Dr. Thomas Keywon Lee, MD, PhD

  • Orange, CA
  • Pathologist
NPI1548314313PAC ID1456476464
Medicare services, 2024
3,622
Medicare patients, 2024
1,132
Publications
35
MIPS score, 2024
75
Hospital affiliations
2
Practice address
1140 West La Veta Ave, Suite 300, Orange, CA 92868
Practice phone
Call (949) 390-9656
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Pavilion Surgery Center

Surgery Center - Medicare-Certified · Orange, California

See all 8 affiliations

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Dr. Thomas Keywon Lee is a pathologist in Orange, California

Dr. Lee practices at Pavilion Surgery Center in Orange, California.

Dr. Lee's NPI, 1548314313, was assigned on January 22, 2007. Dr. Lee graduated from George Washington University School of Medicine and Health Sciences in 2006. Dr. Lee holds California license A106146.

NPI and contact details
Medicare PAC ID
1456476464
NPI enumeration date
January 22, 2007
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(949) 390-9656
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
46
Medical school graduation
2006

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Thomas Keywon Lee practices at Pavilion Surgery Center in Orange, California

Dr. Lee's primary practice is Pavilion Surgery Center, at 1140 West La Veta Ave, Suite 300, Orange, CA 92868. The practice phone is (949) 390-9656.

  • Pavilion Surgery Center
    1140 West La Veta Ave, Suite 300, Orange, CA 92868Phone(949) 390-9656

Source: Dmand AI Affiliation Data

Dr. Thomas Keywon Lee is affiliated with 3 sites of care and 5 medical groups

Dr. Lee's primary practice is Pavilion Surgery Center in Orange, California. Dr. Lee is also affiliated with Hoag Hospital Newport Beach. The medical group on file is UCI Health Pathology and Laboratory Services. Dmand AI also links Dr. Lee to 1 more hospital and 4 medical groups, each named with a free account.

See all 8 affiliations for Dr. Lee

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Thomas Keywon Lee's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lee practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Pavilion Surgery CenterAvailable with a free account
+2 more sites and 4 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Thomas Keywon Lee is one of 1,354 pathologists in California

Anatomic pathology and clinical pathology is Dr. Lee's primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dr. Lee is board certified in pathology - anatomic by the American Board of Pathology. Dmand AI has Dr. Lee's licenses on file in 14 states: California, New York, Maryland, Nebraska, Ohio, Arkansas, Colorado, Iowa, Kansas, Kentucky, New Jersey, Tennessee, Washington and Pennsylvania.

Specialties and state licenses

  • Anatomic pathology and clinical pathology, CaliforniaPrimaryLicense A106146 · 2008 to 2026 · taxonomy 207ZP0102X
  • New York license2021 to 2026
  • Anatomic pathology, MarylandLicense T1602 · 2014 to 2016 · taxonomy 207ZP0101X
  • Nebraska license2014 to 2016
  • Ohio license2014 to 2016
  • Arkansas license2014 to 2015
  • Colorado license2014 to 2015
  • Iowa license2014 to 2015
  • Kansas license2014 to 2015
  • Kentucky license2014 to 2015
  • New Jersey license2014 to 2015
  • Tennessee license2009 to 2015
  • Washington license2010 to 2015
  • Pennsylvania license2014

Pathologists near Dr. Lee

Counts of pathologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Thomas Keywon Lee billed Medicare for 3,622 services in 2024

CMS data shows 3,622 Medicare services from Dr. Lee across 20 procedure codes in 2024, for 1,132 Medicare patients. Medicare paid $137,728 for them.

Medicare services, 20243,622
Medicare patients1,132
Paid by Medicare$137,728
Procedure codes20

Dr. Lee's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Lab and pathology
2023: 3,2822024: 3,5889%
Other services
2023: 422024: 3419%

Where Dr. Lee's Medicare services took place, 2024

  • In an office35010%
  • In a facility3,27290%

Dr. Lee compared with the California median for pathologists, 2024

  • Dr. Lee
  • California median
Medicare services
3,622vs 1,1533.1 times
Medicare patients
1,132vs 4472.5 times

Medians across 1,094 pathologists in California with Dmand AI profiles that report each measure.

Dr. Lee's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Lee

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Thomas Keywon Lee treated 1,132 Medicare patients in 2024, average age 76

CMS counts 1,132 Medicare patients who saw Dr. Lee in 2024. The largest group is 75 to 84, with 496 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 7% are also on Medicaid. Their average risk score is 1.51, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Lee's median patient age at 63, with 56% women.

Medicare patients, 20241,132
Average age76
Average risk score1.51
Also on Medicaid7%

Dr. Lee's Medicare patients by age, 2024

Dr. Lee's Medicare patients by sex, 2024

  • Women50044%
  • Men63256%

Chronic conditions among Dr. Lee's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis47%
  4. Cancer42%
  5. Ischemic heart disease37%
  6. Chronic kidney disease27%
  7. Diabetes27%
  8. Atrial fibrillation26%

Share of Medicare patients with each condition. A patient can have several.

Dr. Lee's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 63

Patient panel by sex, all payers

  • Women56%
  • Men43%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Thomas Keywon Lee scored 75 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Lee for performance year 2024, reported as part of a group. Dr. Lee accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. Lee's MIPS scores, performance year 2024

  • 75of 100Final score
  • 70of 100Quality
  • 40of 100Improvement Activities

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Thomas Keywon Lee has 35 publications on record

Dmand AI links 35 papers to Dr. Lee, published from 2003 to 2021. 2017 was the busiest year, with 3. The most frequent topics are Prostatic Neoplasms, Liver and Glutathione. Dr. Lee has published most often in Am J Surg Pathol. Dr. Lee's most frequent co-authors are Jonathan Ira Epstein, MD, Roozbeh Houshyar, MD and Jaime Landman, MD.

Papers35
Years published2003 to 2021

Dr. Lee's papers by year, 2003 to 2021

Topics Dr. Lee writes about most

  • Prostatic Neoplasms
  • Liver
  • Glutathione
  • Neoplasm Grading
  • Biopsy
  • Carrier Proteins
  • Diagnosis, Differential
  • Disease Progression

Dr. Lee's most frequent co-authors

Recent publications by Dr. Lee

See all 35 publications and co-authors

See who Dr. Lee researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Lee works with, so you can find a warm path to the right pathologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Thomas Keywon Lee received $2,094 in industry payments from 2018 to 2022

CMS Open Payments shows 18 general payments to Dr. Lee from 8 drug and device companies from 2018 to 2022. Travel and lodging make up the largest share, 64% of the total. Ventana Medical Systems, Inc. paid the most, $1,214.

General payments to Dr. Lee by program year, 2018 to 2022

General payments to Dr. Lee by kind, 2018 to 2022

$2.1Kin total
  • Travel and lodging$1,34264%
  • Food and beverage$75236%

Companies that paid Dr. Lee the most, 2018 to 2022

Share is of all general payments to this clinician.

See all payments to Dr. Lee

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Thomas Keywon Lee graduated from George Washington University School of Medicine and Health Sciences

Dr. Lee graduated from George Washington University School of Medicine and Health Sciences in 2006.

  1. Medical schoolGeorge Washington University School of Medicine and Health Sciences
  2. Board certified in pathology - anatomicAmerican Board of Pathology

Source: Dmand AI Professional Profile Data

Dr. Thomas Keywon Lee accepts plans from 8 insurance carriers

Dr. Lee is in network with 8 carriers, including Excellus BlueCross BlueShield, United Healthcare and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.

  • Excellus BlueCross BlueShield
  • United Healthcare
  • Blue Cross Blue Shield of Massachusetts
  • Aspirus Health Plan
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare
  • Elevance
  • HCSC

Plan types Dr. Lee accepts, by number of carriers

  1. PPO5
  2. Medicare4
  3. POS3
  4. EPO2
  5. HMO2

Source: Dmand AI Insurance Network Data

Sources for Dr. Thomas Keywon Lee's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Thomas Keywon Lee

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Thomas Keywon Lee's NPI number?

Dr. Thomas Keywon Lee's NPI number is 1548314313. It was assigned on January 22, 2007, and it is active in the NPI Registry.

What kind of doctor is Dr. Thomas Keywon Lee?

Dr. Thomas Keywon Lee is a pathologist in Orange, California. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).

Where does Dr. Thomas Keywon Lee practice?

Dr. Lee practices at 1140 West La Veta Ave, Suite 300, Orange, CA 92868. Dr. Lee's primary practice is Pavilion Surgery Center in Orange, California. Dmand AI also links Dr. Lee to 1 hospital and 4 medical groups.

What is Dr. Thomas Keywon Lee's office phone number?

The practice phone on file for Dr. Lee is (949) 390-9656.

What is Dr. Thomas Keywon Lee's medical license number?

Dr. Lee holds California license A106146, one of the licenses on file in 14 states.

Which states has Dr. Thomas Keywon Lee been licensed in?

Dmand AI has state licenses on file for Dr. Lee in California (2008 to 2026), New York (2021 to 2026), Maryland (2014 to 2016), Nebraska (2014 to 2016), Ohio (2014 to 2016), Arkansas (2014 to 2015), Colorado (2014 to 2015), Iowa (2014 to 2015), Kansas (2014 to 2015), Kentucky (2014 to 2015), New Jersey (2014 to 2015), Tennessee (2009 to 2015), Washington (2010 to 2015) and Pennsylvania (2014).

Which hospitals is Dr. Thomas Keywon Lee affiliated with?

Dr. Lee is affiliated with Hoag Hospital Newport Beach. Dmand AI links Dr. Lee to 1 more hospital.

What medical group is Dr. Thomas Keywon Lee part of?

Dr. Lee is linked to UCI Health Pathology and Laboratory Services. Dmand AI links Dr. Lee to 4 more medical groups.

Does Dr. Thomas Keywon Lee accept Medicare?

Yes. CMS data shows Dr. Lee billed Medicare for 3,622 services in 2024, and Dr. Lee accepts Medicare assignment.

What is Dr. Thomas Keywon Lee's MIPS score?

Dr. Lee's MIPS final score for performance year 2024 is 75 out of 100, reported as part of a group.

Show 9 more questionsShow fewer questions

How many Medicare patients does Dr. Thomas Keywon Lee see?

CMS counts 1,132 Medicare patients who saw Dr. Lee in 2024, with an average age of 76.

Is Dr. Thomas Keywon Lee board certified?

Yes. Dr. Lee is board certified in pathology - anatomic by the American Board of Pathology.

What services does Dr. Thomas Keywon Lee bill to Medicare?

In 2024, Dr. Lee's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88341) and lab and pathology test (88307).

Where did Dr. Thomas Keywon Lee go to medical school?

Dr. Lee graduated from George Washington University School of Medicine and Health Sciences in 2006.

Has Dr. Thomas Keywon Lee received payments from drug or device companies?

CMS Open Payments shows $2,094 in general payments to Dr. Lee from 8 companies from 2018 to 2022. The largest total came from Ventana Medical Systems, Inc.

How long has Dr. Thomas Keywon Lee been practicing?

Dr. Lee graduated from medical school in 2006, 20 years ago.

Does Dr. Thomas Keywon Lee do research?

Dmand AI links 35 publications to Dr. Lee, published from 2003 to 2021.

Who does Dr. Thomas Keywon Lee publish with?

Dr. Lee's most frequent co-authors are Jonathan Ira Epstein, MD (8 shared papers), Roozbeh Houshyar, MD (3 shared papers) and Jaime Landman, MD (3 shared papers).

What insurance does Dr. Thomas Keywon Lee accept?

Dr. Lee is in network with 8 carriers, including Excellus BlueCross BlueShield, United Healthcare and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.

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