Chun, MD is a certified Specialist practicing in Irvine, CA. With approximately 37 years of clinical experience since graduating from Tulane University School Of Medicine in 1989, Dr. Chun delivers high-quality medical care to the local community at 16200 SAND CANYON AVE.

Dr. Chun is affiliated with United Medical Imaging Healthcare Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include dxa bone density measurement of hip, pelvis, spine, screening mammography, fine needle aspiration of first lesion using ultrasound guidance. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

16200 Sand Canyon Ave
Irh Department Of Radiology

Irvine, CA 926183714

Telephone 9497532365

Fax 9497532368

Associated Practice Facility / Clinic

🏢 Amisub Irvine Medical Center), Inc. Facility NPI 1184655797

Medicare Profile & Education

Medical School

Tulane University School Of Medicine

Graduation Year

1989

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Specialist in Irvine, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

37 Yrs -5.9 yrs vs City Avg

City Avg: 42.9 Yrs

State Avg: 38.0 Yrs

Regional Practice Density

44 Specialists

Practicing in Irvine, CA (6446 Statewide)

Telehealth Adoption Rate

2.3% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

81.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Chun (37 Years) 37 Yrs

Irvine Specialty Average (42.9 Years) 42.9 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
77080 Dxa bone density measurement of hip, pelvis, spine	109	109	$500.00	$44.13
77067 Screening mammography	57	57	$645.00	$144.69
10005 Fine needle aspiration of first lesion using ultrasound guidance	49	48	$500.00	$115.83
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	45	45	$396.11	$117.52
76536 Ultrasound of head and neck	30	28	$550.00	$125.66
76981 Elastography ultrasound of organ tissue	28	28	$650.00	$115.49
77065 Diagnostic mammography of 1 breast	25	25	$695.00	$141.92
19081 Biopsy of breast accessed through the skin with stereotactic guidance	20	20	$3500.00	$558.48
76641 Complete ultrasound scan of 1 breast	17	17	$794.12	$160.12
77063 Screening digital tomography of both breasts	14	14	$150.00	$57.29

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
77080 Dxa bone density measurement of hip, pelvis, spine	89	89	$500.00	$43.63
10005 Fine needle aspiration of first lesion using ultrasound guidance	51	49	$500.00	$121.71
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	46	46	$400.00	$121.56
77067 Screening mammography	40	40	$645.00	$147.22
76536 Ultrasound of head and neck	38	36	$550.00	$128.99
76641 Complete ultrasound scan of 1 breast	30	30	$666.67	$146.53
77065 Diagnostic mammography of 1 breast	23	22	$695.00	$144.12
19081 Biopsy of breast accessed through the skin with stereotactic guidance	19	19	$3500.00	$365.85
77066 Diagnostic mammography of both breasts	18	18	$795.00	$181.98
19083 Biopsy of breast and placement of locating device using ultrasound, first growth	15	15	$3500.00	$580.58

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
77067 Screening mammography	70	70	$645.00	$149.22
77080 Dxa bone density measurement of hip, pelvis, spine	53	53	$500.00	$42.92
77065 Diagnostic mammography of 1 breast	42	37	$695.00	$147.19
10005 Fine needle aspiration of first lesion using ultrasound guidance	41	38	$500.00	$110.70
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	32	32	$400.00	$122.89
76641 Complete ultrasound scan of 1 breast	31	27	$566.13	$136.38
G0279 Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066)	22	19	$150.00	$59.52
76536 Ultrasound of head and neck	21	21	$550.00	$132.32
71046 X-ray of chest, 2 views	21	21	$240.00	$39.05
77066 Diagnostic mammography of both breasts	16	16	$795.00	$177.71
72148 MRI scan of lower spinal canal	16	16	$2100.00	$227.88
19081 Biopsy of breast accessed through the skin with stereotactic guidance	15	14	$3500.00	$578.25
19083 Biopsy of breast and placement of locating device using ultrasound, first growth	14	14	$3500.00	$607.62
19283 Placement of breast localization devices accessed through the skin with stereotactic guidance	14	13	$1178.57	$151.49
76700 Ultrasound of abdomen	12	12	$750.00	$137.67

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
77067 Screening mammography	85	85	$645.00	$153.75
77080 Dxa bone density measurement of hip, pelvis, spine	72	72	$500.00	$44.33
76641 Complete ultrasound scan of 1 breast	40	29	$450.00	$123.95
10005 Fine needle aspiration of first lesion using ultrasound guidance	33	31	$500.00	$131.46
77065 Diagnostic mammography of 1 breast	26	23	$695.00	$149.84
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	25	25	$400.00	$124.38
76536 Ultrasound of head and neck	22	21	$550.00	$137.01
19083 Biopsy of breast and placement of locating device using ultrasound, first growth	16	16	$3500.00	$674.08
77066 Diagnostic mammography of both breasts	11	11	$795.00	$189.85

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
Q9967 Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml	1,300	13	$4.00	$0.11
77067 Screening mammography	48	48	$645.00	$158.58
76536 Ultrasound of head and neck	41	34	$550.00	$135.05
10005 Fine needle aspiration of first lesion using ultrasound guidance	38	37	$500.00	$123.23
76641 Complete ultrasound scan of 1 breast	35	21	$450.00	$123.49
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	28	28	$393.75	$119.32
77080 Dxa bone density measurement of hip, pelvis, spine	26	26	$500.00	$45.67
77065 Diagnostic mammography of 1 breast	25	23	$695.00	$154.73
76700 Ultrasound of abdomen	18	18	$750.00	$142.01
19081 Biopsy of breast accessed through the skin with stereotactic guidance	11	11	$3500.00	$711.25

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
77067 Screening mammography	60	60	$645.00	$149.05
76536 Ultrasound of head and neck	43	40	$547.67	$128.16
76641 Complete ultrasound scan of 1 breast	40	28	$450.00	$118.31
77080 Dxa bone density measurement of hip, pelvis, spine	40	40	$500.00	$43.87
10005 Fine needle aspiration of first lesion using ultrasound guidance	33	31	$501.52	$131.90
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	25	25	$400.00	$114.53
77065 Diagnostic mammography of 1 breast	13	13	$695.00	$147.71
71046 X-ray of chest, 2 views	11	11	$240.00	$34.65

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
Q9967 Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml	3,100	30	$4.00	$0.12
A9579 Injection, gadolinium-based magnetic resonance contrast agent, not otherwise specified (nos), per ml	440	22	$20.00	$1.86
77080 Dxa bone density measurement of hip, pelvis, spine	148	148	$500.00	$47.19
77067 Screening mammography	87	87	$645.00	$154.43
76641 Complete ultrasound scan of 1 breast	50	35	$450.00	$121.38
72148 MRI scan of lower spinal canal	49	48	$2100.00	$220.19
71046 X-ray of chest, 2 views	44	44	$240.00	$33.96
76536 Ultrasound of head and neck	44	41	$550.00	$132.99
10022 Fine needle aspiration using imaging guidance	40	31	$500.00	$156.13
70551 Mri scan of brain without contrast	40	39	$2100.00	$251.02
71250 Ct scan of chest without contrast	36	35	$1600.00	$175.43
73721 Mri scan of leg joint without contrast	32	25	$2100.00	$257.97
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	31	31	$400.00	$116.13
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	26	26	$450.00	$66.02
76700 Ultrasound of abdomen	26	25	$750.00	$136.72
77065 Diagnostic mammography of 1 breast	24	23	$695.00	$152.43
73221 Mri scan of arm joint without contrast	23	21	$2100.00	$263.34
72141 MRI scan of upper spinal canal	17	17	$2100.00	$221.25
77066 Diagnostic mammography of both breasts	16	16	$795.00	$193.41
74176 Ct scan of abdomen and pelvis without contrast	12	12	$1800.00	$223.24
93880 Ultrasound of both sides of head and neck blood flow	11	11	$1000.00	$233.21
70547 Mri scan of blood vessels of neck without contrast	11	11	$2100.00	$328.62

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
Q9967 Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml	3,500	33	$4.00	$0.12
A9579 Injection, gadolinium-based magnetic resonance contrast agent, not otherwise specified (nos), per ml	460	23	$20.00	$1.87
71020 X-ray of chest, 2 views, front and side	115	110	$240.00	$30.86
G0202 Screening mammography, bilateral (2-view study of each breast), including computer-aided detection (cad) when performed	107	107	$645.00	$150.85
77080 Dxa bone density measurement of hip, pelvis, spine	72	72	$500.00	$45.45
72148 MRI scan of lower spinal canal	55	53	$2100.00	$222.38
76641 Complete ultrasound scan of 1 breast	50	32	$450.00	$120.17
76700 Ultrasound of abdomen	47	47	$750.00	$136.17
73721 Mri scan of leg joint without contrast	41	35	$2100.00	$244.35
76536 Ultrasound of head and neck	40	37	$550.00	$131.87
72100 X-ray of lower and sacral spine, 2-3 views	39	38	$270.00	$39.00
10022 Fine needle aspiration using imaging guidance	33	26	$500.00	$155.17
70551 Mri scan of brain without contrast	29	28	$2100.00	$250.61
72040 X-ray of upper spine, 2-3 views	27	27	$250.00	$36.60
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	24	24	$400.00	$115.21
73120 X-ray of hand, 2 views	24	16	$190.00	$29.16
72141 MRI scan of upper spinal canal	23	23	$2100.00	$215.43
G0206 Diagnostic mammography, including computer-aided detection (cad) when performed; unilateral	23	22	$695.00	$148.94
72170 X-ray of pelvis, 1-2 views	22	22	$240.00	$35.66
76770 Complete ultrasound scan behind abdominal cavity	20	18	$750.00	$126.39
73221 Mri scan of arm joint without contrast	19	19	$2100.00	$238.66
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	19	18	$450.00	$65.87
73565 X-ray of both knees while standing	19	17	$200.00	$40.17
71250 Ct scan of chest without contrast	17	17	$1600.00	$171.14
93970 Ultrasound study of arm or leg veins with compression and maneuvers	14	14	$1200.00	$219.63
93880 Ultrasound of both sides of head and neck blood flow	14	14	$1000.00	$225.35
74150 Ct scan of abdomen without contrast	13	13	$1600.00	$165.28
73560 X-ray of knee, 1-2 views	13	11	$220.00	$34.33
73502 X-ray of hip, 2-3 views	12	12	$240.00	$46.35
76856 Complete ultrasound scan of pelvis	11	11	$600.00	$106.83

Medical Specialties & State Licenses

Specialist Primary Specialty

NUCC Taxonomy Code: 174400000X

State License CA A50023

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

Hospital & Practice Group Affiliations

United Medical Imaging Healthcare Inc

11160 Warner Ave, Fountain Valley, CA 927084010

Phone: 7146197500

United Medical Imaging Healthcare Inc

3513 Whittier Blvd, Los Angeles, CA 900231765

Phone: 3232621814

Practice Associates & Co-Workers

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

40 Associated Practitioners

Dakotah Storay , LCSW

Social Worker - Clinical

NPI 1093285009

Licensed Clinical Social Worker

Vinh Tonthat

Emergency Medicine

NPI 1104245414

Dr. Derrick Hong , MD

Hospitalist

NPI 1124040696

Doctor of Medicine (M.D.)

Dr. Brett Morenz , MD

Hospitalist

NPI 1134548639

Doctor of Medicine (M.D.)

Lauren Dahl , LCSW

Social Worker - Clinical

NPI 1144943812

Licensed Clinical Social Worker

Dr. Thomas Ryu , DO

Emergency Medicine - Emergency Medical Services

NPI 1164477410

Doctor of Osteopathic Medicine (D.O.)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active September 15, 2008

NPI status registered as active in NPPES database

📍

Updated Practice Location September 15, 2008

Registered at 16200 SAND CANYON AVE, IRH DEPARTMENT OF RADIOLOGY, IRVINE, CA 926183714 (Tel: 9497532365)

📍

Updated Business Mailing Address September 15, 2008

Registered at 16200 SAND CANYON AVE, IRH DEPARTMENT OF RADIOLOGY, IRVINE, CA 926183714 (Tel: 9497532365)

👤

Provider Name / Credentials Updated September 15, 2008

Recorded as G. MICHAEL CHUN, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) September 15, 2008

Specialist (License #A50023 in CA)

🟢

Initial NPI Registration & Enumeration June 26, 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: 1578590899

Entity Type:

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

Enumeration Date: June 26, 2006

Last Update: September 15, 2008

Sole Proprietor: No

Update or Correct Profile

Mailing Address

16200 Sand Canyon Ave, Irh Department Of Radiology

Irvine, CA 926183714

Phone: 9497532365

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.