Active NPI 1477571479 Individual Practitioner Male Practitioner

Dr. Mark P Demus , MD

Emergency Medicine • Hoffman Estates, IL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Mark Demus, MD is a certified Emergency Medicine practicing in Hoffman Estates, IL. With approximately 45 years of clinical experience since graduating from Northwestern University Feinberg Medical School in 1981, Dr. Demus delivers high-quality medical care to the local community at 1555 BARRINGTON RD.

Dr. Demus maintains professional affiliations with Endeavor Health Medical Group, Cepamerica Illinois Llp and accepts Medicare assignment.

Frequently performed procedures and clinical services include emergency department visit for life threatening or functioning severity, established patient outpatient office visit, 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

1555 Barrington Rd

Hoffman Estates, IL 601691019

Telephone 8474906930

Associated Practice Facility / Clinic

🏢 Bruce Goldberg Md S C Facility NPI 1487654190

Medicare Profile & Education

Medical School

Northwestern University Feinberg Medical School

Graduation Year

1981

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Emergency Medicine in Hoffman Estates, IL

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

45 Yrs +10.7 yrs vs City Avg

City Avg: 34.3 Yrs

State Avg: 24.6 Yrs

Regional Practice Density

11 Specialists

Practicing in Hoffman Estates, IL (3389 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

81.6% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Demus (45 Years) 45 Yrs

Hoffman Estates Specialty Average (34.3 Years) 34.3 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
99285 Emergency department visit for life threatening or functioning severity	304	293	$1225.02	$187.73
99213 Established patient office or other outpatient visit, typically 15 minutes	98	97	$175.00	$95.18
99291 Critical care, first 30-74 minutes	92	91	$1612.00	$222.67
99284 Emergency department visit with moderate level of medical decision making	86	84	$833.47	$129.68
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	70	70	$242.00	$118.96
93042 Interpretation and report of electrical activity of heart using 1-3 leads	39	39	$53.00	$7.02

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	302	295	$1174.38	$190.93
93042 Interpretation and report of electrical activity of heart using 1-3 leads	120	119	$50.20	$7.14
99284 Emergency department visit with moderate level of medical decision making	118	116	$799.46	$130.63
99291 Critical care, first 30-74 minutes	110	109	$1550.40	$228.77
99213 Established patient office or other outpatient visit, typically 15 minutes	65	63	$175.00	$95.90
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	57	57	$242.00	$120.39

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	393	374	$1113.27	$193.00
93042 Interpretation and report of electrical activity of heart using 1-3 leads	150	146	$47.32	$7.28
99291 Critical care, first 30-74 minutes	126	124	$1468.05	$233.19
99284 Emergency department visit with moderate level of medical decision making	105	104	$757.62	$132.46
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	79	79	$242.00	$120.95
99213 Established patient office or other outpatient visit, typically 15 minutes	70	67	$143.06	$97.64
99283 Emergency department visit with low level of medical decision making	31	31	$400.94	$78.94

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	387	358	$1063.94	$198.93
93042 Interpretation and report of electrical activity of heart using 1-3 leads	159	156	$44.43	$7.50
99291 Critical care, first 30-74 minutes	113	111	$1412.06	$240.70
99284 Emergency department visit with moderate level of medical decision making	104	103	$728.04	$134.81
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	47	47	$242.00	$122.50
99283 Emergency department visit with low level of medical decision making	41	39	$385.10	$80.02
99213 Established patient office or other outpatient visit, typically 15 minutes	20	19	$132.00	$98.89
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	11	11	$54.00	$24.43

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	438	412	$1137.45	$192.41
99284 Emergency department visit with moderate level of medical decision making	79	77	$761.04	$132.43
99291 Critical care, first 30-74 minutes	64	63	$1386.16	$244.75
99283 Emergency department visit with low level of medical decision making	28	28	$449.00	$71.74
99213 Established patient office or other outpatient visit, typically 15 minutes	21	20	$132.00	$79.05
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	21	21	$242.00	$116.21
93042 Interpretation and report of electrical activity of heart using 1-3 leads	14	14	$42.14	$7.75
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	11	11	$207.00	$116.21

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	503	472	$1165.96	$185.60
99284 Emergency department visit with moderate level of medical decision making	140	137	$781.56	$126.09
99283 Emergency department visit with low level of medical decision making	48	48	$522.00	$66.79
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	46	46	$242.00	$115.99
99213 Established patient office or other outpatient visit, typically 15 minutes	44	42	$132.00	$78.99
99291 Critical care, first 30-74 minutes	43	43	$1424.95	$238.64
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	36	35	$207.00	$115.49

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	542	506	$1111.44	$185.81
99284 Emergency department visit with moderate level of medical decision making	162	158	$746.28	$124.81
99283 Emergency department visit with low level of medical decision making	64	59	$497.39	$66.71
99291 Critical care, first 30-74 minutes	55	54	$1353.24	$238.61
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	48	48	$242.00	$114.68
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	39	39	$207.00	$113.27
99213 Established patient office or other outpatient visit, typically 15 minutes	25	25	$132.00	$75.97
99202 New patient office or other outpatient visit, typically 20 minutes	13	13	$162.00	$79.41

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	540	518	$1060.06	$187.09
99284 Emergency department visit with moderate level of medical decision making	144	144	$710.70	$126.12
99291 Critical care, first 30-74 minutes	70	70	$1293.49	$240.34
99283 Emergency department visit with low level of medical decision making	63	63	$474.90	$66.88
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	44	44	$207.00	$112.69
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	29	29	$242.00	$115.04

Medical Specialties & State Licenses

CMS Verified: 2021-04-28

Emergency Medicine Primary Specialty

NUCC Taxonomy Code: 207P00000X

State License IL 036-065552

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

General Acute Care Hospital

NUCC Taxonomy Code: 282N00000X

State License IL 036065552

An acute general hospital is an institution whose primary function is to provide inpatient diagnostic and therapeutic services for a variety of medical conditions, both surgical and non-surgical, to a wide population group. The hospital treats patients in an acute phase of illness or injury, characterized by a single episode or a fairly short duration, from which the patient returns to his or her normal or previous level of activity.

General Acute Care Hospital

NUCC Taxonomy Code: 282N00000X

Hospital & Practice Group Affiliations

Endeavor Health Medical Group

21481 N Rand Rd, Kildeer, IL 600473061

Phone: 8476189696

Endeavor Health Medical Group

455 S Roselle Rd, Schaumburg, IL 601932971

Phone: 8479850600

Cepamerica Illinois Llp

1555 Barrington Rd, Hoffman Estates, IL 601691019

Phone: 8478432000

Endeavor Health Medical Group

199 W Rand Rd, Mount Prospect, IL 600561151

Phone: 8476185400

Endeavor Health Medical Group

21481 N Rand Rd, Kildeer, IL 600473061

Phone: 8478667846

Endeavor Health Medical Group

1450 Busch Pkwy, Buffalo Grove, IL 600894541

Phone: 8477258640

Endeavor Health Medical Group

2650 Ridge Ave, Evanston, IL 602011700

Secondary Practice Locations

21481 N Rand Rd

Kildeer, IL 600473061

Phone: 8476189500

Practice Associates & Co-Workers

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

3 Associated Practitioners

Gulbahar Asranova , FNP

Nurse Practitioner

NPI 1417672585

Family Nurse Practitioner

Dr. Michael Frumkin , MD

Emergency Medicine

NPI 1598785263

Doctor of Medicine (M.D.)

Dr. Pankaj Chhangani , MD

Pediatrics - Neonatal-Perinatal Medicine

NPI 1952364838

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

14 Historical Events

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 28, 2021

Emergency Medicine (License #036-065552 in IL)

📍

Updated Business Mailing Address March 05, 2020

Registered at 21481 N RAND RD, KILDEER, IL 600473061 (Tel: 8476189500)

🎓

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

General Acute Care Hospital

✅

NPI Profile Active July 21, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location July 21, 2017

Registered at 1555 BARRINGTON RD, HOFFMAN ESTATES, IL 601691019 (Tel: 8474906930)

📍

Updated Business Mailing Address July 21, 2017

Registered at 800 W CENTRAL RD, ARLINGTON HEIGHTS, IL 600052349 (Tel: (847) 618-4000)

👤

Provider Name / Credentials Updated July 21, 2017

Recorded as MARK DEMUS, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 21, 2017

Emergency Medicine (License #036-065552 in IL)

✅

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location July 08, 2007

Registered at 800 W CENTRAL RD, ARLINGTON HEIGHTS, IL 600052349 (Tel: 8476184000)

📍

Updated Business Mailing Address July 08, 2007

Registered at 800 W CENTRAL RD, ARLINGTON HEIGHTS, IL 600052349 (Tel: 8476184000)

👤

Provider Name / Credentials Updated July 08, 2007

Recorded as MARK DEMUS, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

General Acute Care Hospital

🟢

Initial NPI Registration & Enumeration July 17, 2006

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. Mark Demus. 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: 1477571479

Entity Type:

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

Enumeration Date: July 17, 2006

Last Update: April 28, 2021

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

21481 N Rand Rd

Kildeer, IL 600473061

Phone: 8476189500

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.