$750 in research paymentsAlzheimer DiseaseTauopathiesLY3303560 - IVLY3303560 - SCSaline Solution - IV
Dr. Stephen A. Yu, MD
NPI1295284834PAC ID2860771557
- Medicare services, 2024
- 564
- Medicare patients, 2024
- 155
- Part D claims, 2024
- 2,682
- Clinical trials
- 2
- Hospital affiliations
- 1
- Practice address
- 4900 Barranca Pkwy, Irvine, CA 92604
- Practice phone
- Call (949) 726-0677
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Irvine Multi Specialty Surgical Care
Irvine, California
Find Dr. Yu's professional email, personal email and mobile number
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Dr. Stephen A. Yu is a family medicine physician in Irvine, California
Dr. Yu practices at Irvine Multi Specialty Surgical Care in Irvine, California.
Dr. Yu's NPI, 1295284834, was assigned on September 23, 2016. Dr. Yu graduated from Ohio State University College of Medicine in 2015. Dr. Yu holds California license 145119.
NPI and contact details
- NPI
- 1295284834NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860771557
- NPI enumeration date
- September 23, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (949) 726-0677
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen A. Yu practices at Irvine Multi Specialty Surgical Care in Irvine, California
Dr. Yu's primary practice is Irvine Multi Specialty Surgical Care, at 4900 Barranca Pkwy, Irvine, CA 92604 in Orange County. The practice phone is (949) 726-0677.
- Irvine Multi Specialty Surgical Care4900 Barranca Pkwy, Irvine, CA 92604 · Orange CountyPhone(949) 726-0677
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen A. Yu is affiliated with 3 sites of care and 1 medical group
Dr. Yu's primary practice is Irvine Multi Specialty Surgical Care in Irvine, California. Dr. Yu is also affiliated with Hoag Hospital Newport Beach. The medical group on file is Hoag Clinic. Dmand AI also links Dr. Yu to 1 more group practice or clinic, named with a free account.
Irvine Multi Specialty Surgical CarePrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Stephen A. Yu's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Yu practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Irvine Multi Specialty Surgical Care | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen A. Yu is one of 15,680 family medicine physicians in California
Family medicine is Dr. Yu's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Yu is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Family medicine physicians near Dr. Yu
Counts of family medicine physicians 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. Stephen A. Yu billed Medicare for 564 services in 2024
CMS data shows 564 Medicare services from Dr. Yu across 13 procedure codes in 2024, for 155 Medicare patients. Medicare paid $54,365 for them. Every service was in an office.
Medicare services, 2024564
Medicare patients155
Paid by Medicare$54,365
Procedure codes13
Dr. Yu's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3112024: 34210%
- Other services
- 2023: 1052024: 12014%
- Tests and treatments
- 2023: 652024: 7718%
- Lab and pathology
- 2023: 332024: 2524%
Dr. Yu compared with the California median for family medicine physicians, 2024
- Dr. Yu
- California median
- Medicare services
- 564vs 2462.3 times
- Medicare patients
- 155vs 11831% above
- Part D claims
- 2,075vs 8332.5 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Yu'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen A. Yu treated 155 Medicare patients in 2024, average age 73
CMS counts 155 Medicare patients who saw Dr. Yu in 2024. The largest group is 65 to 74, with 92 patients. 75% of them have high cholesterol, and 61% have high blood pressure. 14% 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. Yu's median patient age at 57, with 44% women.
Medicare patients, 2024155
Average age73
Average risk score0.99
Also on Medicaid14%
Dr. Yu's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Yu's Medicare patients by sex, 2024
- Women7649%
- Men7951%
Chronic conditions among Dr. Yu's Medicare patients, 2024
- High cholesterol75%
- High blood pressure61%
- Arthritis42%
- Diabetes28%
- Osteoporosis22%
- Anxiety19%
- Ischemic heart disease19%
- Chronic kidney disease15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Yu's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women44%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen A. Yu wrote 2,682 Medicare Part D claims in 2024
In 2024, Dr. Yu wrote 2,682 Medicare Part D claims for 293 patients. 91% of them were for generic drugs. CMS names the drug for 2,075 of them, across 55 drugs with 11 or more claims each, at $140,697 in total drug cost. In 2023, CMS named 1,982 claims across 59 drugs.
Part D claims, 20242,682
Drugs named by CMS55
Total drug cost$140,697
Part D patients293
Dr. Yu's Part D claims by kind of drug, 2024
- Generic2,447 claims91%
- Brand-name213 claims8%
- Other22 claims1%
Dr. Yu'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. Yu's Part D claims, 2024
- Opioids2%52 of 2,682 claims
- Antibiotics1%36 of 2,682 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: 1,9822024: 2,0755%
Drugs named by CMS: 55 in 2024, 59 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. Stephen A. Yu offers telehealth to Medicare patients
Dr. Yu accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Yu 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)
Removal or shaving of skin growth: 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. Stephen A. Yu has worked on 2 clinical trials
Dmand AI links Dr. Yu to 2 clinical trials. Conditions studied include Alzheimer Disease and Tauopathies. Eli Lilly and Company sponsors the most, 2. Open Payments lists research payments to Dr. Yu that name 2 trials.
Conditions in Dr. Yu's trials
- Alzheimer Disease
- Tauopathies
Investigators on the most trials with Dr. Yu
- Hakop Gevorkyan, MD2 shared trials
- Anita Afzali, MD1 shared trial
- Alexander J. Higgins, MD1 shared trial
Recent clinical trials with Dr. Yu
$375 in research paymentsLY3375880 IVLY3375880 SC
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. Stephen A. Yu received $560 in industry payments from 2017 to 2025
CMS Open Payments shows 24 general payments to Dr. Yu from 8 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. Sumitomo Pharma America, Inc. paid the most, $200. It also lists 3 research payments totaling $2,357 in 2018, naming 2 clinical trials.
General payments to Dr. Yu by program year, 2017 to 2025
Companies that paid Dr. Yu the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen A. Yu graduated from Ohio State University College of Medicine
Dr. Yu graduated from Ohio State University College of Medicine in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen A. Yu'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) |
| Clinical trials and co-investigators | ClinicalTrials.gov (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 |
| 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. Stephen A. Yu
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. Stephen A. Yu's NPI number?
Dr. Stephen A. Yu's NPI number is 1295284834. It was assigned on September 23, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen A. Yu?
Dr. Stephen A. Yu is a family medicine physician in Irvine, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Stephen A. Yu practice?
Dr. Yu practices at 4900 Barranca Pkwy, Irvine, CA 92604. Dr. Yu's primary practice is Irvine Multi Specialty Surgical Care in Irvine, California. Dmand AI also links Dr. Yu to 1 group practice or clinic.
What is Dr. Stephen A. Yu's office phone number?
The practice phone on file for Dr. Yu is (949) 726-0677.
What is Dr. Stephen A. Yu's medical license number?
Dr. Yu holds California license 145119.
Which hospitals is Dr. Stephen A. Yu affiliated with?
Dr. Yu is affiliated with Hoag Hospital Newport Beach.
What medical group is Dr. Stephen A. Yu part of?
Dr. Yu is linked to Hoag Clinic.
Does Dr. Stephen A. Yu accept Medicare?
Yes. CMS data shows Dr. Yu billed Medicare for 564 services in 2024, and Dr. Yu accepts Medicare assignment.
Does Dr. Stephen A. Yu offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Yu as offering telehealth services.
How many Medicare patients does Dr. Stephen A. Yu see?
CMS counts 155 Medicare patients who saw Dr. Yu in 2024, with an average age of 73.
Show 6 more questionsShow fewer questions
What services does Dr. Stephen A. Yu bill to Medicare?
In 2024, Dr. Yu's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and office visit, established patient (99213).
Where did Dr. Stephen A. Yu go to medical school?
Dr. Yu graduated from Ohio State University College of Medicine in 2015.
What drugs does Dr. Stephen A. Yu prescribe most?
In 2024 Medicare Part D data, Dr. Yu's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Amlodipine Besylate.
Has Dr. Stephen A. Yu received payments from drug or device companies?
CMS Open Payments shows $560 in general payments to Dr. Yu from 8 companies from 2017 to 2025. The largest total came from Sumitomo Pharma America, Inc.
How long has Dr. Stephen A. Yu been practicing?
Dr. Yu graduated from medical school in 2015, 11 years ago.
Does Dr. Stephen A. Yu do research?
Dr. Yu has worked on 2 clinical trials.
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