Diana Chien, DO
Emergency Medicine Physician · Rancho Mirage, CA
Diana Chien, DO is an emergency medicine physician with a practice address in Rancho Mirage, California, and NPI 1083358626, issued on Apr 20, 2022. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Diana Chien
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- OS22246 FL
Self-reported in NPPES; status is on the state search - Practice location
- 39000 Bob Hope Dr., Rancho Mirage, CA 92270
- Phone
- (760) 541-9357
- Enumerated
- Apr 20, 2022
- Record last updated
- Jul 23, 2025
- Medicare enrollment
- Enrolled (PECOS I20250727000041); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 39000 Bob Hope Dr.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Camden FullerStudent in an Organized Health Care Education/Training Program1346937166
- Edward Hernandez, M.D.Student in an Organized Health Care Education/Training Program1780379461
- Charles Lee, MDStudent in an Organized Health Care Education/Training Program1750879177
- Daniel Lee, MDStudent in an Organized Health Care Education/Training Program1588126445
- Sujay Singh, MDStudent in an Organized Health Care Education/Training Program1720877178
Verify Diana Chien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
32% fewer Medicare Part D claims than the average emergency medicine physician in 2024
153 Medicare Part D claims for 123 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 11 claims were for opioids.
Most prescribed
- Cefpodoxime Proxetil16 claims
- Sulfamethoxazole-Trimethoprim15 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
- Cep America LLCPensacola, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diana Chien among 7,751 emergency medicine physician records in California
Diana Chien, DO 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 2022, is newer than 95% of them.
- NPI issued2022 · 95% of these records are older, 2% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2022 · median 2011 among the 4,560 with a school on file
- Record last updated2025 · 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).
78 emergency medicine physician records list a practice address in Rancho Mirage
They are 78 of the 1,600 NPPES records with a practice address in Rancho Mirage, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Rancho Mirage → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Peter Andersons, MDRancho Mirage, CA 922701144241571
- Edward Cooper, M.D.Rancho Mirage, CA 922701003852658
- Manuel Dejesus, MDRancho Mirage, CA 922701366463366
- Francis Domzalski, MDRancho Mirage, CA 922701225059223
- Andrea Hladik, MDRancho Mirage, CA 922701306867395
- Euthym Kontaxis, MDRancho Mirage, CA 922701063433068
- Dennis Magnotto, MDRancho Mirage, CA 922701700807799
- Sabin Manea, MDRancho Mirage, CA 922701518988500
Common questions
What is Diana Chien, DO's NPI number?
Diana Chien, DO's National Provider Identifier (NPI) is 1083358626, issued on Apr 20, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Diana Chien, DO located?
The NPPES record lists a practice address at 39000 Bob Hope Dr., Rancho Mirage, CA, 92270. Phone: (760) 541-9357. Providers update this record themselves, so call before visiting.
How can I verify Diana Chien, DO's license?
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 Diana Chien, DO prescribe under Medicare Part D?
In 2024, Diana Chien, DO had 153 Medicare Part D claims for 123 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.