Active NPI 1508801093 Individual Practitioner Male Practitioner

Dr. John Friedewald , MD

Internal Medicine - Nephrology • Chicago, IL

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. John Friedewald, MD is a certified Internal Medicine - Nephrology practicing in Chicago, IL. With approximately 28 years of clinical experience since graduating from Columbia University College Of Physicians And Surgeons in 1998, Dr. Friedewald delivers high-quality medical care to the local community at 675 N SAINT CLAIR ST.

Dr. Friedewald 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 subsequent hospital care with moderate levelof medical decision making, if using time, at least, visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's, established patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

675 N Saint Clair St
Galter 17-200

Chicago, IL 606115975

Telephone 3126958900

Fax 3126959194

Associated Practice Facility / Clinic

🏢 Northwestern Laser Vision, Llc Facility NPI 1255544995

Medicare Profile & Education

Medical School

Columbia University College Of Physicians And Surgeons

Graduation Year

1998

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine - Nephrology in Chicago, IL

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

28 Yrs +2.5 yrs vs City Avg

City Avg: 25.5 Yrs

State Avg: 26.3 Yrs

Regional Practice Density

203 Specialists

Practicing in Chicago, IL (598 Statewide)

Telehealth Adoption Rate

25.1% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

66.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Friedewald (28 Years) 28 Yrs

Chicago Specialty Average (25.5 Years) 25.5 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	337	96	$217.00	$83.98
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	159	121	$88.00	$17.14
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	145	113	$238.00	$102.52
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	50	46	$507.00	$140.55
90935 Hemodialysis procedure with physician evaluation	32	17	$415.00	$74.81
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	24	22	$335.00	$153.97
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	22	15	$311.00	$126.51

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	159	68	$217.00	$84.53
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	88	82	$238.00	$102.15
36415 Insertion of needle into vein for collection of blood sample	56	17	$20.00	$7.25
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	50	47	$335.00	$143.38
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	22	21	$507.00	$139.78
99443 Telephone medical discussion with physician, 21-30 minutes	22	22	$250.00	$102.50
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	15	12	$311.00	$127.12

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	245	101	$217.00	$76.18
36415 Insertion of needle into vein for collection of blood sample	112	20	$20.00	$2.95
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	89	68	$335.00	$154.71
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	65	61	$238.00	$103.00
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	45	30	$311.00	$109.42
99221 Initial hospital inpatient care per day, typically 30 minutes	30	29	$354.00	$109.45
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	27	26	$507.00	$145.69
99443 Telephone medical discussion with physician, 21-30 minutes	25	25	$250.00	$104.97
90935 Hemodialysis procedure with physician evaluation	25	16	$415.00	$77.41
99213 Established patient office or other outpatient visit, typically 15 minutes	11	11	$191.64	$72.10

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	58	$217.15	$76.90
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	109	97	$238.00	$104.72
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	44	33	$335.00	$158.47
99443 Telephone medical discussion with physician, 21-30 minutes	36	34	$250.00	$107.67
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	25	24	$507.00	$140.35
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	18	12	$311.00	$110.39
99221 Initial hospital inpatient care per day, typically 30 minutes	12	12	$354.00	$110.01

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	362	105	$217.00	$77.21
99443 Telephone medical discussion with physician, 21-30 minutes	66	62	$250.00	$86.20
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	53	50	$507.00	$143.27
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	49	49	$245.92	$85.07
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	47	38	$335.00	$115.47
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	28	21	$311.00	$113.10
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	15	15	$222.00	$34.12
50200 Needle biopsy of kidney	15	15	$1029.00	$143.68
99221 Initial hospital inpatient care per day, typically 30 minutes	14	14	$348.00	$113.04

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	417	144	$217.35	$77.27
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	168	150	$335.00	$116.75
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	100	99	$222.00	$32.98
50200 Needle biopsy of kidney	97	96	$1029.00	$143.24
99231 Follow-up hospital inpatient care per day, typically 15 minutes	67	44	$119.00	$42.05
90935 Hemodialysis procedure with physician evaluation	66	27	$415.00	$78.54
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	65	37	$311.00	$108.54
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	64	59	$507.00	$141.20
99221 Initial hospital inpatient care per day, typically 30 minutes	41	41	$354.00	$110.74
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	28	27	$258.79	$81.42

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	256	93	$217.00	$74.86
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	212	166	$334.95	$116.00
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	95	93	$222.00	$32.12
50200 Needle biopsy of kidney	94	92	$1029.00	$138.44
90935 Hemodialysis procedure with physician evaluation	65	28	$415.00	$74.76
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	59	37	$311.00	$109.14
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	52	52	$507.00	$142.84
90945 Dialysis procedure including 1 evaluation	41	12	$446.00	$90.05
99231 Follow-up hospital inpatient care per day, typically 15 minutes	39	22	$119.00	$39.21
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	21	21	$298.05	$80.34
99221 Initial hospital inpatient care per day, typically 30 minutes	16	16	$354.00	$109.35

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	336	136	$217.00	$76.43
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	203	156	$334.90	$116.21
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	89	79	$507.00	$144.98
90935 Hemodialysis procedure with physician evaluation	86	37	$415.00	$75.44
90945 Dialysis procedure including 1 evaluation	77	17	$446.00	$90.19
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	76	56	$311.00	$110.86
50200 Needle biopsy of kidney	62	61	$1029.00	$139.81
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle	61	60	$222.00	$32.50
99231 Follow-up hospital inpatient care per day, typically 15 minutes	32	23	$119.00	$41.95
99221 Initial hospital inpatient care per day, typically 30 minutes	21	21	$354.00	$109.66
99226 Subsequent observation care, typically 35 minutes per day	18	17	$312.00	$111.26
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	13	13	$635.00	$215.95
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	11	11	$238.00	$83.26

Medical Specialties & State Licenses

Internal Medicine - Nephrology Primary Specialty

NUCC Taxonomy Code: 207RN0300X

State License IL 036113031

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

036113031 (IL)

Hospital & Practice Group Affiliations

Northwestern Medical Faculty Foundation

2900 Foxfield Rd, St Charles, IL 601745799

Phone: 6303776500

Northwestern Medical Faculty Foundation

636 Raymond Dr, Naperville, IL 605639789

Phone: 6304162300

Northwestern Medical Faculty Foundation

4732 N Lincoln Ave, Chicago, IL 606258561

Phone: 3129266000

Northwestern Medical Faculty Foundation

235 S Gary Ave, Bloomingdale, IL 601082213

Phone: 6308939600

Northwestern Medical Faculty Foundation

660 N Westmoreland Rd, Lake Forest, IL 600451673

Phone: 3129266146

Northwestern Medical Faculty Foundation

4445 W Irving Park Rd, Chicago, IL 606412808

Northwestern Medical Faculty Foundation

7 Blanchard Cir, Wheaton, IL 601892038

Phone: 6306820500

Northwestern Medical Faculty Foundation

250 E Superior St, Chicago, IL 606112914

Northwestern Medical Faculty Foundation

251 E Huron, Chicago, IL 606112908

Northwestern Medical Faculty Foundation

676 N Saint Clair, Chicago, IL 606112927

Northwestern Medical Faculty Foundation

885 Roosevelt Rd, Glen Ellyn, IL 601376141

Northwestern Medical Faculty Foundation

251 E Huron St, Chicago, IL 606112908

Northwestern Medical Faculty Foundation

250 E Superior, Chicago, IL 606112914

Phone: 3124723660

Northwestern Medical Faculty Foundation

4732 N Lincoln Ave, Chicago, IL 606258561

Phone: 8474752273

Northwestern Medical Faculty Foundation

675 N Saint Clair St, Chicago, IL 606115975

Northwestern Medical Faculty Foundation

635 N Dearborn St, Chicago, IL 606544618

Phone: 3129260404

Northwestern Medical Faculty Foundation

676 N Saint Clair St, Chicago, IL 606112927

Northwestern Medical Faculty Foundation

1333 W Belmont Ave, Chicago, IL 606575785

Northwestern Medical Faculty Foundation

675 N St Clair, Chicago, IL 606115975

Northwestern Medical Faculty Foundation

233 S Gary Ave, Bloomingdale, IL 601082213

Phone: 6303584414

Practice Associates & Co-Workers

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

39 Associated Practitioners

Dr. Maria Safar Boueri , MD

Internal Medicine - Nephrology

NPI 1003339482

Doctor of Medicine (M.D.)

Dr. Vinayak Rohan , MD

Transplant Surgery

NPI 1033497094

Doctor of Medicine (M.D.)

Sarah Anderson , NP

Nurse Practitioner

NPI 1043243355

Nurse Practitioner

Sarah Plaskett , PA

Physician Assistant - Surgical

NPI 1073750196

Physician Assistant

Dr. Joseph Leventhal , MD

Transplant Surgery

NPI 1124050406

Doctor of Medicine (M.D.)

Ayotunde Ositelu

Internal Medicine - Nephrology

NPI 1134610793

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active July 06, 2009

NPI status registered as active in NPPES database

📍

Updated Practice Location July 06, 2009

Registered at 675 N SAINT CLAIR ST, GALTER 17-200, CHICAGO, IL 606115975 (Tel: 3126958900)

📍

Updated Business Mailing Address July 06, 2009

Registered at 680 N LAKE SHORE DR, SUITE 1000, CHICAGO, IL 606114546 (Tel: 3126958900)

👤

Provider Name / Credentials Updated July 06, 2009

Recorded as JOHN FRIEDEWALD, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 06, 2009

Internal Medicine (License #036113031 in IL)

🟢

Initial NPI Registration & Enumeration June 18, 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: 1508801093

Entity Type:

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

Enumeration Date: June 18, 2006

Last Update: July 06, 2009

Sole Proprietor: No

Update or Correct Profile

Mailing Address

680 N Lake Shore Dr, Suite 1000

Chicago, IL 606114546

Phone: 3126958900

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.