David Flemming Chang, M.D.
Nephrology Physician · Wildomar, CA
David Flemming Chang, M.D. is a nephrology physician with a practice address in Wildomar, California, and NPI 1043266240, issued on May 26, 2006. Check the license (California A71793, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Flemming Chang
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A71793 CA
Self-reported in NPPES; status is on the state search - Practice location
- 36320 Inland Valley Dr, Wildomar, CA 92595
- Phone
- (951) 600-7630
- Enumerated
- May 26, 2006
- Record last updated
- Aug 5, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (951) 600-7164
- Medicaid ID
- 00A717930 CA
- Medicare enrollment
- Enrolled (PECOS I20040409000477); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 36320 Inland Valley Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify David Flemming Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A71793Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average nephrology physician in 2024
1,268 Medicare Part D claims for 222 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Calcitriol94 claims
- Amlodipine Besylate74 claims
- Tamsulosin Hcl72 claims
- Lisinopril69 claims
- Furosemide66 claims
- Carvedilol50 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.
Industry payments in 2024: $842.39
41 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Nephrology Associates Medical Group IncWildomar, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Flemming Chang among 1,468 nephrology physician records in California
David Flemming Chang, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1998 · median 2001 among the 1,128 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 nephrology physician records list a practice address in Wildomar
They are 6 of the 937 NPPES records with a practice address in Wildomar, and 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Wildomar → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Peter Lac, M.D.Wildomar, CA 925951881617652
- Shankha Nandi, D.O.Wildomar, CA 925951437326410
- Rachel Roan, MDWildomar, CA 925951003496894
- Weng-Lih Wang, M.D.Wildomar, CA 925951467499145
- Jerry Yu, MDWildomar, CA 925951740523133
- Mohamad Altriki, MDTemecula, CA 925921619061736
- Duc Quach, MDTemecula, CA 925921922567379
- Eric YanMenifee, CA 925861225115892
Common questions
What is David Flemming Chang, M.D.'s NPI number?
David Flemming Chang, M.D.'s National Provider Identifier (NPI) is 1043266240, issued on May 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Flemming Chang, M.D. located?
The NPPES record lists a practice address at 36320 Inland Valley Dr, Wildomar, CA, 92595. Phone: (951) 600-7630. Providers update this record themselves, so call before visiting.
How can I verify David Flemming Chang, M.D.'s license?
NPPES lists California license number A71793, 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 Flemming Chang, M.D. prescribe under Medicare Part D?
In 2024, David Flemming Chang, M.D. had 1,268 Medicare Part D claims for 222 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.