Dr. John Ken Lee , DO
Anesthesiology โข Barrington, IL
450 W Highway 22
Barrington, IL 600107509
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 18, 2005; this date does not establish years in practice.
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Published CMS data list 209 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 00731 โ Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope: 38 service units.
- 36620 โ Insertion of artery tube for blood sampling or infusion through skin: 28 service units.
- 00811 โ Anesthesia for other procedure on large bowel using an endoscope: 27 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ 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 ยท Guide: How to read Medicare Part B data
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Published CMS data list 12 Medicare Part D prescriptions, including refills, in 2020.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2020. Published rows only; this is not a quality measure.
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Published Part D records, 2020:
- Sertraline Hcl โ 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2020. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 85% of clinicians listed under Anesthesiology in Barrington, IL (2024, 15 clinicians with data). Median for this group: 180. Middle half: 98 to 207.
More Medicare Part B services than 75% of clinicians listed under Anesthesiology in Illinois (2024, 1,277 clinicians with data). Median for this group: 111. Middle half: 49 to 202.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 288 in 2020 to 209 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
450 W Highway 22
Barrington, IL 600107509
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: Barrington Anesthesia Associates, Sc. 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
2001
What Public CMS Data Show
Anesthesiology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
276 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 โ by Provider, 2024.
Medicare-allowed amount
About $33,739 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 โ by Provider and Service, 2024.
Paid by Medicare
About $27,451 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 โ by Provider and Service, 2024.
30-day fills
12 standardized 30-day fills in 2020
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
$166 in 2020
The total cost of these prescriptions in 2020, 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, 2020.
Open Payments general payments, program year 2025
All general payments: $179.54 across 3 records.
By nature of payment
- Food and Beverage: $179.54 across 3 records.
Reporting-company totals
- VERTEX PHARMACEUTICALS INCORPORATED: $123.73 across 1 record.
- Merck Sharp & Dohme LLC: $31.70 across 1 record.
- Pacira Pharmaceuticals Incorporated: $24.11 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
25 years (graduated 2001)
CMS Doctors and Clinicians data list 2001 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
2005
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 Barrington and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 85% of clinicians listed under Anesthesiology in Barrington, IL (2024, 15 clinicians with data). Median for this group: 180. Middle half: 98 to 207.
More Medicare Part B services than 75% of clinicians listed under Anesthesiology in Illinois (2024, 1,277 clinicians with data). Median for this group: 111. Middle half: 49 to 202.
Medicare-allowed amount
A higher Medicare-allowed amount than 75% of clinicians listed under Anesthesiology in Barrington, IL (2024, 15 clinicians with data). Median for this group: $28,550. Middle half: $10,016 to $33,670.
A higher Medicare-allowed amount than 80% of clinicians listed under Anesthesiology in Illinois (2024, 1,277 clinicians with data). Median for this group: $13,888. Middle half: $5,137 to $26,211.
Paid by Medicare
A higher Medicare payment amount than 75% of clinicians listed under Anesthesiology in Barrington, IL (2024, 15 clinicians with data). Median for this group: $22,596. Middle half: $8,021 to $27,243.
A higher Medicare payment amount than 85% of clinicians listed under Anesthesiology in Illinois (2024, 1,277 clinicians with data). Median for this group: $11,048. Middle half: $4,093 to $21,014.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Lee are from 2020.
21 active clinicians are listed under Anesthesiology with a practice address in Barrington, IL (2,577 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Barrington
0% of these 21 clinicians have the CMS telehealth indicator.
76.2% of these 21 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 27% from 288 in 2020 to 209 in 2024.
- 2020: 288
- 2021: 304
- 2022: 274
- 2023: 263
- 2024: 209
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Medicare-allowed amount
Medicare-allowed amount decreased 40% from $56,488 in 2020 to $33,739 in 2024.
- 2020: $56,488
- 2021: $49,548
- 2022: $35,879
- 2023: $39,029
- 2024: $33,739
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Paid by Medicare
Paid by Medicare decreased 40% from $45,535 in 2020 to $27,451 in 2024.
- 2020: $45,535
- 2021: $40,205
- 2022: $29,033
- 2023: $31,673
- 2024: $27,451
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 11 in 2013 to 12 in 2020.
- 2013: 11
- 2016: 11
- 2019: 60
- 2020: 12
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30-day fills
30-day fills went from 11 in 2013 to 12 in 2020.
- 2013: 11
- 2016: 11
- 2019: 61
- 2020: 12
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Part D drug cost
Part D drug cost went from $142 in 2013 to $166 in 2020.
- 2013: $142
- 2016: $97
- 2019: $2,946
- 2020: $166
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $129.15 in 2019 to $179.54 in 2025.
- 2019: $129.15
- 2020: $46.48
- 2025: $179.54
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2020), 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 $179.54.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| VERTEX PHARMACEUTICALS INCORPORATED |
Food and Beverage
In-kind items and services
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JOURNAVX | General | $123.73 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
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BRIDION | General | $31.70 |
| Pacira Pharmaceuticals Incorporated |
Food and Beverage
In-kind items and services
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Exparel | General | $24.11 |
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 2016โ2023 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, 2017โ2024; 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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00731
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope
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38 | 37 | $1350.00 | $151.13 |
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36620
Insertion of artery tube for blood sampling or infusion through skin
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28 | 28 | $518.00 | $44.62 |
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00811
Anesthesia for other procedure on large bowel using an endoscope
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27 | 27 | $1280.00 | $140.66 |
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00813
Anesthesia for procedure on small and large bowel using an endoscope
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25 | 25 | $1569.60 | $175.20 |
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00812
Anesthesia for exam of colon using an endoscope
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22 | 22 | $1080.00 | $117.65 |
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76937
Ultrasonic guidance for blood vessel access
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22 | 22 | $175.00 | $14.13 |
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00560
Anesthesia for procedure on heart and large blood vessels
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19 | 19 | $4575.79 | $530.46 |
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64447
Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve)
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15 | 14 | $1216.00 | $61.84 |
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01402
Anesthesia for procedure for total knee joint replacement
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13 | 13 | $3101.54 | $358.71 |
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 2020.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Sertraline Hcl | Sertraline Hcl | 12 | 366 | $166.08 | โ |
Source: CMS Part D by Provider and Drug, 2020; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2021-12-21NUCC Taxonomy Code: 207L00000X
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ANESTHESIOLOGY
I20050624000657
IL
8426093915
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
Barrington Anesthesia Associates, Sc
450 W Hwy 22, Barrington, IL 600101919
Phone: 8473819600
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Anesthesiology
Doctor of Medicine (M.D.)
Emergency Medicine - Emergency Medical Services
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Anesthesiology (license number reported to NPPES: IL 036113245)
NPI status registered as active in NPPES database
Registered at 450 W HIGHWAY 22, BARRINGTON, IL 600107509 (Tel: 8473819600)
Registered at 8135 N MILWAUKEE AVE, NILES, IL 607142828 (Tel: 8479678098)
Recorded as JOHN LEE, D.O.
Anesthesiology
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Anesthesiology Specialists in Barrington
- Dr. Peter Wuertz, MD
- Dr. Eric Bessonny, MD
- Dr. Bradley Schnack, MD
- Dr. Michael Fox, MD
- Dr. Danielle Cook, DO
- Dr. Lana Moy, MD
Mailing Address
8135 N Milwaukee Ave
Niles, IL 607142828
Phone: 8479678098