Dr. Jun Lei , MD
Internal Medicine • Flushing, NY
13329 41st Rd Ste 1b
Flushing, NY 113553671
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 December 28, 2008; this date does not establish years in practice.
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Published CMS data list 74 Original Medicare Part B services in 2023.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2023. Published rows only; this is not a quality measure.
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Published Part B service records, 2023:
- 99443 — Telephone medical discussion with physician: 43 service units.
- 99213 — Established patient outpatient office visit: 31 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2023. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2022 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2023). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Published CMS data list 109 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:
- Zolpidem Tartrate — 59 prescription fills, including refills.
- Gabapentin — 29 prescription fills, including refills.
- Clonazepam — 21 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 the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 80% of clinicians listed under Internal Medicine in Flushing, NY (2024, 181 clinicians with data). Median for this group: 3,662. Middle half: 309 to 9,615.
Fewer Part D prescriptions than 75% of clinicians listed under Internal Medicine in New York (2024, 7,161 clinicians with data). Median for this group: 1,354. Middle half: 150 to 4,728.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 261 in 2019 to 74 in 2023.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2019–2023.
Practice Location & Contact Primary Location
13329 41st Rd Ste 1b
Flushing, NY 113553671
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
1986
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
23 people with Original Medicare in 2023
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2023.
Medicare-allowed amount
About $9,561 in 2023
The total amount Medicare approved for these services in 2023. 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, 2023.
Paid by Medicare
About $5,827 in 2023
The part of the Medicare-allowed amount that Medicare itself paid in 2023, 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, 2023.
30-day fills
118 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
$736 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.
Open Payments general payments, program year 2025
All general payments: $364.90 across 11 records.
By nature of payment
- Food and Beverage: $364.90 across 11 records.
Reporting-company totals (3 largest of 6)
- Globus Medical, Inc.: $165.85 across 1 record.
- ABBVIE INC.: $56.56 across 2 records.
- Amgen Inc.: $46.52 across 3 records.
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
40 years (graduated 1986)
CMS Doctors and Clinicians data list 1986 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, CMS release of October 2, 2026.
NPI first issued
2008
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, CMS release of October 2, 2026; Medicare.gov, “Does your provider accept Medicare as full payment?”
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Lei 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. Lei 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 Flushing and New York
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 80% of clinicians listed under Internal Medicine in Flushing, NY (2024, 181 clinicians with data). Median for this group: 3,662. Middle half: 309 to 9,615.
Fewer Part D prescriptions than 75% of clinicians listed under Internal Medicine in New York (2024, 7,161 clinicians with data). Median for this group: 1,354. Middle half: 150 to 4,728.
Part D drug cost
A lower Part D drug cost than 85% of clinicians listed under Internal Medicine in Flushing, NY (2024, 181 clinicians with data). Median for this group: $410,151. Middle half: $18,404 to $1,189,911.
A lower Part D drug cost than 85% of clinicians listed under Internal Medicine in New York (2024, 7,161 clinicians with data). Median for this group: $118,708. Middle half: $9,131 to $469,610.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Lei are from 2023.
245 active clinicians are listed under Internal Medicine with a practice address in Flushing, NY (12,222 in New York).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Flushing
22% of these 245 clinicians have the CMS telehealth indicator.
61.6% of these 245 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 72% from 261 in 2019 to 74 in 2023.
- 2019: 261
- 2020: 293
- 2021: 284
- 2022: 209
- 2023: 74
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Medicare-allowed amount
Medicare-allowed amount decreased 45% from $17,431 in 2019 to $9,561 in 2023.
- 2019: $17,431
- 2020: $25,530
- 2021: $31,025
- 2022: $25,456
- 2023: $9,561
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Paid by Medicare
Paid by Medicare decreased 53% from $12,450 in 2019 to $5,827 in 2023.
- 2019: $12,450
- 2020: $17,441
- 2021: $20,900
- 2022: $16,050
- 2023: $5,827
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 97% from 3,598 in 2020 to 109 in 2024.
- 2020: 3,598
- 2021: 1,234
- 2022: 164
- 2023: 193
- 2024: 109
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30-day fills
30-day fills decreased 97% from 3,793 in 2020 to 118 in 2024.
- 2020: 3,793
- 2021: 1,288
- 2022: 188
- 2023: 225
- 2024: 118
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Part D drug cost
Part D drug cost decreased 100% from $297,840 in 2020 to $736 in 2024.
- 2020: $297,840
- 2021: $109,986
- 2022: $11,156
- 2023: $13,371
- 2024: $736
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $544.06 in 2021 to $364.90 in 2025.
- 2021: $544.06
- 2022: $538.40
- 2023: $217.39
- 2024: $441.79
- 2025: $364.90
Sources: CMS Medicare Physician & Other Practitioners (2023), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS release of October 2, 2026, 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 2025 (payments made January 1 – December 31, 2025): 11 records totaling $364.90.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Globus Medical, Inc. |
Food and Beverage
Cash or cash equivalent
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Senza | General | $165.85 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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QULIPTA | General | $29.36 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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QULIPTA | General | $27.20 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $20.06 |
| Amneal Pharmaceuticals LLC |
Food and Beverage
In-kind items and services
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UNITHROID | General | $19.71 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $19.17 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $18.61 |
| Amneal Pharmaceuticals LLC |
Food and Beverage
In-kind items and services
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UNITHROID | General | $18.42 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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OTEZLA | General | $16.46 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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OTEZLA | General | $15.96 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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OTEZLA | General | $14.10 |
Source: CMS Open Payments, program year 2025, 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 2016–2022 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, 2017–2023; 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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99443
Telephone medical discussion with physician, 21-30 minutes
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43 | 15 | $220.00 | $146.76 |
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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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31 | 15 | $240.00 | $104.84 |
Source: CMS Part B by Provider and Service, 2023; 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 |
|---|---|---|---|---|---|
| Zolpidem Tartrate | Zolpidem Tartrate | 59 | 1,695 | $466.30 | 21 |
| Gabapentin | Gabapentin | 29 | 1,100 | $204.89 | 19 |
| Clonazepam | Clonazepam | 21 | 630 | $64.72 | — |
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
NUCC 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: 282N00000X
An acute general hospital is an institution whose primary function is to provide inpatient diagnostic and therapeutic services for a variety of medical conditions, both surgical and non-surgical, to a wide population group. The hospital treats patients in an acute phase of illness or injury, characterized by a single episode or a fairly short duration, from which the patient returns to his or her normal or previous level of activity.
NUCC Taxonomy Code: 261QA0600X
NUCC Taxonomy Code: 261QP2300X
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20100407000594
NY
9739215393
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
General Acute Care Hospital (license number reported to NPPES: NY 250716)
NPI status registered as active in NPPES database
Registered at 13329 41ST RD STE 1B, FLUSHING, NY 113553671 (Tel: (347) 732-0368)
Registered at 13329 41ST RD STE 1B, FLUSHING, NY 113553671 (Tel: (347) 732-0368)
Recorded as JUN LEI, M.D.
Internal Medicine (license number reported to NPPES: NY 250716)
NPI status registered as active in NPPES database
Registered at 40 WALL ST, AMSTERDAM, NY 120104309 (Tel: 5189543167)
Registered at 8205 255TH ST, GLEN OAKS, NY 110041410 (Tel: 3474213665)
Recorded as JUN LEI, M.D.
Clinic/Center (license number reported to NPPES: NY 250716)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Flushing
- Sara Israel
- Dr. Basem Ali, MD
- Dr. Tien-Tsai Tsai, MD
- Dr. Antonin Reznicek, MD
- Dr. Ida Bronfman, MD
- Dr. Woong Paik, MD
Mailing Address
13329 41st Rd Ste 1b
Flushing, NY 113553671
Phone: 3477320368