Active NPI 1821028150 Individual Practitioner Male Practitioner

Dr. John Flaherty , MD

Internal Medicine - Infectious Disease • Chicago, IL

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. John Flaherty, MD is a certified Internal Medicine - Infectious Disease practicing in Chicago, IL. With approximately 43 years of clinical experience since completing medical education in 1983, Dr. Flaherty delivers high-quality medical care to the local community at 676 N SAINT CLAIR ST.

Dr. Flaherty is affiliated with Northwestern Medical Faculty Foundation and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include established patient outpatient office visit, 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. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

676 N Saint Clair St
Suite 940

Chicago, IL 606112927

Telephone 3129268358

Fax 3129269630

Associated Practice Facility / Clinic

🏢 Orthopedic Associates Of Chicago Facility NPI 1376515866

Medicare Profile & Education

Medical School

Other

Graduation Year

1983

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine - Infectious Disease in Chicago, IL

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

43 Yrs +21.4 yrs vs City Avg

City Avg: 21.6 Yrs

State Avg: 26.6 Yrs

Regional Practice Density

223 Specialists

Practicing in Chicago, IL (479 Statewide)

Telehealth Adoption Rate

30.5% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

63.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Flaherty (43 Years) 43 Yrs

Chicago Specialty Average (21.6 Years) 21.6 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
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	78	58	$238.00	$102.30
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	69	47	$217.00	$83.90
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	63	63	$507.00	$140.09
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	17	17	$335.00	$153.80

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	88	61	$238.00	$102.29
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	83	49	$217.00	$84.23
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	58	56	$502.50	$139.79
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	31	26	$335.00	$152.31
99442 Telephone medical discussion with physician, 11-20 minutes	20	16	$175.00	$70.43
99213 Established patient office or other outpatient visit, typically 15 minutes	16	14	$187.00	$70.44
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	16	13	$311.00	$127.10
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	14	13	$96.00	$38.10
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	12	11	$635.00	$185.18

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	156	93	$218.38	$75.56
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	74	54	$238.00	$103.95
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	62	32	$311.00	$109.25
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	36	36	$507.00	$145.35
99213 Established patient office or other outpatient visit, typically 15 minutes	21	15	$187.00	$71.87
99221 Initial hospital inpatient care per day, typically 30 minutes	19	19	$354.00	$109.36
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	16	16	$635.00	$212.56

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	117	63	$217.62	$76.31
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	67	45	$238.00	$105.19
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	28	28	$507.00	$146.21
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	22	15	$311.00	$106.83
99442 Telephone medical discussion with physician, 11-20 minutes	20	17	$175.00	$73.54
99213 Established patient office or other outpatient visit, typically 15 minutes	18	15	$187.00	$70.72
99221 Initial hospital inpatient care per day, typically 30 minutes	15	15	$354.00	$110.00
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$418.67	$148.06

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	197	102	$217.61	$77.97
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	60	40	$311.00	$113.19
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	53	44	$238.00	$86.01
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	39	39	$507.00	$147.43
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	25	24	$634.12	$219.98
99213 Established patient office or other outpatient visit, typically 15 minutes	18	16	$156.00	$56.30
99441 Telephone medical discussion with physician, 5-10 minutes	17	13	$100.00	$28.60
99442 Telephone medical discussion with physician, 11-20 minutes	16	15	$175.00	$56.55

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	143	80	$218.34	$78.20
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	104	76	$238.00	$84.44
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	66	65	$507.00	$147.96
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	37	24	$311.00	$111.67
99213 Established patient office or other outpatient visit, typically 15 minutes	37	31	$156.00	$54.30
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	16	14	$335.00	$119.33

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	137	78	$217.70	$74.15
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	108	73	$238.00	$80.74
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	67	66	$507.00	$140.49
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	31	19	$311.00	$104.58
99213 Established patient office or other outpatient visit, typically 15 minutes	30	25	$156.00	$53.04
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	12	11	$335.00	$114.42

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	315	146	$217.13	$75.77
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	97	92	$505.21	$144.45
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	73	44	$238.00	$83.32
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	63	36	$311.00	$109.63
99213 Established patient office or other outpatient visit, typically 15 minutes	31	27	$156.00	$54.21
99221 Initial hospital inpatient care per day, typically 30 minutes	28	28	$346.50	$109.66
99225 Subsequent observation care, typically 25 minutes per day	15	12	$217.00	$77.25
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	12	12	$635.00	$215.95
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$501.00	$128.58

Medical Specialties & State Licenses

Internal Medicine - Infectious Disease Primary Specialty

NUCC Taxonomy Code: 207RI0200X

State License IL 036073534

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

Hospital & Practice Group Affiliations

Northwestern Medical Faculty Foundation

1333 W Belmont Ave, Chicago, IL 606575785

Northwestern Medical Faculty Foundation

676 N Saint Clair St, Chicago, IL 606112927

Northwestern Medical Faculty Foundation

675 N St Clair, Chicago, IL 606115975

Northwestern Medical Faculty Foundation

675 N Saint Clair St, Chicago, IL 606115975

Northwestern Medical Faculty Foundation

676 N Saint Clair, Chicago, IL 606112927

Practice Associates & Co-Workers

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

23 Associated Practitioners

Dr. Phillip Santoiemma , MD

Internal Medicine - Infectious Disease

NPI 1013301126

Doctor of Medicine (M.D.)

Dr. Joshua Craft , MD

Internal Medicine - Infectious Disease

NPI 1023514791

Doctor of Medicine (M.D.)

Dustin Marley , PA-C

Physician Assistant

NPI 1114335353

Physician Assistant (Certified)

Dr. Alexis Guenette , DO

Internal Medicine - Infectious Disease

NPI 1184979700

Doctor of Osteopathic Medicine (D.O.)

Dr. Michael Angarone , DO

Internal Medicine - Infectious Disease

NPI 1194806190

Doctor of Osteopathic Medicine (D.O.)

Dr. Sudhir Penugonda , MD

Internal Medicine - Infectious Disease

NPI 1215105812

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active October 02, 2014

NPI status registered as active in NPPES database

📍

Updated Practice Location October 02, 2014

Registered at 676 N SAINT CLAIR ST, SUITE 940, CHICAGO, IL 606112927 (Tel: 3129268358)

📍

Updated Business Mailing Address October 02, 2014

Registered at 680 N LAKE SHORE DR, SUITE 1000, CHICAGO, IL 606114546 (Tel: 3129268358)

👤

Provider Name / Credentials Updated October 02, 2014

Recorded as JOHN FLAHERTY, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) October 02, 2014

Internal Medicine (License #036073534 in IL)

🟢

Initial NPI Registration & Enumeration July 03, 2006

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: 1821028150

Entity Type:

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

Enumeration Date: July 03, 2006

Last Update: October 02, 2014

Sole Proprietor: No

Update or Correct Profile

Mailing Address

680 N Lake Shore Dr, Suite 1000

Chicago, IL 606114546

Phone: 3129268358

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.