Dr. John Junhaeng Lee , MD
Internal Medicine โข Springfield, IL
751 N Rutledge St Ste 1100
Springfield, IL 627024968
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on May 21, 2009; this date does not establish years in practice.
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Published CMS data list 206 Original Medicare Part B services in 2019.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2019. Published rows only; this is not a quality measure.
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Published Part B service records, 2019:
- 99222 โ Initial hospital care with straightforward or low-level medical decision making: 103 service units.
- 99223 โ Initial hospital care with moderate level of medical decision making: 58 service units.
- 99219 โ Hospital observation care: 45 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2019. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2018 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2019). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 462 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium โ 45 prescription fills, including refills.
- Omeprazole โ 38 prescription fills, including refills.
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) โ 33 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 22 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Close to the middle for Part D prescriptions among clinicians listed under Internal Medicine in Springfield, IL (2024, 85 clinicians with data). Median for this group: 342. Middle half: 80 to 2,561.
Close to the middle for Part D prescriptions among clinicians listed under Internal Medicine in Illinois (2024, 3,755 clinicians with data). Median for this group: 1,030. Middle half: 99 to 4,658.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 14 in 2014 to 462 in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2014โ2024.
Practice Location & Contact Primary Location
751 N Rutledge St Ste 1100
Springfield, IL 627024968
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Oak Lawn, IL. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Board Of Trustees Of Southern Illinois University. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2009
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $33,255 in 2019
The total amount Medicare approved for these services in 2019. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2019.
Paid by Medicare
About $26,229 in 2019
The part of the Medicare-allowed amount that Medicare itself paid in 2019, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2019.
30-day fills
905 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$6,297 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $180.00 across 3 records.
By nature of payment
- Food and Beverage: $180.00 across 3 records.
Reporting-company totals
- Biosense Webster, Inc.: $140.20 across 1 record.
- AstraZeneca Pharmaceuticals LP: $21.60 across 1 record.
- Janssen Pharmaceuticals, Inc: $18.20 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
17 years (graduated 2009)
CMS Doctors and Clinicians data list 2009 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2009
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Lee has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Lee as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Springfield and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Internal Medicine in Springfield, IL (2024, 85 clinicians with data). Median for this group: 342. Middle half: 80 to 2,561.
Close to the middle for clinicians listed under Internal Medicine in Illinois (2024, 3,755 clinicians with data). Median for this group: 1,030. Middle half: 99 to 4,658.
Part D drug cost
A lower Part D drug cost than 60% of clinicians listed under Internal Medicine in Springfield, IL (2024, 85 clinicians with data). Median for this group: $10,337. Middle half: $678 to $312,248.
A lower Part D drug cost than 70% of clinicians listed under Internal Medicine in Illinois (2024, 3,755 clinicians with data). Median for this group: $78,716. Middle half: $2,604 to $371,507.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Lee are from 2019.
196 active clinicians are listed under Internal Medicine with a practice address in Springfield, IL (7,245 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Springfield
5.1% of these 196 clinicians have the CMS telehealth indicator.
38.8% of these 196 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
CMS data for Medicare Part B services are available for 2019 only.
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Medicare-allowed amount
CMS data for Medicare-allowed amount are available for 2019 only.
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Paid by Medicare
CMS data for Medicare payment amount are available for 2019 only.
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 14 in 2014 to 462 in 2024.
- 2014: 14
- 2020: 25
- 2021: 121
- 2024: 462
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30-day fills
30-day fills went from 14 in 2014 to 905 in 2024.
- 2014: 14
- 2020: 61
- 2021: 361
- 2024: 905
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Part D drug cost
Part D drug cost went from $77 in 2014 to $6,297 in 2024.
- 2014: $77
- 2020: $202
- 2021: $1,253
- 2024: $6,297
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $17.24 in 2020 to $180.00 in 2025.
- 2020: $17.24
- 2021: $96.29
- 2022: $760.27
- 2023: $48.21
- 2025: $180.00
Sources: CMS Medicare Physician & Other Practitioners (2019), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): fewer than 11 records totaling $180.00.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Biosense Webster, Inc. |
Food and Beverage
In-kind items and services
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CARTO 3 | General | $140.20 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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AIRSUPRA | General | $21.60 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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SPRAVATO | General | $18.20 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2018 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2019; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
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103 | 98 | $297.00 | $141.32 |
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99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
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58 | 57 | $430.00 | $211.91 |
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99219
Hospital observation care, typically 50 minutes
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45 | 45 | $252.00 | $142.41 |
Source: CMS Part B by Provider and Service, 2019; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 45 | 3,810 | $230.24 | 33 |
| Omeprazole | Omeprazole | 38 | 2,019 | $269.21 | 15 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 33 | 868 | $1,255.15 | 16 |
| Metoprolol Succinate | Metoprolol Succinate | 33 | 2,045 | $265.71 | 18 |
| Gabapentin | Gabapentin | 30 | 1,380 | $719.80 | 16 |
| Tramadol Hcl | Tramadol Hcl | 26 | 795 | $675.23 | 11 |
| Amlodipine Besylate | Amlodipine Besylate | 26 | 2,216 | $132.17 | 18 |
| Levothyroxine Sodium | Levothyroxine Sodium | 25 | 2,190 | $104.28 | 16 |
| Lisinopril | Lisinopril | 24 | 2,160 | $64.97 | 15 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 23 | 756 | $721.86 | 14 |
| Finasteride | Finasteride | 15 | 1,274 | $213.20 | โ |
| Furosemide | Furosemide | 15 | 907 | $51.12 | โ |
| Pantoprazole Sodium | Pantoprazole Sodium | 15 | 866 | $162.55 | 11 |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 14 | 780 | $116.74 | โ |
| Morphine Sulfate Er | Morphine Sulfate | 14 | 331 | $390.96 | โ |
| Sertraline Hcl | Sertraline Hcl | 13 | 706 | $67.14 | โ |
| Metformin Hcl | Metformin Hcl | 13 | 864 | $23.53 | โ |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 13 | 750 | $155.61 | โ |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 12 | 327 | $518.87 | โ |
| Lorazepam | Lorazepam | 12 | 337 | $52.24 | โ |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 12 | 770 | $53.38 | โ |
| Trazodone Hcl | Trazodone Hcl | 11 | 430 | $52.57 | โ |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2024-01-25NUCC Taxonomy Code: 207R00000X
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.
NUCC Taxonomy Code: 208M00000X
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.
NUCC Taxonomy Code: 208M00000X
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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20190318001580
IL
0547417081
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Board Of Trustees Of Southern Illinois University
751 N Rutledge St, Springfield, IL 627024968
Phone: 2175458000
Board Of Trustees Of Southern Illinois University
751 N Rutledge St, Springfield, IL 627024968
Phone: 2175458000
Secondary Practice Locations
4440 W 95th St, #131-No
Oak Lawn, IL 604532600
Phone: 7086845673
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Family Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Internal Medicine - Cardiovascular Disease
Doctor of Medicine (M.D.)
Internal Medicine - Cardiovascular Disease
Doctor of Medicine (M.D.), Master of Public Health
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Family Nurse Practitioner (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 751 N RUTLEDGE ST STE 1100, SPRINGFIELD, IL 627024968 (Tel: 2175458000)
Registered at PO BOX 196398, SPRINGFIELD, IL 62794 (Tel: 2175458000)
Hospitalist (license number reported to NPPES: IN 01073611)
NPI status registered as active in NPPES database
Registered at 4440 W 95TH ST, #131-NO, OAK LAWN, IL 604532600 (Tel: 7086845673)
Registered at 4440 W 95TH ST, #131-NO, OAK LAWN, IL 604532600 (Tel: 7086845673)
Recorded as JOHN LEE, M.D.
Hospitalist (license number reported to NPPES: IN 01073611)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Springfield
- Dr. Amir Oduche, MD
- Dr. Helen Kwong, MD
- Dr. Mulham Alom, MD
- Dr. Tasnem Alsebai, MBBS
- Dr. Edgard Cumpa, MD
- Dr. Craig Backs, MD
Mailing Address
Po Box 196398
Springfield, IL 62794
Phone: 2175458000