Active NPI 1275528580 Individual Practitioner Male Practitioner

Dr. John Edward Mason , MD

Surgery • Chesterfield, MO

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. John Mason, MD is a certified Surgery practicing in Chesterfield, MO. With approximately 33 years of clinical experience since graduating from Washington University School Of Medicine in 1993, Dr. Mason delivers high-quality medical care to the local community at 226 S WOODS MILL RD.

Dr. Mason is affiliated with St Lukes Medical Group and accepts Medicare assignment.

Frequently performed procedures and clinical services include new patient outpatient office visit, established patient outpatient office visit, initial hospital care with straightforward or low-level 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

226 S Woods Mill Rd
Suite 49 W

Chesterfield, MO 630173662

Telephone 3144341211

Fax 3144344419

Associated Practice Facility / Clinic

🏢 St Louis Surgical Consultants, P.c. Facility NPI 1114911658

Medicare Profile & Education

Medical School

Washington University School Of Medicine

Graduation Year

1993

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Chesterfield, MO

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

33 Yrs -0.7 yrs vs City Avg

City Avg: 33.7 Yrs

State Avg: 26.1 Yrs

Regional Practice Density

12 Specialists

Practicing in Chesterfield, MO (766 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

49.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Mason (33 Years) 33 Yrs

Chesterfield Specialty Average (33.7 Years) 33.7 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
99202 New patient office or other outpatient visit, typically 20 minutes	121	121	$149.00	$71.32
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	61	40	$88.02	$55.86
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	33	31	$275.00	$127.99
99231 Follow-up hospital inpatient care per day, typically 15 minutes	27	16	$78.00	$49.20
47562 Removal of gallbladder using an endoscope	25	25	$1281.00	$636.04
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	23	16	$146.00	$78.00
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	19	19	$406.00	$167.38
49650 Repair of groin hernia using an endoscope	19	19	$842.00	$479.79

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	74	70	$278.00	$127.49
99202 New patient office or other outpatient visit, typically 20 minutes	56	56	$152.00	$69.92
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	54	44	$91.00	$55.17
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	45	30	$146.00	$77.51
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	37	37	$329.00	$162.98
49650 Repair of groin hernia using an endoscope	25	25	$1101.12	$450.34
47562 Removal of gallbladder using an endoscope	19	19	$1366.00	$632.64

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	63	34	$146.00	$69.87
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	55	54	$278.00	$132.33
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	41	41	$329.00	$165.53
99202 New patient office or other outpatient visit, typically 20 minutes	37	37	$152.00	$71.99
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	37	27	$91.00	$55.93
49650 Repair of groin hernia using an endoscope	30	30	$1065.60	$463.10
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	23	18	$217.00	$126.74
47562 Removal of gallbladder using an endoscope	11	11	$1366.00	$647.59

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	64	30	$146.00	$71.69
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	44	44	$215.00	$112.83
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	41	41	$329.00	$167.47
99213 Established patient office or other outpatient visit, typically 15 minutes	38	33	$150.00	$91.91
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	37	36	$278.00	$135.69
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	34	27	$91.00	$56.48
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	23	21	$217.00	$130.39
99202 New patient office or other outpatient visit, typically 20 minutes	22	22	$152.00	$73.39
99221 Initial hospital inpatient care per day, typically 30 minutes	14	13	$206.00	$100.74
47562 Removal of gallbladder using an endoscope	13	13	$1366.00	$647.21
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	12	12	$694.10	$338.01
49650 Repair of groin hernia using an endoscope	11	11	$968.73	$460.50

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93880 Ultrasound of both sides of head and neck blood flow	139	138	$85.53	$40.60
93970 Ultrasound study of arm or leg veins with compression and maneuvers	104	102	$72.02	$34.96
93971 Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers	84	81	$45.90	$22.63
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	71	41	$149.92	$73.43
99202 New patient office or other outpatient visit, typically 20 minutes	61	61	$154.49	$76.54
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	56	48	$287.39	$138.19
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	46	32	$96.26	$45.64
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	45	45	$239.36	$107.05
99213 Established patient office or other outpatient visit, typically 15 minutes	34	31	$153.59	$75.33
93923 Complete ultrasound study of arm and leg arteries	26	26	$46.73	$22.67
49650 Repair of groin hernia using an endoscope	19	19	$1095.58	$464.32
47562 Removal of gallbladder using an endoscope	16	16	$1366.00	$656.75

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93880 Ultrasound of both sides of head and neck blood flow	210	210	$84.23	$40.59
93970 Ultrasound study of arm or leg veins with compression and maneuvers	200	192	$74.63	$35.04
93971 Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers	163	158	$48.96	$22.66
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	68	51	$152.18	$73.09
99221 Initial hospital inpatient care per day, typically 30 minutes	58	55	$208.38	$102.11
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	55	36	$103.24	$44.64
99213 Established patient office or other outpatient visit, typically 15 minutes	54	43	$147.44	$73.77
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	50	50	$328.36	$164.03
99231 Follow-up hospital inpatient care per day, typically 15 minutes	49	38	$82.22	$38.93
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	49	49	$224.69	$107.78
93923 Complete ultrasound study of arm and leg arteries	37	37	$45.19	$22.56
47562 Removal of gallbladder using an endoscope	22	22	$1362.73	$681.44
49650 Repair of groin hernia using an endoscope	22	22	$1246.27	$493.77
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	20	20	$806.60	$338.94
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	15	15	$349.60	$137.68
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	15	14	$216.47	$108.08
99202 New patient office or other outpatient visit, typically 20 minutes	14	14	$195.43	$75.79

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93970 Ultrasound study of arm or leg veins with compression and maneuvers	245	236	$71.00	$34.52
93880 Ultrasound of both sides of head and neck blood flow	216	216	$81.00	$39.99
93971 Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers	180	177	$45.00	$22.43
99231 Follow-up hospital inpatient care per day, typically 15 minutes	77	40	$79.00	$39.03
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	70	49	$145.00	$72.33
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	61	61	$325.39	$162.34
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	61	61	$215.00	$103.34
99213 Established patient office or other outpatient visit, typically 15 minutes	58	41	$145.00	$71.69
99221 Initial hospital inpatient care per day, typically 30 minutes	55	53	$204.00	$100.96
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	34	21	$86.00	$42.97
93923 Complete ultrasound study of arm and leg arteries	27	27	$46.00	$22.22
47562 Removal of gallbladder using an endoscope	26	26	$1354.00	$671.53
49650 Repair of groin hernia using an endoscope	20	20	$1141.20	$487.25
93922 Ultrasound study of arm and leg arteries	20	20	$26.00	$12.71
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	17	17	$693.00	$344.18
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	17	17	$213.00	$105.78
99283 Emergency department visit with low level of medical decision making	12	12	$125.00	$61.80
93924 Ultrasound study of arteries of both legs at rest and exercise	12	12	$51.00	$24.71

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
93880 Ultrasound of both sides of head and neck blood flow	174	173	$80.91	$39.85
93970 Ultrasound study of arm or leg veins with compression and maneuvers	147	141	$70.89	$34.54
99231 Follow-up hospital inpatient care per day, typically 15 minutes	125	56	$79.00	$38.29
93971 Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers	119	117	$44.96	$21.76
99213 Established patient office or other outpatient visit, typically 15 minutes	64	42	$144.38	$70.54
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	58	43	$144.66	$71.33
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	57	57	$325.81	$161.01
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	56	56	$213.84	$104.17
99221 Initial hospital inpatient care per day, typically 30 minutes	51	50	$203.59	$96.99
47562 Removal of gallbladder using an endoscope	25	25	$1351.20	$644.64
93922 Ultrasound study of arm and leg arteries	24	23	$26.00	$12.63
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	21	17	$85.76	$42.44
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	19	18	$213.00	$105.15
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	14	14	$800.43	$325.72
49650 Repair of groin hernia using an endoscope	14	14	$940.71	$478.32
49568 Placement of mesh to repair incisional or abdominal hernia	14	13	$551.71	$272.94
99283 Emergency department visit with low level of medical decision making	12	12	$125.00	$61.53
49505 Repair of groin hernia (5 years or older)	11	11	$1063.64	$525.79
10060 Simple or single drainage of skin abscess	11	11	$233.00	$115.10

Medical Specialties & State Licenses

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License MO 104004

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

205802101 (MO)

Hospital & Practice Group Affiliations

St Lukes Medical Group

232 S Woods Mill Rd, Chesterfield, MO 630173406

Phone: 3145762306

Practice Associates & Co-Workers

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

6 Associated Practitioners

Dr. Christopher Cronin , MD

Surgery

NPI 1043204597

Doctor of Medicine (M.D.)

Dr. Todd Arends , MD

Colon & Rectal Surgery

NPI 1154358745

Doctor of Medicine (M.D.)

Dr. Diana Jiang , MD

Surgery

NPI 1639673833

Doctor of Medicine (M.D.)

Sierra Deguire , AGACNP-BC

Nurse Practitioner - Acute Care

NPI 1649008368

Adult-Gerontology Acute Care Nurse Practitioner (Board Certified)

Dr. Thomas Niesen , MD

Surgery

NPI 1700870250

Doctor of Medicine (M.D.)

Dr. Mari Anne Fahrner , MD

Surgery

NPI 1700870292

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

11 Historical Events

✅

NPI Profile Active February 26, 2018

NPI status registered as active in NPPES database

📍

Updated Practice Location February 26, 2018

Registered at 226 S WOODS MILL RD, SUITE 49 W, CHESTERFIELD, MO 630173662 (Tel: 3144341211)

📍

Updated Business Mailing Address February 26, 2018

Registered at 226 S WOODS MILL RD, SUITE 49 W, CHESTERFIELD, MO 630173662 (Tel: 3144341211)

👤

Provider Name / Credentials Updated February 26, 2018

Recorded as JOHN MASON, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) February 26, 2018

Surgery (License #104004 in MO)

✅

NPI Profile Active February 12, 2015

NPI status registered as active in NPPES database

📍

Updated Practice Location February 12, 2015

Registered at 226 S WOODS MILL RD, SUITE 49 W, CHESTERFIELD, MO 630173662 (Tel: 3144341211)

📍

Updated Business Mailing Address February 12, 2015

Registered at 226 S WOODS MILL RD, SUITE 49 W, CHESTERFIELD, MO 630173662 (Tel: 3144341211)

👤

Provider Name / Credentials Updated February 12, 2015

Recorded as JOHN MASON, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) February 12, 2015

Surgery (License #104004 in MO)

🟢

Initial NPI Registration & Enumeration September 13, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews

No patient reviews submitted yet for Dr. John Mason. Be the first to share your experience!

Only verified registered users can submit ratings, post feedback, and upload facility photos.

NPI Administrative Meta

NPI Number: 1275528580

Entity Type:

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

Enumeration Date: September 13, 2005

Last Update: February 26, 2018

Sole Proprietor: No

Update or Correct Profile

Mailing Address

226 S Woods Mill Rd, Suite 49 W

Chesterfield, MO 630173662

Phone: 3144341211

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.