Dr. Youngjun Park, MD
- Medicare services, 2024
- 635
- Medicare patients, 2024
- 174
- Part D claims, 2024
- 739
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 435 Oakmead Parkway, Sunnyvale, CA 94085
- Practice phone
- Call (800) 800-5655
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ascend Clinical
Clinical Lab - Full Service · Sunnyvale, California
Find Dr. Park'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. Youngjun Park is a nephrologist in Sunnyvale, California
Dr. Park practices at Ascend Clinical in Sunnyvale, California.
Dr. Park's NPI, 1275971004, was assigned on June 14, 2013. Dr. Park graduated from New York University Grossman School of Medicine in 2013. Dr. Park holds New York license 293184.
- NPI
- 1275971004NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9830449883
- NPI enumeration date
- June 14, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (800) 800-5655
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Youngjun Park practices at Ascend Clinical in Sunnyvale, California
Dr. Park's primary practice is Ascend Clinical, at 435 Oakmead Parkway, Sunnyvale, CA 94085. The practice phone is (800) 800-5655.
- Ascend Clinical435 Oakmead Parkway, Sunnyvale, CA 94085Phone(800) 800-5655
Source: Dmand AI Affiliation Data
Dr. Youngjun Park is affiliated with 8 sites of care and 2 medical groups
Dr. Park's primary practice is Ascend Clinical in Sunnyvale, California. Dr. Park is also affiliated with NYU Langone Hospital-Suffolk. The medical group on file is NYU Langone Orthopedic Surgery Associates. Dmand AI also links Dr. Park to 1 more hospital, 3 dialysis centers, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Youngjun Park's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Park practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ascend Clinical | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Youngjun Park is one of 1,401 nephrologists in California
Nephrology is Dr. Park's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Park is licensed in New York.
Specialties and state licenses
- Nephrology, New YorkPrimary
Nephrologists near Dr. Park
Counts of nephrologists 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. Youngjun Park billed Medicare for 635 services in 2024
CMS data shows 635 Medicare services from Dr. Park across 8 procedure codes in 2024, for 174 Medicare patients. Medicare paid $81,757 for them.
Dr. Park's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 3692024: 3583%
- Office and hospital visits
- 2023: 2772024: 2587%
- Surgery
- 2023: 02024: 19
Where Dr. Park's Medicare services took place, 2024
- In an office26141%
- In a facility37459%
Dr. Park compared with the California median for nephrologists, 2024
- Dr. Park
- California median
- Medicare services
- 635vs 1,08441% below
- Medicare patients
- 174vs 30743% below
- Part D claims
- 604vs 95537% below
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Park'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. Park?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Park and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Youngjun Park treated 174 Medicare patients in 2024, average age 71
CMS counts 174 Medicare patients who saw Dr. Park in 2024. The largest group is 75 to 84, with 62 patients. 75% of them have chronic kidney disease, and 75% have diabetes. 76% are also on Medicaid. Their average risk score is 6.03, 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. Park's median patient age at 67, with 51% women.
Dr. Park's Medicare patients by age, 2024
Dr. Park's Medicare patients by sex, 2024
- Women8951%
- Men8549%
Chronic conditions among Dr. Park's Medicare patients, 2024
- Chronic kidney disease75%
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Heart failure59%
- Ischemic heart disease53%
- Arthritis47%
- Mood disorders42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Park's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Youngjun Park wrote 739 Medicare Part D claims in 2024
In 2024, Dr. Park wrote 739 Medicare Part D claims for 107 patients. 70% of them were for generic drugs. CMS names the drug for 604 of them, across 13 drugs with 11 or more claims each, at $242,749 in total drug cost. In 2023, CMS named 439 claims across 15 drugs.
Dr. Park's Part D claims by kind of drug, 2024
- Generic520 claims70%
- Brand-name219 claims30%
Dr. Park'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: 4392024: 60438%
Drugs named by CMS: 13 in 2024, 15 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
How Dr. Youngjun Park takes part in Medicare
Dr. Park accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Youngjun Park has 1 publication on record
Dmand AI links 1 paper to Dr. Park in 2017. Dr. Park's most frequent co-authors are Olufemi Bunmi Aina, MBBS, Linle Hou, MD and Kathleen Cecile Leger, MD.
Dr. Park's most frequent co-authors
- Olufemi Bunmi Aina, MBBS1 shared paper
- Linle Hou, MD1 shared paper
- Kathleen Cecile Leger, MD1 shared paper
Recent publications by Dr. Park
See who Dr. Park researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Park works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Youngjun Park received $789 in industry payments from 2018 to 2025
CMS Open Payments shows 35 general payments to Dr. Park from 16 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 91% of the total. Novartis Pharmaceuticals Corporation paid the most, $89.
General payments to Dr. Park by program year, 2018 to 2025
General payments to Dr. Park by kind, 2018 to 2025
- Food and beverage$71591%
- Education$749%
Companies that paid Dr. Park the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Youngjun Park graduated from New York University Grossman School of Medicine
Dr. Park graduated from New York University Grossman School of Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Youngjun Park'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) |
| 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 |
| 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. Youngjun Park
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. Youngjun Park's NPI number?
Dr. Youngjun Park's NPI number is 1275971004. It was assigned on June 14, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Youngjun Park?
Dr. Youngjun Park is a nephrologist in Sunnyvale, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Youngjun Park practice?
Dr. Park practices at 435 Oakmead Parkway, Sunnyvale, CA 94085. Dr. Park's primary practice is Ascend Clinical in Sunnyvale, California. Dmand AI also links Dr. Park to 1 hospital, 3 dialysis centers, 2 group practices and clinics and 1 medical group.
What is Dr. Youngjun Park's office phone number?
The practice phone on file for Dr. Park is (800) 800-5655.
What is Dr. Youngjun Park's medical license number?
Dr. Park holds New York license 293184.
Which hospitals is Dr. Youngjun Park affiliated with?
Dr. Park is affiliated with NYU Langone Hospital-Suffolk. Dmand AI links Dr. Park to 1 more hospital.
What medical group is Dr. Youngjun Park part of?
Dr. Park is linked to NYU Langone Orthopedic Surgery Associates. Dmand AI links Dr. Park to 1 more medical group.
Does Dr. Youngjun Park accept Medicare?
Yes. CMS data shows Dr. Park billed Medicare for 635 services in 2024, and Dr. Park accepts Medicare assignment.
How many Medicare patients does Dr. Youngjun Park see?
CMS counts 174 Medicare patients who saw Dr. Park in 2024, with an average age of 71.
What services does Dr. Youngjun Park bill to Medicare?
In 2024, Dr. Park's most billed Medicare services were dialysis (90935), hospital inpatient care (99232) and dialysis (90961).
Show 6 more questionsShow fewer questions
Where did Dr. Youngjun Park go to medical school?
Dr. Park graduated from New York University Grossman School of Medicine in 2013.
What drugs does Dr. Youngjun Park prescribe most?
In 2024 Medicare Part D data, Dr. Park's most prescribed drugs by claims were Rayaldee, Calcitriol and Sevelamer Carbonate.
Has Dr. Youngjun Park received payments from drug or device companies?
CMS Open Payments shows $789 in general payments to Dr. Park from 16 companies from 2018 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Youngjun Park been practicing?
Dr. Park graduated from medical school in 2013, 13 years ago.
Does Dr. Youngjun Park do research?
Dmand AI links 1 publication to Dr. Park.
Who does Dr. Youngjun Park publish with?
Dr. Park's most frequent co-authors are Olufemi Bunmi Aina, MBBS (1 shared paper), Linle Hou, MD (1 shared paper) and Kathleen Cecile Leger, MD (1 shared paper).
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