Mavis Song Peng, MD
Internal Medicine Physician · Orange, CA
Mavis Song Peng, MD is an internal medicine physician with a practice address in Orange, California, and NPI 1922637966, issued on Apr 2, 2020. Check the license (California A185893, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mavis Song Peng
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A185893 CA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S, Orange, CA 92868
- Phone
- (714) 456-8888
- Enumerated
- Apr 2, 2020
- Record last updated
- Jun 13, 2025
- Medicaid ID
- 351356256015 VA
- Medicare enrollment
- Enrolled (PECOS I20230706002356); accepts Medicare assignment
- Medical or professional school
- Virginia Commonwealth University, School Of Medicine, 2020
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 101 The City Dr S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danny Abad, PAPhysician Assistant1477158673
- Edward AbaradoStudent in an Organized Health Care Education/Training Program1912855198
- Nagina Abdiani, DOGeriatric Medicine (Family Medicine) Physician1518543271
- Mariam Abdul-Latif, M.D.Pediatrics Physician1538418884
- Eric AbelloOtolaryngology Physician1922566215
- Brandon Abeyta, MDAnesthesiology Physician1841291804
Verify Mavis Song Peng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A185893Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,714 Medicare Part D claims for 183 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 88 claims were for opioids.
Most prescribed
- Eliquis110 claims
- Atorvastatin Calcium94 claims
- Oxycodone Hcl55 claims
- Amlodipine Besylate52 claims
- Pantoprazole Sodium51 claims
- Gabapentin50 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
- The Regents OF The University OF California-IrvineOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mavis Song Peng among 17,696 internal medicine physician records in California
Mavis Song Peng, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2020 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
187 internal medicine physician records list a practice address in Orange
They are 187 of the 13,245 NPPES records with a practice address in Orange, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Orange → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jane Abdelhadi, M.D.Orange, CA 928681124097100
- Edwin Alexander, M.D.Orange, CA 928681659315752
- Romilla Batra, MDOrange, CA 928681871545038
- Ronald Daoud, M.D.Orange, CA 928681093732992
- Nadia Elihu, M.D.Orange, CA 928681659340156
- Roy Herndon, M.D.Orange, CA 928681417928383
- Deepti Pandita, MDOrange, CA 928681255358727
- Maryam Rahimi, MDOrange, CA 928681043268949
Common questions
What is Mavis Song Peng, MD's NPI number?
Mavis Song Peng, MD's National Provider Identifier (NPI) is 1922637966, issued on Apr 2, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Mavis Song Peng, MD located?
The NPPES record lists a practice address at 101 The City Dr S, Orange, CA, 92868. Phone: (714) 456-8888. Providers update this record themselves, so call before visiting.
How can I verify Mavis Song Peng, MD's license?
NPPES lists California license number A185893, 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 Mavis Song Peng, MD prescribe under Medicare Part D?
In 2024, Mavis Song Peng, MD had 1,714 Medicare Part D claims for 183 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.