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Dr. Leon Y. Cheng, MD
NPI1104834407PAC ID9133185879
- Medicare services, 2024
- 363
- Medicare patients, 2024
- 187
- Part D claims, 2024
- 2,483
- Publications
- 1
- Affiliated sites
- 3
- Practice address
- 301 Old San Francisco Rd, Sunnyvale, CA 94086
- Practice phone
- Call (650) 321-4121
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Palo Alto Medial Foundation
Sunnyvale, California
Find Dr. Cheng'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. Leon Y. Cheng is an internist in Sunnyvale, California
Dr. Cheng practices at Palo Alto Medial Foundation in Sunnyvale, California.
Dr. Cheng's NPI, 1104834407, was assigned on August 3, 2006. Dr. Cheng graduated from UC Davis School of Medicine in 2000. Dr. Cheng's California license number on file is A93386.
NPI and contact details
- NPI
- 1104834407NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133185879
- NPI enumeration date
- August 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (650) 321-4121
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Leon Y. Cheng practices at Palo Alto Medial Foundation in Sunnyvale, California
Dr. Cheng's primary practice is Palo Alto Medial Foundation, at 301 Old San Francisco Rd, Sunnyvale, CA 94086 in Santa Clara County. The practice phone is (650) 321-4121.
- Palo Alto Medial Foundation301 Old San Francisco Rd, Sunnyvale, CA 94086 · Santa Clara CountyPhone(650) 321-4121
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Leon Y. Cheng is affiliated with 4 sites of care and 1 medical group
Dr. Cheng's primary practice is Palo Alto Medial Foundation in Sunnyvale, California. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Cheng to 2 more home health agencies and 1 group practice or clinic, each named with a free account.
Palo Alto Medial FoundationPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Leon Y. Cheng's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Cheng practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Palo Alto Medial Foundation | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Leon Y. Cheng is one of 16,751 internists in California
Internal medicine is Dr. Cheng's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Cheng is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Cheng's licenses on file in 4 states: California, Vermont, Wisconsin and Illinois.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Vermont license
- Wisconsin license
- Illinois license
Clinical focus
Dmand AI lists acute sinusitis, anxiety, chronic anemia, chronic diabetes, chronic hypertension, chronic obstructive pulmonary disease (COPD), conjunctivitis and contact dermatitis among the conditions Dr. Cheng treats.
Internists near Dr. Cheng
Counts of internists 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. Leon Y. Cheng billed Medicare for 363 services in 2024
CMS data shows 363 Medicare services from Dr. Cheng across 6 procedure codes in 2024, for 187 Medicare patients. Medicare paid $31,988 for them. Every service was in an office.
Medicare services, 2024363
Medicare patients187
Paid by Medicare$31,988
Procedure codes6
Dr. Cheng's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2552024: 28211%
- Other services
- 2023: 602024: 7017%
- Tests and treatments
- 2023: 172024: 1135%
Dr. Cheng compared with the California median for internists, 2024
- Dr. Cheng
- California median
- Medicare services
- 363vs 361Close to median
- Medicare patients
- 187vs 15124% above
- Part D claims
- 1,982vs 4214.7 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Cheng'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.
Need commercial claims for Dr. Cheng?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Cheng and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leon Y. Cheng treated 187 Medicare patients in 2024, average age 75
CMS counts 187 Medicare patients who saw Dr. Cheng in 2024. The largest group is 65 to 74, with 81 patients. 63% of them have high cholesterol, and 62% have high blood pressure. 13% are also on Medicaid. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Cheng's median patient age at 50, with 42% women.
Medicare patients, 2024187
Average age75
Average risk score0.99
Also on Medicaid13%
Dr. Cheng's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Cheng's Medicare patients by sex, 2024
- Women6937%
- Men11863%
Chronic conditions among Dr. Cheng's Medicare patients, 2024
- High cholesterol63%
- High blood pressure62%
- Diabetes30%
- Arthritis27%
- Chronic kidney disease21%
- Mood disorders17%
- Atrial fibrillation16%
- Cancer15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Cheng's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 50
Patient panel by sex, all payers
- Women42%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Leon Y. Cheng wrote 2,483 Medicare Part D claims in 2024
In 2024, Dr. Cheng wrote 2,483 Medicare Part D claims for 240 patients. 92% of them were for generic drugs. CMS names the drug for 1,982 of them, across 59 drugs with 11 or more claims each, at $86,541 in total drug cost. In 2023, CMS named 1,727 claims across 52 drugs.
Part D claims, 20242,483
Drugs named by CMS59
Total drug cost$86,541
Part D patients240
Dr. Cheng's Part D claims by kind of drug, 2024
- Generic2,280 claims92%
- Brand-name and other203 claims8%
Dr. Cheng'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. Cheng's Part D claims, 2024
- Opioids3%86 of 2,483 claims
- Antibiotics2%52 of 2,483 claims
- Antipsychotics, patients 65 and over1%14 of 2,483 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: 1,7272024: 1,98215%
Drugs named by CMS: 59 in 2024, 52 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. Leon Y. Cheng offers telehealth to Medicare patients
Dr. Cheng accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Cheng as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of skin lesions: 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. Leon Y. Cheng has 1 publication on record
Dmand AI links 1 paper to Dr. Cheng.
Papers1
Recent publications by Dr. Cheng
See who Dr. Cheng researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Cheng works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Leon Y. Cheng has 1 award and honors on record
Dmand AI lists 1 award for Dr. Cheng, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Cheng
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Leon Y. Cheng graduated from UC Davis School of Medicine
Dr. Cheng graduated from UC Davis School of Medicine in 2000.
- Medical school
- Board certified in internal medicine
- Board certified in pediatrics
- Board certified in sports medicine
Source: Dmand AI Professional Profile Data
Dr. Leon Y. Cheng accepts plans from 12 insurance carriers
Dr. Cheng is in network with 12 carriers, including Elevance, Aetna and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Elevance
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- HCSC
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- Cigna
- +4 more carriersWith a free account
Plan types Dr. Cheng accepts, by number of carriers
- PPO8
- HMO6
- EPO4
- POS4
- Medicare3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Leon Y. Cheng'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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)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 |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Leon Y. Cheng
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. Leon Y. Cheng's NPI number?
Dr. Leon Y. Cheng's NPI number is 1104834407. It was assigned on August 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Leon Y. Cheng?
Dr. Leon Y. Cheng is an internist in Sunnyvale, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Leon Y. Cheng practice?
Dr. Cheng practices at 301 Old San Francisco Rd, Sunnyvale, CA 94086. Dr. Cheng's primary practice is Palo Alto Medial Foundation in Sunnyvale, California. Dmand AI also links Dr. Cheng to 2 home health agencies and 1 group practice or clinic.
What is Dr. Leon Y. Cheng's office phone number?
The practice phone on file for Dr. Cheng is (650) 321-4121.
What is Dr. Leon Y. Cheng's medical license number?
Dr. Cheng's California license number on file is A93386, one of the licenses on file in 4 states.
Which states has Dr. Leon Y. Cheng been licensed in?
Dmand AI has state licenses on file for Dr. Cheng in California (2005 to 2025), Vermont (2005), Wisconsin (2004 to 2005) and Illinois (2000 to 2004).
What medical group is Dr. Leon Y. Cheng part of?
Dr. Cheng is linked to Palo Alto Foundation Medical Group.
Does Dr. Leon Y. Cheng accept Medicare?
Yes. CMS data shows Dr. Cheng billed Medicare for 363 services in 2024, and Dr. Cheng accepts Medicare assignment.
Does Dr. Leon Y. Cheng offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Cheng as offering telehealth services.
How many Medicare patients does Dr. Leon Y. Cheng see?
CMS counts 187 Medicare patients who saw Dr. Cheng in 2024, with an average age of 75.
Show 7 more questionsShow fewer questions
Is Dr. Leon Y. Cheng board certified?
Yes. Dr. Cheng is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Leon Y. Cheng bill to Medicare?
In 2024, Dr. Cheng's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and medicare service (G0439).
Where did Dr. Leon Y. Cheng go to medical school?
Dr. Cheng graduated from UC Davis School of Medicine in 2000.
What drugs does Dr. Leon Y. Cheng prescribe most?
In 2024 Medicare Part D data, Dr. Cheng's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Losartan Potassium.
How long has Dr. Leon Y. Cheng been practicing?
Dr. Cheng graduated from medical school in 2000, 26 years ago.
Does Dr. Leon Y. Cheng do research?
Dmand AI links 1 publication to Dr. Cheng.
What insurance does Dr. Leon Y. Cheng accept?
Dr. Cheng is in network with 12 carriers, including Elevance, Aetna and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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