Cynthia Ran Peng, M.D.
Emergency Medicine Physician · Stanford, CA
Cynthia Ran Peng, M.D. is an emergency medicine physician with a practice address in Stanford, California, and NPI 1952789463, issued on May 16, 2015. Check the license (California A153848, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cynthia Ran Peng
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- A153848 CA
MT208458 PA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- May 16, 2015
- Record last updated
- Apr 8, 2022
- Medicare enrollment
- Enrolled (PECOS I20220421002232); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Cynthia Ran Peng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A153848Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average emergency medicine physician in 2024
234 Medicare Part D claims for 195 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Nitrofurantoin Mono-Macro30 claims
- Amoxicillin-Clavulanate Potass17 claims
- Cefdinir15 claims
- Fluconazole15 claims
- Doxycycline Monohydrate14 claims
- Oxycodone Hcl13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF The Mid Atlantic States, IncLargo, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cynthia Ran Peng among 7,751 emergency medicine physician records in California
Cynthia Ran Peng, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 72% of them.
- NPI issued2015 · 72% of these records are older, 25% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2015 · median 2011 among the 4,560 with a school on file
- Record last updated2022 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
163 emergency medicine physician records list a practice address in Stanford
They are 163 of the 5,606 NPPES records with a practice address in Stanford, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Stanford → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Milana Boukhman, MDStanford, CA 943051902863210
- Ian Brown, MDStanford, CA 943051851320451
- Ian Ferguson, D.O.Stanford, CA 943051265495345
- Marc Gautreau, MDStanford, CA 943051932182185
- David Ghilarducci, MDStanford, CA 943051861435661
- Michael Gisondi, MDStanford, CA 943051659317121
- Prasanthi Govindarajan, MDStanford, CA 943051205879517
- Grant Lipman, M.DStanford, CA 943051255374005
Common questions
What is Cynthia Ran Peng, M.D.'s NPI number?
Cynthia Ran Peng, M.D.'s National Provider Identifier (NPI) is 1952789463, issued on May 16, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Cynthia Ran Peng, M.D. located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Cynthia Ran Peng, M.D.'s license?
NPPES lists California license number A153848, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cynthia Ran Peng, M.D. prescribe under Medicare Part D?
In 2024, Cynthia Ran Peng, M.D. had 234 Medicare Part D claims for 195 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.