Dr. Yu-Hung Patty Peng, MD
- Part D claims, 2024
- 3,063
- Hospital affiliations
- 2
- Industry payments
- $27
- Medical groups
- 2
- State licenses
- 3
- Practice address
- 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598
- Practice phone
- Call (925) 939-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Peng'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. Yu-Hung Patty Peng is an internist in Walnut Creek, California
Dr. Peng practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health.
Dr. Peng's NPI, 1922298520, was assigned on July 30, 2007. Dr. Peng graduated from UVA School of Medicine in 2000. Dr. Peng holds California license A78650.
- NPI
- 1922298520NPI Registry (opens in a new tab)
- NPI enumeration date
- July 30, 2007
- NPI status
- Active
- Practice phone
- (925) 939-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Yu-Hung Patty Peng practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California
Dr. Peng's primary practice is John Muir Medical Center, Walnut Creek, at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 in Contra Costa County. The practice phone is (925) 939-3000.
- John Muir Medical Center, Walnut Creek1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 · Contra Costa CountyPhone(925) 939-3000
Source: Dmand AI Affiliation Data
Dr. Yu-Hung Patty Peng is affiliated with 2 sites of care and 2 medical groups
Dr. Peng's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Peng to 1 more hospital 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. Yu-Hung Patty Peng's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Peng practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John Muir Medical Center, Walnut Creek | Available with a free account |
| +1 more site and 1 medical group | 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 John Muir Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Yu-Hung Patty Peng is one of 16,751 internists in California
Internal medicine is Dr. Peng's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Peng is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Peng's licenses on file in 3 states: California, Virginia and Pennsylvania.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Virginia license
- Pennsylvania license
Internists near Dr. Peng
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. Yu-Hung Patty Peng's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Peng's median patient age at 68, with 63% women.
Dr. Peng's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women63%
- Men37%
Source: Dmand AI Patient Panel Data
Dr. Yu-Hung Patty Peng wrote 3,063 Medicare Part D claims in 2024
In 2024, Dr. Peng wrote 3,063 Medicare Part D claims for 259 patients. 84% of them were for generic drugs. CMS names the drug for 2,514 of them, across 71 drugs with 11 or more claims each, at $249,041 in total drug cost. In 2023, CMS named 1,806 claims across 51 drugs.
Dr. Peng's Part D claims by kind of drug, 2024
- Generic2,569 claims84%
- Brand-name460 claims15%
- Other34 claims1%
Dr. Peng'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. Peng's Part D claims, 2024
- Opioids3%86 of 3,063 claims
- Antibiotics1%28 of 3,063 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: 1,8062024: 2,51439%
Drugs named by CMS: 71 in 2024, 51 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
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Dr. Yu-Hung Patty Peng received $27 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Peng from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $27.
Companies that paid Dr. Peng the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Yu-Hung Patty Peng graduated from UVA School of Medicine
Dr. Peng graduated from UVA School of Medicine in 2000.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Yu-Hung Patty Peng'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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. Yu-Hung Patty Peng
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. Yu-Hung Patty Peng's NPI number?
Dr. Yu-Hung Patty Peng's NPI number is 1922298520. It was assigned on July 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Yu-Hung Patty Peng?
Dr. Yu-Hung Patty Peng is an internist in Walnut Creek, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Yu-Hung Patty Peng practice?
Dr. Peng practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. Dr. Peng's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dmand AI also links Dr. Peng to 1 hospital and 1 medical group.
What is Dr. Yu-Hung Patty Peng's office phone number?
The practice phone on file for Dr. Peng is (925) 939-3000.
What is Dr. Yu-Hung Patty Peng's medical license number?
Dr. Peng holds California license A78650, one of the licenses on file in 3 states.
Which states has Dr. Yu-Hung Patty Peng been licensed in?
Dmand AI has state licenses on file for Dr. Peng in California (2017 to 2027), Virginia (2008 to 2018) and Pennsylvania (2000 to 2001).
Which hospitals is Dr. Yu-Hung Patty Peng affiliated with?
Dr. Peng practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California. Dmand AI links Dr. Peng to 1 more hospital.
What medical group is Dr. Yu-Hung Patty Peng part of?
Dr. Peng is linked to The Permanente Medical Group, Inc. Dmand AI links Dr. Peng to 1 more medical group.
Is Dr. Yu-Hung Patty Peng board certified?
Yes. Dr. Peng is board certified in internal medicine by the American Board of Internal Medicine.
Where did Dr. Yu-Hung Patty Peng go to medical school?
Dr. Peng graduated from UVA School of Medicine in 2000.
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What drugs does Dr. Yu-Hung Patty Peng prescribe most?
In 2024 Medicare Part D data, Dr. Peng's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Levothyroxine Sodium.
Has Dr. Yu-Hung Patty Peng received payments from drug or device companies?
CMS Open Payments shows $27 in general payments to Dr. Peng from 1 company from 2017 to 2017. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Yu-Hung Patty Peng been practicing?
Dr. Peng graduated from medical school in 2000, 26 years ago.
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