Active NPI 1003952458 Individual Practitioner Male Practitioner

Dr. Eldad Shaul Bialecki , MD

Internal Medicine - Gastroenterology • O Fallon, MO

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Eldad Bialecki, MD is a certified Internal Medicine - Gastroenterology practicing in O Fallon, MO. With approximately 19 years of clinical experience since graduating from Saint Louis University School Of Medicine in 2007, Dr. Bialecki delivers high-quality medical care to the local community at 20 PROGRESS POINT PKWY STE 206.

Dr. Bialecki is affiliated with Physician Groups Lc and accepts Medicare assignment.

Frequently performed procedures and clinical services include subsequent hospital care with moderate levelof medical decision making, if using time, at least, initial hospital care with straightforward or low-level medical decision making, if using time, at least, biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

20 Progress Point Pkwy Ste 206

O Fallon, MO 633682207

Telephone 6363441073

Fax 6363441075

Medicare Profile & Education

Medical School

Saint Louis University School Of Medicine

Graduation Year

2007

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine - Gastroenterology in O Fallon, MO

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

19 Yrs -6.8 yrs vs City Avg

City Avg: 25.8 Yrs

State Avg: 28.9 Yrs

Regional Practice Density

5 Specialists

Practicing in O Fallon, MO (425 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

65.8% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Bialecki (19 Years) 19 Yrs

O Fallon Specialty Average (25.8 Years) 25.8 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
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	175	95	$182.93	$75.63
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	58	58	$329.83	$125.77
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	52	52	$443.16	$102.63
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	51	51	$635.09	$238.66
45380 Biopsy of large bowel using an endoscope	33	33	$597.90	$153.75
99213 Established patient office or other outpatient visit, typically 15 minutes	24	24	$173.00	$87.96
43450 Dilation of esophagus	23	22	$200.00	$38.25
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	21	18	$252.38	$124.04
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	20	20	$363.22	$110.59
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	17	17	$550.00	$176.10
45378 Diagnostic exam of large bowel using a flexible endoscope	16	15	$546.35	$158.68
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	13	13	$550.00	$176.05
G0500 Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	12	11	$18.90	$5.41
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$337.45	$162.14
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$206.18	$107.45

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	81	49	$170.00	$77.07
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	60	60	$620.00	$243.66
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	51	51	$431.00	$113.78
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	47	47	$326.00	$126.75
45380 Biopsy of large bowel using an endoscope	37	37	$576.00	$149.54
96365 Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less	37	11	$168.00	$61.66
99213 Established patient office or other outpatient visit, typically 15 minutes	36	35	$110.00	$87.85
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	29	25	$162.00	$121.31
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	22	22	$550.00	$176.54
43450 Dilation of esophagus	19	18	$200.00	$38.63
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	16	16	$183.00	$109.26
36415 Insertion of needle into vein for collection of blood sample	16	14	$16.00	$8.40
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	14	14	$478.00	$168.95
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	14	13	$325.00	$113.85
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	11	11	$550.00	$176.23

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	109	56	$170.00	$70.59
45380 Biopsy of large bowel using an endoscope	57	57	$576.00	$164.38
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	47	46	$326.00	$133.89
99213 Established patient office or other outpatient visit, typically 15 minutes	45	36	$110.00	$88.15
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	36	24	$246.00	$101.46
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	34	34	$431.00	$120.47
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	33	33	$478.00	$196.39
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	25	25	$620.00	$255.19
43450 Dilation of esophagus	22	21	$200.00	$39.66
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	20	15	$162.00	$126.13
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	13	12	$325.00	$114.75
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$183.00	$112.12

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	134	61	$170.00	$71.83
45380 Biopsy of large bowel using an endoscope	79	79	$573.87	$172.99
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	67	67	$430.69	$109.34
99213 Established patient office or other outpatient visit, typically 15 minutes	54	46	$109.33	$91.44
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	46	46	$620.00	$255.64
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	44	44	$326.00	$135.91
36415 Insertion of needle into vein for collection of blood sample	25	20	$16.00	$3.00
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	24	19	$161.00	$123.52
43450 Dilation of esophagus	22	22	$200.00	$38.70
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	17	12	$246.00	$103.22
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	17	17	$325.00	$89.79
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	16	16	$550.00	$185.92
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	15	15	$478.00	$200.12
45378 Diagnostic exam of large bowel using a flexible endoscope	13	13	$481.23	$165.85
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	13	11	$36.00	$7.77

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	129	60	$161.00	$73.44
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	64	60	$410.00	$128.03
45380 Biopsy of large bowel using an endoscope	62	62	$548.00	$161.02
J7050 Infusion, normal saline solution, 250 cc	59	11	$2.00	$0.60
99213 Established patient office or other outpatient visit, typically 15 minutes	45	40	$104.00	$74.07
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	40	40	$620.00	$254.44
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	34	29	$154.00	$103.87
99221 Initial hospital inpatient care per day, typically 30 minutes	33	32	$228.00	$103.52
43450 Dilation of esophagus	26	25	$190.00	$40.64
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	26	26	$310.00	$140.02
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	22	21	$309.00	$115.48
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	20	16	$234.00	$105.76
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	18	18	$550.00	$187.58
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	15	15	$550.00	$179.20
36415 Insertion of needle into vein for collection of blood sample	14	12	$16.00	$2.98
45378 Diagnostic exam of large bowel using a flexible endoscope	14	13	$460.00	$161.36

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	207	93	$153.00	$72.84
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	86	83	$390.00	$117.19
45380 Biopsy of large bowel using an endoscope	69	68	$522.00	$177.92
99213 Established patient office or other outpatient visit, typically 15 minutes	64	50	$99.00	$73.82
J7050 Infusion, normal saline solution, 250 cc	58	11	$2.00	$0.60
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	50	38	$146.00	$108.18
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	49	49	$295.00	$137.81
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	46	45	$620.00	$248.58
99221 Initial hospital inpatient care per day, typically 30 minutes	44	43	$217.00	$100.31
43450 Dilation of esophagus	44	35	$181.00	$40.44
36415 Insertion of needle into vein for collection of blood sample	26	21	$16.00	$2.94
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	25	23	$294.00	$122.51
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	21	21	$550.00	$192.39
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	17	17	$550.00	$192.67
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	15	14	$222.00	$104.55
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	13	12	$36.92	$8.46
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$235.00	$164.14
45378 Diagnostic exam of large bowel using a flexible endoscope	12	11	$438.00	$177.00

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	214	108	$139.00	$71.65
45380 Biopsy of large bowel using an endoscope	87	87	$522.00	$178.38
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	83	82	$390.00	$111.04
99213 Established patient office or other outpatient visit, typically 15 minutes	60	49	$89.00	$71.75
99221 Initial hospital inpatient care per day, typically 30 minutes	59	59	$197.00	$100.92
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	50	49	$620.00	$247.53
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	47	47	$268.00	$133.08
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	45	38	$130.00	$105.97
J7050 Infusion, normal saline solution, 250 cc	39	11	$1.00	$0.59
43450 Dilation of esophagus	35	33	$181.00	$39.86
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	34	24	$201.00	$103.59
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	26	26	$550.00	$189.43
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	25	24	$294.00	$116.51
36415 Insertion of needle into vein for collection of blood sample	18	17	$16.00	$2.94
45378 Diagnostic exam of large bowel using a flexible endoscope	16	16	$438.00	$167.22
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$213.00	$162.40
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	13	13	$550.00	$174.64
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	13	13	$393.00	$201.56

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	211	96	$139.00	$70.07
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	108	82	$130.00	$103.68
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	90	84	$390.00	$113.99
99221 Initial hospital inpatient care per day, typically 30 minutes	88	74	$197.00	$99.55
45380 Biopsy of large bowel using an endoscope	78	78	$522.00	$152.95
99213 Established patient office or other outpatient visit, typically 15 minutes	68	59	$89.00	$70.53
99231 Follow-up hospital inpatient care per day, typically 15 minutes	57	34	$88.00	$38.84
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	50	50	$620.00	$249.46
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	43	43	$213.00	$159.80
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	37	37	$268.00	$135.36
43450 Dilation of esophagus	33	32	$181.00	$39.77
36415 Insertion of needle into vein for collection of blood sample	31	23	$16.00	$2.94
43235 Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	25	24	$294.00	$119.44
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	19	19	$550.00	$171.98
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	18	18	$550.00	$183.04
45378 Diagnostic exam of large bowel using a flexible endoscope	11	11	$438.00	$181.52

Medical Specialties & State Licenses

CMS Verified: 2026-03-17

Internal Medicine - Gastroenterology Primary Specialty

NUCC Taxonomy Code: 207RG0100X

State License MO 2003013331

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

Hospital & Practice Group Affiliations

Physician Groups Lc

10 Hospital Dr, Saint Peters, MO 633761659

Phone: 6369167272

Physician Groups Lc

2630 Hwy K, O Fallon, MO 633686624

Phone: 6362405454

Secondary Practice Locations

70 Jungermann Cir Ste 201

Saint Peters, MO 633761619

Phone: 6369169615

Practice Associates & Co-Workers

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

13 Associated Practitioners

Karen Turner , FNP

Nurse Practitioner

NPI 1154849578

Family Nurse Practitioner

Betsey Steimel , APRN FNP

Nurse Practitioner

NPI 1376196162

APRNFNP

Dr. Nikol Smart , MD

Obstetrics & Gynecology

NPI 1417211756

Doctor of Medicine (M.D.)

Dr. Qaiser Jawaid , MD

Internal Medicine - Gastroenterology

NPI 1437110681

Doctor of Medicine (M.D.)

Dr. Milton Ochieng' , MD

Internal Medicine - Gastroenterology

NPI 1477717080

Doctor of Medicine (M.D.)

Anna Boschert

Physician Assistant

NPI 1568236578

Career & Practice History Timeline

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

15 Historical Events

📍

Updated Practice Location March 17, 2026

Registered at 20 PROGRESS POINT PKWY STE 206, O FALLON, MO 633682207 (Tel: 6363441073)

📍

Updated Practice Location September 25, 2025

Registered at 70 JUNGERMANN CIR STE 201, SAINT PETERS, MO 633761619 (Tel: 6369169615)

📍

Updated Practice Location July 24, 2025

Registered at 20 PROGRESS POINT PKWY STE 206, O FALLON, MO 633682207 (Tel: 6363441073)

📍

Updated Business Mailing Address July 24, 2025

Registered at PO BOX 959354, SAINT LOUIS, MO 631959354 (Tel: 6363441073)

✅

NPI Profile Active February 13, 2017

NPI status registered as active in NPPES database

📍

Updated Business Mailing Address February 13, 2017

Registered at PO BOX 23340, SAINT LOUIS, MO 631563340 (Tel: 3143554010)

📍

Updated Practice Location February 13, 2017

Registered at 100 VILLAGE SQ, HAZELWOOD, MO 630421820 (Tel: 3143554010)

👤

Provider Name / Credentials Updated February 13, 2017

Recorded as ELDAD BIALECKI, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) February 13, 2017

Internal Medicine (License #2003013331 in MO)

✅

NPI Profile Active September 02, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location September 02, 2016

Registered at 100 VILLAGE SQ, HAZELWOOD, MO 630421820 (Tel: 3143554010)

📍

Updated Business Mailing Address September 02, 2016

Registered at 100 VILLAGE SQ, HAZELWOOD, MO 630421820 (Tel: 3143554010)

👤

Provider Name / Credentials Updated September 02, 2016

Recorded as ELDAD BIALECKI, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) September 02, 2016

Internal Medicine (License #2003013331 in MO)

🟢

Initial NPI Registration & Enumeration January 30, 2007

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: 1003952458

Entity Type:

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

Enumeration Date: January 30, 2007

Last Update: March 17, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

Po Box 959354

Saint Louis, MO 631959354

Phone: 6363441073

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.