Derek Q. Phan, MD
Cardiovascular Disease Physician · Temescal Valley, CA
Derek Q. Phan, MD is a cardiovascular disease physician with a practice address in Temescal Valley, California, and NPI 1598184244, issued on Apr 9, 2014. Check the license (California A138554, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Derek Q. Phan
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License numbers
- A138554 CA
100522 WI
0447579 KS
MD61123756 WA
Self-reported in NPPES; status is on the state search - Practice location
- 21634 Retreat Pkwy, Temescal Valley, CA 92883
- Phone
- (951) 493-6650
- Enumerated
- Apr 9, 2014
- Record last updated
- Jul 31, 2023
- Medicare enrollment
- Enrolled (PECOS I20180316001855); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 2,574 in California → Look up another NPI →
Also registered at 21634 Retreat Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mario Flores, D.O.Pain Medicine (Anesthesiology) Physician1184088841
- Yu-Chen Lee, AUDAudiologist1427890763
- Mandira Patel, DOCardiovascular Disease Physician1114452810
- Katrina Stinson, M.D.Obstetrics & Gynecology Physician1881957686
Verify Derek Q. Phan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A138554Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
108 Medicare Part D claims for 53 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Clopidogrel53 claims
- Brilinta12 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
- Southern California Permanente Medical GroupLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Derek Q. Phan among 2,574 cardiovascular disease physician records in California
Derek Q. Phan, MD is one of 2,574 cardiovascular disease physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 84% of them.
- NPI issued2014 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2014 · median 1999 among the 1,742 with a school on file
- Record last updated2023 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in California
There are 2,574 cardiovascular disease physician records in California.
All 2,574 in California → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Mandira Patel, DOTemescal Valley, CA 928831114452810
- L R Moscoso, M.D.Corona, CA 928821073548962
- Gilbert Plasencia, M.D.Corona, CA 928821043245822
- Narakanti Rao, MDCorona, CA 928821003919655
- William Suh, MDCorona, CA 928821740200351
- Sa'd Tuqan, M.D.Corona, CA 928821629030895
- Musuvathy Jhansi, MDYorba Linda, CA 928861912000449
- Brian Chen, D.O.Corona, CA 928791053792366
Common questions
What is Derek Q. Phan, MD's NPI number?
Derek Q. Phan, MD's National Provider Identifier (NPI) is 1598184244, issued on Apr 9, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Derek Q. Phan, MD located?
The NPPES record lists a practice address at 21634 Retreat Pkwy, Temescal Valley, CA, 92883. Phone: (951) 493-6650. Providers update this record themselves, so call before visiting.
How can I verify Derek Q. Phan, MD's license?
NPPES lists California license number A138554, 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 Derek Q. Phan, MD prescribe under Medicare Part D?
In 2024, Derek Q. Phan, MD had 108 Medicare Part D claims for 53 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.