Leah Phan, D.O.
Family Medicine Physician · Fountain Valley, CA
Leah Phan, D.O. is a family medicine physician with a practice address in Fountain Valley, California, and NPI 1104288562, issued on Mar 24, 2016. Check the license (California 20A15916, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leah Phan
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A15916 CA
Self-reported in NPPES; status is on the state search - Practice location
- 16333 Harbor Blvd., Fountain Valley, CA 92708
- Phone
- (714) 549-1300
- Enumerated
- Mar 24, 2016
- Record last updated
- Feb 26, 2026
- Fax
- (714) 433-3100
- Medicare enrollment
- Enrolled (PECOS I20190701000887); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 16333 Harbor Blvd.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arfa Babaknia, M.D.Family Medicine Physician1205826849
- Armand Widjaja, M.D.Pediatrics Physician1336335322
Verify Leah Phan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A15916Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average family medicine physician in 2024
2,150 Medicare Part D claims for 277 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 19 claims were for opioids.
Most prescribed
- Atorvastatin Calcium206 claims
- Losartan Potassium127 claims
- Levothyroxine Sodium121 claims
- Amlodipine Besylate95 claims
- Metformin Hcl68 claims
- Hydrochlorothiazide62 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
- Memorialcare Medical FoundationFountain Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leah Phan among 17,133 family medicine physician records in California
Leah Phan, D.O. is one of 17,133 family 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 2016, is newer than 76% of them.
- NPI issued2016 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2016 · median 2005 among the 10,652 with a school on file
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
51 family medicine physician records list a practice address in Fountain Valley
They are 51 of the 2,190 NPPES records with a practice address in Fountain Valley, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Fountain Valley → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Arfa Babaknia, M.D.Fountain Valley, CA 927081205826849
- Hung-Chuan Cheng, M.D.Fountain Valley, CA 927081053389023
- Brian Coyne, M.D.Fountain Valley, CA 927081457306334
- Nasrin Damoui, MDFountain Valley, CA 927081841295326
- Robert Devereaux, MDFountain Valley, CA 927081043264781
- David Dunckel, MDFountain Valley, CA 927081518957794
- Edgar Fernandez, DOFountain Valley, CA 927081033157235
- Jo Lieberman Pan, MDFountain Valley, CA 927081598756090
Common questions
What is Leah Phan, D.O.'s NPI number?
Leah Phan, D.O.'s National Provider Identifier (NPI) is 1104288562, issued on Mar 24, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Leah Phan, D.O. located?
The NPPES record lists a practice address at 16333 Harbor Blvd., Fountain Valley, CA, 92708. Phone: (714) 549-1300. Providers update this record themselves, so call before visiting.
How can I verify Leah Phan, D.O.'s license?
NPPES lists California license number 20A15916, 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 Leah Phan, D.O. prescribe under Medicare Part D?
In 2024, Leah Phan, D.O. had 2,150 Medicare Part D claims for 277 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.