Nancy Ann Chang, DO
Family Medicine Physician · Oceanside, CA
Nancy Ann Chang, DO is a family medicine physician with a practice address in Oceanside, California, and NPI 1710241559, issued on Jun 26, 2012. Check the license (California 20A24359, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nancy Ann Chang
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 20A24359 CA
DO182981 OR
Self-reported in NPPES; status is on the state search - Practice location
- 4318 Mission Ave, Oceanside, CA 92057
- Phone
- (760) 901-5010
- Enumerated
- Jun 26, 2012
- Record last updated
- Feb 11, 2026
- Medicare enrollment
- Enrolled (PECOS I20260225001864); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 4318 Mission Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Devin Anderson, FNPFamily Nurse Practitioner1215451117
- Angelique Beach, FNP-CFamily Nurse Practitioner1174006936
- Madalasa Bista, M.D.Family Medicine Physician1174966444
- Michelle Buxton, PA-CMedical Physician Assistant1326076043
- Connie Chen, MDFamily Medicine Physician1851319693
- Kristin Dampier, FNP-CFamily Nurse Practitioner1912450156
Verify Nancy Ann Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A24359Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average family medicine physician in 2024
3,972 Medicare Part D claims for 457 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 60 claims were for opioids.
Most prescribed
- Atorvastatin Calcium346 claims
- Levothyroxine Sodium153 claims
- Losartan Potassium149 claims
- Lisinopril137 claims
- Amlodipine Besylate128 claims
- Hydrochlorothiazide109 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
- Scripps HealthOceanside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
68 family medicine physician records list a practice address in Oceanside
They are 68 of the 3,438 NPPES records with a practice address in Oceanside, and 17,133 family medicine physician records in California.
All 68 in Oceanside → All 17,133 in California → Every provider in Oceanside →
Other family medicine physician records in California
- Omer Aba-Omer, MDSanta Monica, CA1649702093
- Michelle Ababa, MDWilmington, CA1710922513
- Anna Tzeitel Abalos, MDRoseville, CA1720200017
- Adan Abarca, MDAnaheim, CA1760553689
- Vanessa Abarca, DOVentura, CA1952040859
- Lorraine Abate, M.D.Sacramento, CA1104840008
- Robert Abatecola, MDCastro Valley, CA1669551719
- Romeo Abaya, M.D.Cottonwood, CA1598053506
- Effiem Abbah, MD, MPHSan Francisco, CA1821185133
- Khuzeman Abbasi, MDSanta Rosa, CA1841979952
Common questions
What is Nancy Ann Chang, DO's NPI number?
Nancy Ann Chang, DO's National Provider Identifier (NPI) is 1710241559, issued on Jun 26, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Ann Chang, DO located?
The NPPES record lists a practice address at 4318 Mission Ave, Oceanside, CA, 92057. Phone: (760) 901-5010. Providers update this record themselves, so call before visiting.
How can I verify Nancy Ann Chang, DO's license?
NPPES lists California license number 20A24359, 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 Nancy Ann Chang, DO prescribe under Medicare Part D?
In 2024, Nancy Ann Chang, DO had 3,972 Medicare Part D claims for 457 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.