Dr. Yen-Chung A. Lee, MD

  • Pleasanton, CA
  • General surgeon
NPI1306864897PAC ID2466430285
Medicare services, 2024
384
Medicare patients, 2024
241
Part D claims, 2024
138
Hospital affiliations
3
Industry payments
$12,875
Practice address
5565 W Las Positas Blvd, Pleasanton, CA 94588
Professional email
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Mobile number
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Primary practice

Stanford Care Digestive Health Center of Pleasanton - HOPD

Acute Care Hospital outpatient department · Pleasanton, California

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Dr. Yen-Chung A. Lee is a general surgeon in Pleasanton, California

Dr. Lee practices at Stanford Care Digestive Health Center of Pleasanton - HOPD in Pleasanton, California.

Dr. Lee's NPI, 1306864897, was assigned on July 17, 2006. Dr. Lee graduated from McGill University Faculty of Medicine in 1998. Dr. Lee holds California license A70226.

NPI and contact details
Medicare PAC ID
2466430285
NPI enumeration date
July 17, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
54
Medical school graduation
1998

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

Dr. Yen-Chung A. Lee practices at Stanford Care Digestive Health Center of Pleasanton - HOPD in Pleasanton, California

Dr. Lee's primary practice is Stanford Care Digestive Health Center of Pleasanton - HOPD, at 5565 W Las Positas Blvd, Pleasanton, CA 94588.

  • Stanford Care Digestive Health Center of Pleasanton - HOPD
    5565 W Las Positas Blvd, Pleasanton, CA 94588

Source: Dmand AI Affiliation Data

Dr. Yen-Chung A. Lee is affiliated with 6 sites of care and 2 medical groups

Dr. Lee's primary practice is Stanford Care Digestive Health Center of Pleasanton - HOPD in Pleasanton, California. Dr. Lee is also affiliated with Stanford Health Care Tri-Valley. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Lee to 2 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.

See all 8 affiliations for Dr. Lee

Source: Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Yen-Chung A. Lee's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lee practices, 6 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Stanford Care Digestive Health Center of Pleasanton - HOPDAvailable with a free account
+5 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Yen-Chung A. Lee is one of 2,926 general surgeons in California

Surgery is Dr. Lee's primary specialty in the NPI Registry, under taxonomy code 208600000X. 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 Rhode Island.

Specialties and state licenses

  • Surgery, CaliforniaPrimaryLicense A70226 · 1999 to 2027 · taxonomy 208600000X
  • Rhode Island license2003 to 2004

Clinical focus

Dmand AI lists abdominal adhesion surgery, abdominal hernia repair surgery, acute gallbladder or bile duct inflammation, bariatric surgery, colon removal, esophagus, stomach, or upper small intestine surgery, gallbladder removal and groin hernia surgery among the conditions Dr. Lee treats.

General surgeons near Dr. Lee

Counts of general 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. Yen-Chung A. Lee billed Medicare for 384 services in 2024

CMS data shows 384 Medicare services from Dr. Lee across 10 procedure codes in 2024, for 241 Medicare patients. Medicare paid $71,546 for them.

Medicare services, 2024384
Medicare patients241
Paid by Medicare$71,546
Procedure codes10

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

  • 2023
  • 2024
Office and hospital visits
2023: 2592024: 31321%
Surgery
2023: 462024: 7154%

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

  • In an office23060%
  • In a facility15440%

Dr. Lee compared with the California median for general surgeons, 2024

  • Dr. Lee
  • California median
Medicare services
384vs 1662.3 times
Medicare patients
241vs 12199% above
Part D claims
81vs 342.4 times

Medians across 2,606 general 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.

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. Yen-Chung A. Lee treated 241 Medicare patients in 2024, average age 74

CMS counts 241 Medicare patients who saw Dr. Lee in 2024. The largest group is 65 to 74, with 113 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 1.30, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Lee's median patient age at 61, with 47% women.

Medicare patients, 2024241
Average age74
Average risk score1.30
Also on Medicaid22%

Dr. Lee's Medicare patients by age, 2024

Dr. Lee's Medicare patients by sex, 2024

  • Women10544%
  • Men13656%

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

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis45%
  4. Chronic kidney disease38%
  5. Ischemic heart disease26%
  6. Diabetes25%
  7. Anxiety22%
  8. Mood disorders22%

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 61

Patient panel by sex, all payers

  • Women47%
  • Men51%

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

Dr. Yen-Chung A. Lee wrote 138 Medicare Part D claims in 2024

In 2024, Dr. Lee wrote 138 Medicare Part D claims for 96 patients. 94% of them were for generic drugs. CMS names the drug for 81 of them, across 2 drugs with 11 or more claims each, at $727 in total drug cost. In 2023, CMS named 64 claims across 1 drug.

Part D claims, 2024138
Drugs named by CMS2
Total drug cost$727
Part D patients96

Dr. Lee's Part D claims by kind of drug, 2024

  • Generic130 claims94%
  • Brand-name and other8 claims6%

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.

Drug classes CMS tracks in Dr. Lee's Part D claims, 2024

  • Opioids60%83 of 138 claims
  • Antibiotics12%16 of 138 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 642024: 8127%

Drugs named by CMS: 2 in 2024, 1 in 2023.

See all prescribing by Dr. Lee

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. Yen-Chung A. Lee ranks in the 95th percentile for hernia repair (minimally invasive) in Medicare

Dr. Lee accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Lee as offering telehealth. CMS counts 31 procedures of hernia repair (minimally invasive) by Dr. Lee, more than 95% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Where Dr. Lee ranks in Medicare procedure volume

Hernia repair (minimally invasive)
95th percentile31 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)

Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)

Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)

Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)

Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)

Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)

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Dr. Yen-Chung A. Lee received $12,875 in industry payments from 2016 to 2023

CMS Open Payments shows 40 general payments to Dr. Lee from 5 drug and device companies from 2016 to 2023. Education make up the largest share, 84% of the total. Intuitive Surgical, Inc. paid the most, $12,393.

General payments to Dr. Lee by program year, 2016 to 2023

General payments to Dr. Lee by kind, 2016 to 2023

$12.9Kin total
  • Education$10,75384%
  • Food and beverage$2,12316%

Companies that paid Dr. Lee the most, 2016 to 2023

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. Yen-Chung A. Lee graduated from McGill University Faculty of Medicine

Dr. Lee graduated from McGill University Faculty of Medicine in 1998.

  1. Medical schoolMcGill University Faculty of Medicine
  2. Board certified in surgeryAmerican Board of Surgery

Source: Dmand AI Professional Profile Data

Dr. Yen-Chung A. Lee accepts plans from 11 insurance carriers

Dr. Lee is in network with 11 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

  • Elevance
  • Aetna
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Regence Health Plans
  • AK State Medicaid
  • +3 more carriersWith a free account

Plan types Dr. Lee accepts, by number of carriers

  1. Medicare8
  2. PPO6
  3. HMO5
  4. POS4
  5. EPO3
  6. Medicaid2

Source: Dmand AI Insurance Network Data

Sources for Dr. Yen-Chung A. 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 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)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
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. Yen-Chung A. 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. Yen-Chung A. Lee's NPI number?

Dr. Yen-Chung A. Lee's NPI number is 1306864897. It was assigned on July 17, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Yen-Chung A. Lee?

Dr. Yen-Chung A. Lee is a general surgeon in Pleasanton, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).

Where does Dr. Yen-Chung A. Lee practice?

Dr. Lee practices at 5565 W Las Positas Blvd, Pleasanton, CA 94588. Dr. Lee's primary practice is Stanford Care Digestive Health Center of Pleasanton - HOPD in Pleasanton, California. Dmand AI also links Dr. Lee to 2 hospitals, 2 group practices and clinics and 1 medical group.

What is Dr. Yen-Chung A. Lee's medical license number?

Dr. Lee holds California license A70226, one of the licenses on file in 2 states.

Which states has Dr. Yen-Chung A. Lee been licensed in?

Dmand AI has state licenses on file for Dr. Lee in California (1999 to 2027) and Rhode Island (2003 to 2004).

Which hospitals is Dr. Yen-Chung A. Lee affiliated with?

Dr. Lee is affiliated with Stanford Health Care Tri-Valley. Dmand AI links Dr. Lee to 2 more hospitals.

What medical group is Dr. Yen-Chung A. Lee part of?

Dr. Lee is linked to Stanford Health Care. Dmand AI links Dr. Lee to 1 more medical group.

Does Dr. Yen-Chung A. Lee accept Medicare?

Yes. CMS data shows Dr. Lee billed Medicare for 384 services in 2024, and Dr. Lee accepts Medicare assignment.

Does Dr. Yen-Chung A. Lee offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Lee as offering telehealth services.

How many Medicare patients does Dr. Yen-Chung A. Lee see?

CMS counts 241 Medicare patients who saw Dr. Lee in 2024, with an average age of 74.

Show 7 more questionsShow fewer questions

Is Dr. Yen-Chung A. Lee board certified?

Yes. Dr. Lee is board certified in surgery by the American Board of Surgery.

What services does Dr. Yen-Chung A. Lee bill to Medicare?

In 2024, Dr. Lee's most billed Medicare services were office visit, new patient (99204), hospital inpatient care (99232) and office visit, established patient (99214).

Where did Dr. Yen-Chung A. Lee go to medical school?

Dr. Lee graduated from McGill University Faculty of Medicine in 1998.

What drugs does Dr. Yen-Chung A. Lee prescribe most?

In 2024 Medicare Part D data, Dr. Lee's most prescribed drugs by claims were Hydrocodone-Acetaminophen and Pantoprazole Sodium.

Has Dr. Yen-Chung A. Lee received payments from drug or device companies?

CMS Open Payments shows $12,875 in general payments to Dr. Lee from 5 companies from 2016 to 2023. The largest total came from Intuitive Surgical, Inc.

How long has Dr. Yen-Chung A. Lee been practicing?

Dr. Lee graduated from medical school in 1998, 28 years ago.

What insurance does Dr. Yen-Chung A. Lee accept?

Dr. Lee is in network with 11 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

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