Dr. David Youngsik Jun , MD
Internal Medicine • Park Ridge, IL
2604 Dempster St, Suite #403
Park Ridge, IL 600688412
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 July 20, 2006; this date does not establish years in practice.
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Published CMS data list 970 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 485 service units.
- G0439 — Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit: 185 service units.
- G0008 — Administration of influenza virus vaccine: 69 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 9 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 8,935 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – 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 — 952 prescription fills, including refills.
- Metformin Hcl — 610 prescription fills, including refills.
- Losartan-Hydrochlorothiazide (Losartan/Hydrochlorothiazide) — 549 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 111 records in the table · Guide: How to read Medicare Part D prescriber data
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Close to the middle for Medicare Part B services among clinicians listed under Internal Medicine in Park Ridge, IL (2024, 59 clinicians with data). Median for this group: 889. Middle half: 497 to 1,354.
More Medicare Part B services than 60% of clinicians listed under Internal Medicine in Illinois (2024, 3,231 clinicians with data). Median for this group: 696. Middle half: 284 to 1,352.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 2,523 in 2020 to 970 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
2604 Dempster St
Suite #403
Park Ridge, IL 600688412
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Metropolitan Healthcare Partners Pllc. 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
1978
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
252 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $109,730 in 2024
The total amount Medicare approved for these services in 2024. 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 – by Provider and Service, 2024.
Paid by Medicare
About $79,054 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, 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 – by Provider and Service, 2024.
30-day fills
22,415 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
$753,597 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 – by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $17.29 in 2024
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2024.
Years since graduation
48 years (graduated 1978)
CMS Doctors and Clinicians data list 1978 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
2006
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.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
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, “Does your provider accept Medicare as full payment?”
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. Jun 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. Jun 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 Park Ridge and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Close to the middle for clinicians listed under Internal Medicine in Park Ridge, IL (2024, 59 clinicians with data). Median for this group: 889. Middle half: 497 to 1,354.
More Medicare Part B services than 60% of clinicians listed under Internal Medicine in Illinois (2024, 3,231 clinicians with data). Median for this group: 696. Middle half: 284 to 1,352.
Medicare-allowed amount
Close to the middle for clinicians listed under Internal Medicine in Park Ridge, IL (2024, 59 clinicians with data). Median for this group: $95,802. Middle half: $57,524 to $134,596.
A higher Medicare-allowed amount than 70% of clinicians listed under Internal Medicine in Illinois (2024, 3,231 clinicians with data). Median for this group: $67,573. Middle half: $27,616 to $124,710.
Paid by Medicare
Close to the middle for clinicians listed under Internal Medicine in Park Ridge, IL (2024, 59 clinicians with data). Median for this group: $75,702. Middle half: $45,363 to $108,598.
A higher Medicare payment amount than 65% of clinicians listed under Internal Medicine in Illinois (2024, 3,231 clinicians with data). Median for this group: $52,732. Middle half: $21,099 to $98,198.
Medicare Part D prescriptions
More Part D prescriptions than 90% of clinicians listed under Internal Medicine in Park Ridge, IL (2024, 64 clinicians with data). Median for this group: 143. Middle half: 45 to 3,163.
More Part D prescriptions than 85% of clinicians listed under Internal Medicine in Illinois (2024, 3,708 clinicians with data). Median for this group: 1,080. Middle half: 101 to 4,782.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Internal Medicine in Park Ridge, IL (2024, 64 clinicians with data). Median for this group: $3,554. Middle half: $358 to $211,781.
A higher Part D drug cost than 85% of clinicians listed under Internal Medicine in Illinois (2024, 3,708 clinicians with data). Median for this group: $82,134. Middle half: $2,821 to $375,574.
159 active clinicians are listed under Internal Medicine with a practice address in Park Ridge, IL (7,195 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Park Ridge
13.2% of these 159 clinicians have the CMS telehealth indicator.
35.8% of these 159 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
Medicare Part B services decreased 62% from 2,523 in 2020 to 970 in 2024.
- 2020: 2,523
- 2021: 2,758
- 2022: 2,012
- 2023: 1,194
- 2024: 970
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Medicare-allowed amount
Medicare-allowed amount decreased 25% from $145,972 in 2020 to $109,730 in 2024.
- 2020: $145,972
- 2021: $193,307
- 2022: $138,453
- 2023: $125,009
- 2024: $109,730
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Paid by Medicare
Paid by Medicare decreased 19% from $97,121 in 2020 to $79,054 in 2024.
- 2020: $97,121
- 2021: $137,304
- 2022: $93,113
- 2023: $95,105
- 2024: $79,054
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 19% from 7,516 in 2020 to 8,935 in 2024.
- 2020: 7,516
- 2021: 7,976
- 2022: 8,790
- 2023: 8,446
- 2024: 8,935
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30-day fills
30-day fills increased 25% from 17,996 in 2020 to 22,415 in 2024.
- 2020: 17,996
- 2021: 19,286
- 2022: 21,617
- 2023: 21,268
- 2024: 22,415
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Part D drug cost
Part D drug cost increased 26% from $598,074 in 2020 to $753,597 in 2024.
- 2020: $598,074
- 2021: $603,370
- 2022: $759,363
- 2023: $844,742
- 2024: $753,597
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2024 only.
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $17.29.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Amgen Inc. |
Food and Beverage
In-kind items and services
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KRYSTEXXA | General | $17.29 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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 – by Provider and Service data, 2017–2024; 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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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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485 | 221 | $347.40 | $132.43 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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185 | 185 | $238.02 | $133.39 |
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G0008
Administration of influenza virus vaccine
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69 | 68 | $63.00 | $33.70 |
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90662
Influenza vaccine split virus, preservative free
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68 | 67 | $120.00 | $81.24 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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64 | 55 | $234.00 | $94.09 |
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93000
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
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50 | 47 | $108.00 | $14.95 |
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G0009
Administration of pneumococcal vaccine
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23 | 23 | $63.00 | $33.70 |
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90732
Pneumococcal vaccine, 23-valent
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13 | 13 | $220.00 | $130.80 |
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99496
Transitional care management services for problem of high complexity
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13 | 11 | $491.17 | $286.95 |
Source: CMS Part B by Provider and Service, 2024; 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 | 952 | 81,695 | $7,267.91 | 314 |
| Metformin Hcl | Metformin Hcl | 610 | 51,750 | $4,561.71 | 186 |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 549 | 45,749 | $7,556.86 | 160 |
| Losartan Potassium | Losartan Potassium | 543 | 43,977 | $4,793.65 | 167 |
| Amlodipine Besylate | Amlodipine Besylate | 501 | 41,990 | $3,472.32 | 152 |
| Tamsulosin Hcl | Tamsulosin Hcl | 364 | 31,205 | $4,834.93 | 120 |
| Omeprazole | Omeprazole | 303 | 23,317 | $3,153.70 | 123 |
| Metoprolol Succinate | Metoprolol Succinate | 298 | 24,046 | $3,792.67 | 82 |
| Jardiance | Empagliflozin | 242 | 13,210 | $255,606.71 | 58 |
| Alendronate Sodium | Alendronate Sodium | 233 | 17,520 | $1,877.48 | 81 |
| Levothyroxine Sodium | Levothyroxine Sodium | 194 | 16,516 | $1,888.33 | 57 |
| Lisinopril | Lisinopril | 153 | 13,708 | $1,023.81 | 51 |
| Simvastatin | Simvastatin | 148 | 13,060 | $1,016.64 | 42 |
| Baclofen | Baclofen | 148 | 3,620 | $514.22 | 96 |
| Famotidine | Famotidine | 136 | 9,750 | $1,195.94 | 49 |
| Hydrochlorothiazide | Hydrochlorothiazide | 123 | 10,350 | $635.50 | 36 |
| Hydrocortisone | Hydrocortisone | 123 | 2,856 | $849.49 | 91 |
| Pioglitazone Hcl | Pioglitazone Hcl | 115 | 9,652 | $1,106.09 | 43 |
| Finasteride | Finasteride | 111 | 9,352 | $1,389.45 | 33 |
| Metformin Hcl Er | Metformin Hcl | 111 | 8,340 | $422.93 | 39 |
| Lovastatin | Lovastatin | 106 | 9,330 | $650.28 | 31 |
| Fluticasone Propionate | Fluticasone Propionate | 95 | 5,610 | $1,164.29 | 43 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 88 | 7,620 | $2,105.55 | 32 |
| Glipizide Er | Glipizide | 84 | 6,930 | $749.50 | 24 |
| Clopidogrel | Clopidogrel Bisulfate | 83 | 6,600 | $971.58 | 23 |
(top 25 shown)
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: 2021-12-09NUCC 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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20031209000579
IL
1052217239
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
Metropolitan Healthcare Partners Pllc
3445 N Central Ave, Chicago, IL 606344420
Phone: 7732050800
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Psychologist
Doctor of Philosophy (Ph.D.)
Social Worker - Clinical
Licensed Clinical Social Worker
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Social Worker - Clinical
Licensed Clinical Social Worker
Chiropractor
Doctor of Chiropractic
Social Worker - Clinical
Master of Social Work, Licensed Clinical Social Worker
Career & Practice History
NPI enumerated July 20, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to November 2026.
NPI Administrative Meta
Other Internal Medicine Providers in Park Ridge
- Dr. Beau Brinckerhoff, MD
- Dr. Robert Zimmanck, MD
- Dr. Voula Asimacopoulos, MD
- Dr. Minyong Yu, DO
- Dr. Shantesh Nalawadi, MD
- Dr. Davel Patel, DO
Mailing Address
2604 Dempster St, Suite #403
Park Ridge, IL 600688412
Phone: 8476275206