World J Pediatr Congenit Heart Surg
Dr. Timothy Mark Lee, MD
- Medicare services, 2024
- 278
- Medicare patients, 2024
- 197
- Part D claims, 2024
- 96
- Publications
- 6
- MIPS score, 2024
- 88
- Practice address
- 24451 Health Center Drive, Laguna Hills, CA 92653
- Practice phone
- Call (949) 837-4500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lee's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Timothy Mark Lee is a cardiothoracic surgeon in Laguna Hills, California
Dr. Lee practices at MemorialCare Saddleback Medical Center in Laguna Hills, California, part of MemorialCare Health System.
Dr. Lee's NPI, 1881988962, was assigned on June 6, 2011. Dr. Lee graduated from University Of Michigan Medical School in 2011. Dr. Lee's California license number on file is A154790.
- NPI
- 1881988962NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618366097
- NPI enumeration date
- June 6, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (949) 837-4500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Timothy Mark Lee practices at MemorialCare Saddleback Medical Center in Laguna Hills, California
Dr. Lee's primary practice is MemorialCare Saddleback Medical Center, at 24451 Health Center Drive, Laguna Hills, CA 92653 in Orange County. The practice phone is (949) 837-4500.
- MemorialCare Saddleback Medical Center24451 Health Center Drive, Laguna Hills, CA 92653 · Orange CountyPhone(949) 837-4500
Source: Dmand AI Affiliation Data
Dr. Timothy Mark Lee is affiliated with 2 sites of care and 1 medical group
Dr. Lee's primary practice is MemorialCare Saddleback Medical Center in Laguna Hills, California, part of MemorialCare Health System. The medical group on file is MemorialCare Medical Group. Dmand AI also links Dr. Lee to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Timothy Mark Lee's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lee practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MemorialCare Saddleback Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across MemorialCare Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Timothy Mark Lee is one of 568 cardiothoracic surgeons in California
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Lee's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Lee is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Lee's licenses on file in 2 states: California and Pennsylvania.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), CaliforniaPrimary
- Pennsylvania license
Clinical focus
Dmand AI lists heart bypass surgery and heart valve surgery among the conditions Dr. Lee treats.
Cardiothoracic surgeons near Dr. Lee
Counts of cardiothoracic surgeons 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. Timothy Mark Lee billed Medicare for 278 services in 2024
CMS data shows 278 Medicare services from Dr. Lee across 10 procedure codes in 2024, for 197 Medicare patients. Medicare paid $97,093 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Lee's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 852024: 174105%
- Surgery
- 2023: 722024: 10444%
Dr. Lee compared with the California median for cardiothoracic surgeons, 2024
- Dr. Lee
- California median
- Medicare services
- 278vs 1142.4 times
- Medicare patients
- 197vs 952.1 times
- Part D claims
- 82vs 194.3 times
Medians across 453 cardiothoracic surgeons 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Lee and other cardiothoracic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Timothy Mark Lee treated 197 Medicare patients in 2024, average age 75
CMS counts 197 Medicare patients who saw Dr. Lee in 2024. The largest group is 65 to 74, with 100 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 9% are also on Medicaid. Their average risk score is 1.31, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Lee's median patient age at 76, with 28% women.
Dr. Lee's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Lee's Medicare patients by sex, 2024
- Women5327%
- Men14473%
Chronic conditions among Dr. Lee's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease72%
- Arthritis49%
- Atrial fibrillation49%
- Heart failure40%
- Diabetes29%
- Chronic kidney disease25%
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 76
Patient panel by sex, all payers
- Women28%
- Men70%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Timothy Mark Lee wrote 96 Medicare Part D claims in 2024
In 2024, Dr. Lee wrote 96 Medicare Part D claims for 76 patients. 100% of them were for generic drugs. CMS names the drug for 82 of them, across 2 drugs with 11 or more claims each, at $543 in total drug cost. In 2023, CMS named 37 claims across 1 drug.
Dr. Lee's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 372024: 82122%
Drugs named by CMS: 2 in 2024, 1 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Timothy Mark Lee scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 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. CMS counts 32 procedures of coronary artery bypass graft (cabg) by Dr. Lee, more than 86% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Lee's MIPS scores, performance year 2024
- 88of 100Final score
- 84.1of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 74of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Lee ranks in Medicare procedure volume
- Coronary artery bypass graft (CABG)
- 86th percentile32 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Timothy Mark Lee has 6 publications on record
Dmand AI links 6 papers to Dr. Lee, published from 2011 to 2023. The most frequent topics are Aortic Valve Stenosis, Heart Valve Prosthesis and Heart Valve Prosthesis Implantation. Dr. Lee has published most often in Ann Thorac Surg. Dr. Lee's most frequent co-authors are Percy Boateng, MD, David H. Adams, MD and Sophia Leonora Alexis, MD.
Dr. Lee's papers by year, 2011 to 2023
Topics Dr. Lee writes about most
- Aortic Valve Stenosis
- Heart Valve Prosthesis
- Heart Valve Prosthesis Implantation
- Mitral Valve Insufficiency
- Prosthesis Design
- Pulmonary Artery
Dr. Lee's most frequent co-authors
- Percy Boateng, MD2 shared papers
- David H. Adams, MD1 shared paper
- Sophia Leonora Alexis, MD1 shared paper
Recent publications by Dr. Lee
J Thorac Cardiovasc Surg
Curr Cardiol Rep
Ann Thorac Surg
Ann Thorac Surg
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 cardiothoracic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Timothy Mark Lee received $1,993 in industry payments from 2016 to 2025
CMS Open Payments shows 36 general payments to Dr. Lee from 11 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. AtriCure, Inc. paid the most, $864.
General payments to Dr. Lee by program year, 2016 to 2025
Companies that paid Dr. Lee the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Timothy Mark Lee graduated from University Of Michigan Medical School
Dr. Lee graduated from University Of Michigan Medical School in 2011.
- Medical school
- Board certified in surgery
- Board certified in thoracic and cardiac surgery
Source: Dmand AI Professional Profile Data
Dr. Timothy Mark Lee accepts plans from 11 insurance carriers
Dr. Lee is in network with 11 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- +3 more carriersWith a free account
Plan types Dr. Lee accepts, by number of carriers
- Medicare7
- PPO7
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Timothy Mark Lee's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Timothy Mark 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. Timothy Mark Lee's NPI number?
Dr. Timothy Mark Lee's NPI number is 1881988962. It was assigned on June 6, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Timothy Mark Lee?
Dr. Timothy Mark Lee is a cardiothoracic surgeon in Laguna Hills, California. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).
Where does Dr. Timothy Mark Lee practice?
Dr. Lee practices at 24451 Health Center Drive, Laguna Hills, CA 92653. Dr. Lee's primary practice is MemorialCare Saddleback Medical Center in Laguna Hills, California, part of MemorialCare Health System. Dmand AI also links Dr. Lee to 1 group practice or clinic.
What is Dr. Timothy Mark Lee's office phone number?
The practice phone on file for Dr. Lee is (949) 837-4500.
What is Dr. Timothy Mark Lee's medical license number?
Dr. Lee's California license number on file is A154790, one of the licenses on file in 2 states.
Which states has Dr. Timothy Mark Lee been licensed in?
Dmand AI has state licenses on file for Dr. Lee in California (2018 to 2025) and Pennsylvania (2016 to 2018).
Which hospitals is Dr. Timothy Mark Lee affiliated with?
Dr. Lee practices at MemorialCare Saddleback Medical Center in Laguna Hills, California.
What medical group is Dr. Timothy Mark Lee part of?
Dr. Lee is linked to MemorialCare Medical Group.
Does Dr. Timothy Mark Lee accept Medicare?
Yes. CMS data shows Dr. Lee billed Medicare for 278 services in 2024, and Dr. Lee accepts Medicare assignment.
What is Dr. Timothy Mark Lee's MIPS score?
Dr. Lee's MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Timothy Mark Lee see?
CMS counts 197 Medicare patients who saw Dr. Lee in 2024, with an average age of 75.
Is Dr. Timothy Mark Lee board certified?
Yes. Dr. Lee is board certified in surgery by the American Board of Surgery.
What services does Dr. Timothy Mark Lee bill to Medicare?
In 2024, Dr. Lee's most billed Medicare services were office visit, new patient (99205), surgery: heart and blood vessels (33533) and office visit, established patient (99214).
Where did Dr. Timothy Mark Lee go to medical school?
Dr. Lee graduated from University Of Michigan Medical School in 2011.
What drugs does Dr. Timothy Mark Lee prescribe most?
In 2024 Medicare Part D data, Dr. Lee's most prescribed drugs by claims were Mupirocin and Gabapentin.
Has Dr. Timothy Mark Lee received payments from drug or device companies?
CMS Open Payments shows $1,993 in general payments to Dr. Lee from 11 companies from 2016 to 2025. The largest total came from AtriCure, Inc.
How long has Dr. Timothy Mark Lee been practicing?
Dr. Lee graduated from medical school in 2011, 15 years ago.
Does Dr. Timothy Mark Lee do research?
Dmand AI links 6 publications to Dr. Lee, published from 2011 to 2023.
Who does Dr. Timothy Mark Lee publish with?
Dr. Lee's most frequent co-authors are Percy Boateng, MD (2 shared papers), David H. Adams, MD (1 shared paper) and Sophia Leonora Alexis, MD (1 shared paper).
What insurance does Dr. Timothy Mark Lee accept?
Dr. Lee is in network with 11 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
Selling to thoracic surgery (cardiothoracic vascular surgery) practices?
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