Active NPI 1699739607 Individual Practitioner Male Practitioner

Dr. Reginald Kai Mason , MD

Surgery • Alton, IL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Reginald Mason, MD is a certified Surgery practicing in Alton, IL. With approximately 31 years of clinical experience since completing medical education in 1995, Dr. Mason delivers high-quality medical care to the local community at 2 SAINT ANTHONYS WAY STE 105.

Dr. Mason maintains professional affiliations with Vidant Medical Group Llc, Osf Multi-Specialty Group, St Vincent Hospital and accepts Medicare assignment.

Frequently performed procedures and clinical services include biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, removal of polyps or growths of large bowel using an endoscope with mechanical snare, follow-up hospital inpatient care per day. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

2 Saint Anthonys Way Ste 105

Alton, IL 620024580

Telephone 6184652761

Fax 6184654750

Medicare Profile & Education

Medical School

Other

Graduation Year

1995

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Alton, IL

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

31 Yrs +9.0 yrs vs City Avg

City Avg: 22.0 Yrs

State Avg: 27.3 Yrs

Regional Practice Density

7 Specialists

Practicing in Alton, IL (1624 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

89.6% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Mason (31 Years) 31 Yrs

Alton Specialty Average (22.0 Years) 22.0 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
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	22	22	$2068.00	$104.55
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	20	20	$2525.00	$255.21
99231 Follow-up hospital inpatient care per day, typically 15 minutes	18	12	$115.56	$47.77
45380 Biopsy of large bowel using an endoscope	15	15	$2400.00	$189.09
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	15	14	$388.00	$125.88
99221 Initial hospital inpatient care per day, typically 30 minutes	13	13	$260.15	$82.02

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	24	22	$246.67	$63.26

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	14	13	$174.21	$92.10
99202 New patient office or other outpatient visit, typically 20 minutes	12	12	$144.50	$74.06

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	46	43	$201.00	$93.10
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	36	36	$1113.00	$250.28
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	34	27	$119.50	$55.60
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	32	32	$302.00	$114.42
99213 Established patient office or other outpatient visit, typically 15 minutes	31	28	$118.45	$68.41
99202 New patient office or other outpatient visit, typically 20 minutes	30	30	$209.00	$73.52
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	27	27	$190.41	$84.75
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	25	25	$970.00	$89.20
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	23	20	$173.74	$100.96
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	15	15	$3779.80	$341.45
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	15	15	$105.33	$18.93
76937 Ultrasonic guidance for blood vessel access	15	15	$49.80	$14.05
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	14	14	$290.00	$137.89
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	13	12	$277.92	$111.79
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	13	13	$71.85	$36.46
45380 Biopsy of large bowel using an endoscope	12	12	$1090.00	$157.45
45378 Diagnostic exam of large bowel using a flexible endoscope	11	11	$989.00	$145.95

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	110	86	$117.00	$52.32
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	75	75	$1113.00	$254.11
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	50	44	$173.00	$80.59
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	49	47	$970.00	$113.55
99202 New patient office or other outpatient visit, typically 20 minutes	44	44	$123.73	$51.65
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	33	31	$70.00	$26.37
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	24	23	$694.00	$169.56
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	22	22	$262.00	$132.34
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	22	22	$180.36	$77.17
45378 Diagnostic exam of large bowel using a flexible endoscope	21	21	$989.00	$163.41
45380 Biopsy of large bowel using an endoscope	19	19	$1090.00	$117.40
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	17	17	$694.00	$193.23
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	12	12	$2200.00	$325.28
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	12	12	$154.00	$17.77
76937 Ultrasonic guidance for blood vessel access	12	12	$27.00	$13.79

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	140	108	$110.00	$51.24
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	96	96	$1113.00	$260.60
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	81	74	$159.00	$79.02
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	54	53	$970.00	$110.70
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	47	47	$173.00	$76.41
99202 New patient office or other outpatient visit, typically 20 minutes	44	44	$118.00	$50.83
45378 Diagnostic exam of large bowel using a flexible endoscope	37	37	$989.00	$174.91
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	36	35	$694.00	$181.14
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	31	30	$694.00	$181.94
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	30	27	$70.00	$25.59
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	26	26	$246.00	$129.43
45380 Biopsy of large bowel using an endoscope	24	24	$1090.00	$95.61
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	20	20	$2200.00	$327.67
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	19	19	$154.00	$17.86
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	17	17	$857.00	$100.83
43450 Dilation of esophagus	14	14	$403.00	$43.89
76937 Ultrasonic guidance for blood vessel access	14	14	$27.00	$13.55
49505 Repair of groin hernia (5 years or older)	12	12	$862.00	$531.97

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	101	86	$110.00	$51.00
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	89	87	$1031.00	$256.02
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	74	70	$159.00	$78.13
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	44	44	$805.45	$113.64
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	42	42	$246.00	$128.57
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	41	40	$694.00	$186.87
99202 New patient office or other outpatient visit, typically 20 minutes	36	36	$118.00	$50.26
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	36	36	$683.36	$96.50
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	35	35	$694.00	$189.52
45378 Diagnostic exam of large bowel using a flexible endoscope	33	33	$881.73	$188.13
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	30	30	$173.00	$76.23
43450 Dilation of esophagus	23	22	$355.26	$40.78
49505 Repair of groin hernia (5 years or older)	21	21	$903.05	$549.09
45380 Biopsy of large bowel using an endoscope	15	15	$951.33	$156.19

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	158	123	$110.00	$50.33
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	83	83	$246.00	$128.30
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	79	69	$159.00	$77.69
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	70	70	$935.00	$256.43
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	56	56	$173.00	$75.74
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	43	42	$608.00	$94.48
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	37	37	$694.00	$178.75
45378 Diagnostic exam of large bowel using a flexible endoscope	30	29	$694.00	$165.43
99202 New patient office or other outpatient visit, typically 20 minutes	29	29	$118.00	$50.01
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	28	28	$70.00	$25.17
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	25	25	$528.00	$95.50
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	23	23	$694.00	$188.21
45380 Biopsy of large bowel using an endoscope	22	22	$830.00	$154.53
49505 Repair of groin hernia (5 years or older)	16	16	$862.00	$519.70
43450 Dilation of esophagus	12	12	$281.00	$40.51
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	12	12	$2200.00	$341.54

Medical Specialties & State Licenses

CMS Verified: 2025-10-20

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License IL 036169863

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.

Surgery

NUCC Taxonomy Code: 208600000X

State License VA 0101236379

Surgery

NUCC Taxonomy Code: 208600000X

State License NC 2021-03370

Hospital & Practice Group Affiliations

St Vincent Hospital

1631 Hospital Dr, Santa Fe, NM 875057691

Phone: 5059825014

St Vincent Hospital

455 Saint Michaels Dr, Santa Fe, NM 875057601

Osf Multi-Specialty Group

2 Saint Anthonys Way, Alton, IL 620024580

Phone: 6184652761

Vidant Medical Group Llc

700 Academy St S, Ahoskie, NC 279103264

Phone: 2522095404

St Vincent Hospital

433 Saint Michaels Dr, Santa Fe, NM 875057601

Phone: 5059881232

St Vincent Hospital

445 Saint Michaels Dr, Santa Fe, NM 875057601

Phone: 5059138900

St Vincent Hospital

1631 Hospital Dr, Santa Fe, NM 875054728

Phone: 5059134780

Secondary Practice Locations

500 Academy St S

Ahoskie, NC 279103248

Phone: 8044454643

Practice Associates & Co-Workers

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

1 Associated Practitioners

Dr. Khalid Naseer , MD

Internal Medicine - Gastroenterology

NPI 1851341366

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

10 Historical Events

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) October 20, 2025

Surgery (License #0101236379 in VA)

📍

Updated Business Mailing Address July 18, 2025

Registered at PO BOX 1187, DUNNSVILLE, VA 224541187 (Tel: 8044454643)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 18, 2025

Surgery (License #2021-03370 in NC)

📍

Updated Practice Location May 02, 2024

Registered at 2 SAINT ANTHONYS WAY STE 105, ALTON, IL 620024580 (Tel: 6184652761)

✅

NPI Profile Active November 27, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location November 27, 2013

Registered at 659 HOSPITAL RD, BLDG. A, SUITE 203, TAPPAHANNOCK, VA 225605000 (Tel: 8044436232)

📍

Updated Business Mailing Address November 27, 2013

Registered at 856 J CLYDE MORRIS BLVD, SUITE A, NEWPORT NEWS, VA 236011318

👤

Provider Name / Credentials Updated November 27, 2013

Recorded as REGINALD MASON, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) November 27, 2013

Surgery (License #0101236379 in VA)

🟢

Initial NPI Registration & Enumeration April 14, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews

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NPI Administrative Meta

NPI Number: 1699739607

Entity Type:

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

Enumeration Date: April 14, 2006

Last Update: October 20, 2025

Sole Proprietor: No

Update or Correct Profile

Mailing Address

Po Box 1187

Dunnsville, VA 224541187

Phone: 8044454643

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.