David Deguire Chan, D.O.
Hospitalist Physician · Fountain Valley, CA
David Deguire Chan, D.O. is a hospitalist physician with a practice address in Fountain Valley, California, and NPI 1497068688, issued on Jul 16, 2010. Check the license (California 20A13372, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Deguire Chan
- Credential
- D.O.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 20A13372 CA
125057749 IL
Self-reported in NPPES; status is on the state search - Practice location
- 10840 Warner Ave Ste 103, Fountain Valley, CA 92708
- Phone
- (714) 395-4595
- Enumerated
- Jul 16, 2010
- Record last updated
- Nov 21, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 20A13372 CA
- Medicare enrollment
- Enrolled (PECOS I20140725002314); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 10840 Warner Ave Ste 103
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lisa Tran, NPFamily Nurse Practitioner1396378162
Verify David Deguire Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A13372Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average hospitalist physician in 2024
1,132 Medicare Part D claims for 237 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Pantoprazole Sodium60 claims
- Losartan Potassium49 claims
- Atorvastatin Calcium42 claims
- Metoprolol Tartrate38 claims
- Famotidine35 claims
- Memantine Hcl33 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
- Alpha Hospitalist Group IncFountain Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Deguire Chan among 3,099 hospitalist physician records in California
David Deguire Chan, D.O. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 44% of them.
- NPI issued2010 · 44% of these records are older, 53% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2010 · median 2010 among the 2,505 with a school on file
- Record last updated2019 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Fountain Valley → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Sara Ghazi, DOFountain Valley, CA 927081861816886
- Iris Gluzman, MDFountain Valley, CA 927081447323613
- Yu-Nan Hsu, D.OFountain Valley, CA 927081922382407
- Tony Khan, DOFountain Valley, CA 927081255625786
- Billy Le, D.O.Fountain Valley, CA 927081255656963
- Sapna Mehta, DOFountain Valley, CA 927081477847382
- Robert Neilan, M.D.Fountain Valley, CA 927081689763724
- Vina Nguyen, M. D.Fountain Valley, CA 927081013250497
Common questions
What is David Deguire Chan, D.O.'s NPI number?
David Deguire Chan, D.O.'s National Provider Identifier (NPI) is 1497068688, issued on Jul 16, 2010. An NPI identifies a provider in billing; it is not a license.
Where is David Deguire Chan, D.O. located?
The NPPES record lists a practice address at 10840 Warner Ave Ste 103, Fountain Valley, CA, 92708. Phone: (714) 395-4595. Providers update this record themselves, so call before visiting.
How can I verify David Deguire Chan, D.O.'s license?
NPPES lists California license number 20A13372, 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 David Deguire Chan, D.O. prescribe under Medicare Part D?
In 2024, David Deguire Chan, D.O. had 1,132 Medicare Part D claims for 237 beneficiaries; the average among hospitalist physician prescribers was 521. 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.