Active NPI 1619293149 Individual Practitioner Male Practitioner

Dr. Gregory Thomas Bismack , MD

Internal Medicine • Effingham, IL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Gregory Bismack, MD is a certified Internal Medicine practicing in Effingham, IL. With approximately 16 years of clinical experience since graduating from Wayne State University School Of Medicine in 2010, Dr. Bismack delivers high-quality medical care to the local community at 503 N MAPLE ST.

Dr. Bismack maintains professional affiliations with Cep America - Illinois Snf Llp, Galen Inpatient Physicians Pc, Ste Genevieve County Memorial Hospital 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, hospital discharge day management, more than, critical care, first. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

503 N Maple St

Effingham, IL 624012006

Telephone 2173422121

Associated Practice Facility / Clinic

🏢 St Anthonys Memorial Hospital Of The Hospital Sisters Of The Third Facility NPI 1306800602

Medicare Profile & Education

Medical School

Wayne State University School Of Medicine

Graduation Year

2010

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Effingham, IL

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

16 Yrs -13.3 yrs vs City Avg

City Avg: 29.3 Yrs

State Avg: 28.9 Yrs

Regional Practice Density

11 Specialists

Practicing in Effingham, IL (7544 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

85.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Bismack (16 Years) 16 Yrs

Effingham Specialty Average (29.3 Years) 29.3 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
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	492	200	$616.34	$113.65
99239 Hospital discharge day management, more than 30 minutes	243	236	$640.58	$109.31
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	206	114	$422.92	$75.47
99291 Critical care, first 30-74 minutes	57	44	$1617.68	$205.43
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	36	36	$1164.33	$162.75
99497 Advance care planning, first 30 minutes	16	16	$471.50	$72.70

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	451	256	$589.46	$117.04
99239 Hospital discharge day management, more than 30 minutes	245	238	$620.53	$112.73
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	222	213	$1136.89	$170.99
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	66	48	$404.36	$77.91
99238 Hospital discharge day management, 30 minutes or less	47	47	$412.09	$79.18
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	29	21	$411.83	$103.25
99291 Critical care, first 30-74 minutes	20	15	$1538.85	$212.62
99497 Advance care planning, first 30 minutes	15	15	$448.53	$74.32
99306 Initial nursing facility visit, typically 45 minutes per day	11	11	$896.73	$179.90

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	526	241	$560.45	$100.56
99239 Hospital discharge day management, more than 30 minutes	180	170	$589.50	$102.58
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	132	128	$1085.50	$194.54
99217 Hospital observation care on day of discharge	127	122	$398.47	$69.77
99220 Hospital observation care, typically 70 minutes	121	115	$999.89	$175.74
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	111	80	$391.08	$70.23
99291 Critical care, first 30-74 minutes	81	28	$1463.74	$216.67
99238 Hospital discharge day management, 30 minutes or less	51	51	$398.78	$69.90
99226 Subsequent observation care, typically 35 minutes per day	32	28	$566.72	$98.69
99225 Subsequent observation care, typically 25 minutes per day	27	24	$393.00	$69.31
99497 Advance care planning, first 30 minutes	16	15	$426.38	$76.76
99236 Initial hospital care with same-day admission and discharge with high level of medical decision making, per day, if using time, at least 85 minutes	14	14	$1168.00	$205.98
99306 Initial nursing facility visit, typically 45 minutes per day	12	12	$905.00	$163.96

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	431	184	$526.36	$101.56
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	265	153	$250.41	$67.81
99231 Follow-up hospital inpatient care per day, typically 15 minutes	150	66	$96.00	$35.49
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	135	134	$991.81	$195.03
99239 Hospital discharge day management, more than 30 minutes	128	122	$554.79	$104.01
99238 Hospital discharge day management, 30 minutes or less	117	116	$277.62	$68.98
99217 Hospital observation care on day of discharge	96	95	$344.02	$69.53
99291 Critical care, first 30-74 minutes	82	41	$1402.95	$219.12
99220 Hospital observation care, typically 70 minutes	79	76	$950.22	$177.45
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	44	42	$346.07	$124.96
99226 Subsequent observation care, typically 35 minutes per day	40	32	$537.00	$101.65
99219 Hospital observation care, typically 50 minutes	25	25	$332.00	$126.25

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	498	258	$168.10	$68.52
99231 Follow-up hospital inpatient care per day, typically 15 minutes	346	171	$95.17	$36.68
99238 Hospital discharge day management, 30 minutes or less	201	195	$164.55	$67.71
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	118	111	$328.92	$128.48
99219 Hospital observation care, typically 50 minutes	77	77	$326.27	$126.42
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	74	65	$229.64	$99.35
99217 Hospital observation care on day of discharge	40	40	$166.85	$67.73
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	29	29	$498.00	$192.08
99239 Hospital discharge day management, more than 30 minutes	18	18	$246.06	$101.06

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	469	233	$173.55	$67.12
99231 Follow-up hospital inpatient care per day, typically 15 minutes	235	117	$95.30	$36.22
99238 Hospital discharge day management, 30 minutes or less	169	165	$172.74	$66.55
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	119	115	$335.43	$126.71
99219 Hospital observation care, typically 50 minutes	91	87	$330.38	$124.05
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	85	77	$253.95	$95.46
99217 Hospital observation care on day of discharge	55	54	$172.27	$66.63
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	18	18	$498.00	$180.58
99239 Hospital discharge day management, more than 30 minutes	14	14	$263.00	$99.81

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	428	198	$339.78	$71.94
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	247	110	$348.07	$106.56
99238 Hospital discharge day management, 30 minutes or less	100	99	$311.84	$73.05
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	83	83	$738.17	$207.45
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	58	58	$505.28	$134.02
99231 Follow-up hospital inpatient care per day, typically 15 minutes	50	32	$151.88	$37.30
99239 Hospital discharge day management, more than 30 minutes	46	45	$637.57	$106.68
99217 Hospital observation care on day of discharge	39	39	$357.34	$73.27
99219 Hospital observation care, typically 50 minutes	29	29	$686.53	$133.20
99225 Subsequent observation care, typically 25 minutes per day	22	19	$402.06	$73.01

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	390	175	$250.79	$71.71
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	232	117	$328.00	$105.46
99238 Hospital discharge day management, 30 minutes or less	117	115	$278.56	$73.32
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	89	89	$600.71	$206.29
99239 Hospital discharge day management, more than 30 minutes	53	53	$467.57	$105.14
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	48	47	$416.32	$138.29
99217 Hospital observation care on day of discharge	36	36	$282.84	$69.29
99231 Follow-up hospital inpatient care per day, typically 15 minutes	33	23	$198.60	$39.30
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	27	25	$105.52	$74.05
99220 Hospital observation care, typically 70 minutes	22	22	$625.00	$189.60
99219 Hospital observation care, typically 50 minutes	18	18	$428.78	$132.57
99225 Subsequent observation care, typically 25 minutes per day	17	14	$224.12	$73.28
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$140.00	$133.64

Medical Specialties & State Licenses

CMS Verified: 2026-06-22

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License IL 036.155470

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Hospitalist

NUCC Taxonomy Code: 208M00000X

State License MO 2022010983

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Hospitalist

NUCC Taxonomy Code: 208M00000X

State License IL 036155470

Internal Medicine

NUCC Taxonomy Code: 207R00000X

State License MI 4301097035

Hospital & Practice Group Affiliations

Ste Genevieve County Memorial Hospital

800 Genevieve Dr, Ste Genevieve, MO 636701434

Phone: 5738837772

Cep America-Illinois Hospitalists, Llp

503 N Maple St, Effingham, IL 624012006

Phone: 2173422121

Cep America - Illinois Snf Llp

1021 W E St, Belleville, IL 622201055

Phone: 6182332095

Galen Inpatient Physicians Pc

12303 De Paul Dr, Bridgeton, MO 630442512

Phone: 3143446000

Secondary Practice Locations

401 Corporate Park Dr

Clayton, MO 631054201

Phone: 6362284149

2351 Frank Scott Pkwy E

O Fallon, IL 622697457

Phone: 6362884149

Practice Associates & Co-Workers

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

16 Associated Practitioners

Linda Cheng , CRNA

Nurse Anesthetist, Certified Registered

NPI 1134235526

Certified Registered Nurse Anesthetist

Dr. Steven Jones , MD

Pathology - Anatomic Pathology & Clinical Pathology

NPI 1215998174

Doctor of Medicine (M.D.)

Bridget Estes , CRNA

Nurse Anesthetist, Certified Registered

NPI 1265929160

Certified Registered Nurse Anesthetist

Dr. Jessica Prange , MD

Internal Medicine - Cardiovascular Disease

NPI 1306089024

Doctor of Medicine (M.D.)

Joan Mccord , CRNA

Nurse Anesthetist, Certified Registered

NPI 1316995731

Certified Registered Nurse Anesthetist

Shawn Nies , FNP-C

Nurse Practitioner - Family

NPI 1356094650

Family Nurse Practitioner (Certified)

Career & Practice History Timeline

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

21 Historical Events

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 22, 2026

Hospitalist (License #2022010983 in MO)

📍

Updated Practice Location December 05, 2022

Registered at 503 N MAPLE ST, EFFINGHAM, IL 624012006 (Tel: 2173422121)

📍

Updated Business Mailing Address December 05, 2022

Registered at 801 SWARTHMORE LN, UNIVERSITY CITY, MO 631303620 (Tel: 2488082485)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 05, 2022

Internal Medicine (License #4301097035 in MI)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) August 23, 2021

Internal Medicine (License #036.155470 in IL)

📍

Updated Business Mailing Address August 03, 2021

Registered at 405 ARBOR VW, BRANDON, MS 390477073 (Tel: 2488082485)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 14, 2021

Internal Medicine (License #4301097035 in MI)

📍

Updated Practice Location October 17, 2018

Registered at 1030 RIVER OAKS DR, FLOWOOD, MS 392329553 (Tel: 6013762832)

📍

Updated Business Mailing Address October 17, 2018

Registered at 2550 FLOWOOD DR STE 402, FLOWOOD, MS 392329307 (Tel: 6013762832)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) October 17, 2018

Hospitalist (License #26127 in MS)

✅

NPI Profile Active April 25, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location April 25, 2017

Registered at 2799 W GRAND BLVD, CFP-417, DETROIT, MI 482022608 (Tel: 3139168144)

📍

Updated Business Mailing Address April 25, 2017

Registered at 2799 W GRAND BLVD, DETROIT, MI 482022608 (Tel: 3139168144)

👤

Provider Name / Credentials Updated April 25, 2017

Recorded as GREGORY BISMACK, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 25, 2017

Internal Medicine (License #4301097035 in MI)

✅

NPI Profile Active June 11, 2014

NPI status registered as active in NPPES database

📍

Updated Practice Location June 11, 2014

Registered at 36475 FIVE MILE RD, MICHIGAN ACADEMIC HEALTH GROUP, LIVONIA, MI 481541971 (Tel: 7347445010)

📍

Updated Business Mailing Address June 11, 2014

Registered at 36475 FIVE MILE RD, MICHIGAN ACADEMIC HEALTH GROUP, LIVONIA, MI 481541971 (Tel: 7347445010)

👤

Provider Name / Credentials Updated June 11, 2014

Recorded as GREGORY BISMACK, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 11, 2014

Internal Medicine (License #4301097035 in MI)

🟢

Initial NPI Registration & Enumeration April 08, 2010

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: 1619293149

Entity Type:

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

Enumeration Date: April 08, 2010

Last Update: June 22, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

801 Swarthmore Ln

University City, MO 631303620

Phone: 2488082485

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.