Active NPI 1104169994 Individual Practitioner Male Practitioner

Dr. Robert Jen , MD

Internal Medicine • Oak Lawn, IL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Robert Jen, MD is a certified Internal Medicine practicing in Oak Lawn, IL. With approximately 13 years of clinical experience since graduating from University Of Cincinnati College Of Medicine in 2013, Dr. Jen delivers high-quality medical care to the local community at 4440 W 95TH ST.

Dr. Jen is affiliated with Advocate Health And Hospitals Corporation 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, initial hospital care with moderate level of 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

4440 W 95th St

Oak Lawn, IL 604532600

Telephone 7086848000

Associated Practice Facility / Clinic

🏢 Midwest Pediatric Cardiology, P.c. Facility NPI 1962483669

Medicare Profile & Education

Medical School

University Of Cincinnati College Of Medicine

Graduation Year

2013

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Oak Lawn, IL

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

13 Yrs -5.3 yrs vs City Avg

City Avg: 18.3 Yrs

State Avg: 28.9 Yrs

Regional Practice Density

174 Specialists

Practicing in Oak Lawn, IL (7544 Statewide)

Telehealth Adoption Rate

9.8% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

57.6% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Jen (13 Years) 13 Yrs

Oak Lawn Specialty Average (18.3 Years) 18.3 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	511	119	$261.00	$121.09
99239 Hospital discharge day management, more than 30 minutes	53	52	$254.00	$117.33
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	49	48	$459.00	$174.38

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	558	156	$248.00	$124.38
99239 Hospital discharge day management, more than 30 minutes	89	89	$241.00	$118.87
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	71	71	$437.00	$179.29
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	38	27	$168.00	$81.03

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	478	130	$241.00	$105.17
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	81	37	$168.00	$69.73
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	60	59	$437.00	$202.57
99239 Hospital discharge day management, more than 30 minutes	58	58	$241.00	$104.29
99220 Hospital observation care, typically 70 minutes	16	16	$400.00	$187.69

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	537	139	$241.00	$107.39
99239 Hospital discharge day management, more than 30 minutes	71	70	$241.00	$112.67
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	59	33	$168.00	$76.33
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	57	56	$437.00	$205.64

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	541	167	$241.00	$110.08
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	110	104	$437.00	$217.32
99239 Hospital discharge day management, more than 30 minutes	82	79	$241.00	$112.96
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	78	25	$168.00	$71.43
99217 Hospital observation care on day of discharge	11	11	$166.00	$63.58

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	532	155	$237.05	$109.30
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	80	21	$165.13	$77.75
99239 Hospital discharge day management, more than 30 minutes	68	67	$241.00	$113.80
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	66	64	$425.76	$212.95
99217 Hospital observation care on day of discharge	13	13	$166.00	$77.93

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	461	143	$227.40	$110.10
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	87	33	$154.87	$77.34
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	84	82	$405.83	$215.98
99239 Hospital discharge day management, more than 30 minutes	84	81	$214.00	$113.79
99217 Hospital observation care on day of discharge	14	14	$147.93	$77.61

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	425	142	$220.00	$110.66
99239 Hospital discharge day management, more than 30 minutes	108	106	$205.00	$113.59
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	61	61	$385.00	$215.80
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	54	25	$150.00	$76.43

Medical Specialties & State Licenses

CMS Verified: 2025-10-06

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License IL 125.063485

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.

Hospital & Practice Group Affiliations

Advocate Health And Hospitals Corporation

214 Mchenry Rd, Buffalo Grove, IL 600896748

Phone: 8474591160

Advocate Health And Hospitals Corporation

4440 W 95th St, Oak Lawn, IL 604532600

Practice Associates & Co-Workers

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

40 Associated Practitioners

Dr. Mandy Enshiwat , MD

Internal Medicine

NPI 1003143231

Doctor of Medicine (M.D.)

Dr. Mihaela Mihailescu , MD

Internal Medicine - Rheumatology

NPI 1003943614

Doctor of Medicine (M.D.)

Margaret Mulvey

Nurse Practitioner

NPI 1013722206

Dr. Jamie Clementi , MD

Surgery

NPI 1023513355

Doctor of Medicine (M.D.)

Dr. Mary Therese Krueger , DPT

Physical Therapist

NPI 1033556832

Doctor of Physical Therapy

Josie Magnabosco

Registered Nurse

NPI 1043183296

Career & Practice History Timeline

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

9 Historical Events

📍

Updated Business Mailing Address October 06, 2025

Registered at 29373 NETWORK PL, CHICAGO, IL 606731293 (Tel: 8473905900)

📍

Updated Practice Location December 20, 2021

Registered at 4440 W 95TH ST, OAK LAWN, IL 604532600 (Tel: 7086848000)

📍

Updated Business Mailing Address December 20, 2021

Registered at 4440 W 95TH ST, OAK LAWN, IL 604532600

✅

NPI Profile Active June 21, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location June 21, 2013

Registered at 2160 S 1ST AVE, MAYWOOD, IL 601533328 (Tel: 7082166497)

📍

Updated Business Mailing Address June 21, 2013

Registered at 209 HOMESTEAD RD APT 2, LA GRANGE PARK, IL 605262062

👤

Provider Name / Credentials Updated June 21, 2013

Recorded as ROBERT JEN, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 21, 2013

Internal Medicine (License #125.063485 in IL)

🟢

Initial NPI Registration & Enumeration April 01, 2013

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: 1104169994

Entity Type:

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

Enumeration Date: April 01, 2013

Last Update: October 06, 2025

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

29373 Network Pl

Chicago, IL 606731293

Phone: 8473905900

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.