Daniel Constandse, MD
Adult Medicine Physician · Tustin, CA
Daniel Constandse, MD is an adult medicine physician with a practice address in Tustin, California, and NPI 1275725087, issued on Aug 15, 2007. Check the license (California A100929, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Daniel Constandse
- Credential
- MD
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- A100929 CA
Self-reported in NPPES; status is on the state search - Practice location
- 661 W 1St St Ste G, Tustin, CA 92780
- Phone
- (714) 665-9890
- Enumerated
- Aug 15, 2007
- Record last updated
- Oct 22, 2025
- Fax
- (714) 665-9891
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 386 in California → Look up another NPI →
Also registered at 661 W 1St St Ste G
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Bernard Bennett, MDInternal Medicine Physician1871568899
- Viktoriya Birger, NP-CFamily Nurse Practitioner1720853153
- Heather Bonnville, PHYSICIAN ASSISTANTPhysician Assistant1770762429
- Robert Borrowdale, M.D.Obstetrics & Gynecology Physician1013958545
Verify Daniel Constandse in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A100929Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% more Medicare Part D claims than the average adult medicine physician in 2024
3,018 Medicare Part D claims for 532 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Atorvastatin Calcium407 claims
- Amlodipine Besylate201 claims
- Metformin Hcl186 claims
- Lisinopril184 claims
- Losartan Potassium150 claims
- Omeprazole102 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.
Daniel Constandse among 386 adult medicine physician records in California
Daniel Constandse, MD is one of 386 adult medicine physician records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 35% of them.
- NPI issued2007 · 35% of these records are older, 49% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% of these records are
- Record last updated2025 · 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 207QA0505X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in California
There are 386 adult medicine physician records in California.
All 386 in California → Every provider in Tustin → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Charles Chol Bae Kim, MDTustin, CA 927801225564818
- Ardientes Tolentino, NURSE PRACTITIONERAnaheim, CA 928041497257505
- Ga Yun ParkAnaheim, CA 928051891667549
- Krista Prewett, FNPAnaheim, CA 928061619513611
- Marigangaiah Mahadev, MDAnaheim Hills, CA 928081245264902
- Albert CooperBrea, CA 928211134522279
- Dawn Vollmann, PABrea, CA 928211104335934
- Charles Myung, M.D.Garden Grove, CA 928411205387743
Common questions
What is Daniel Constandse, MD's NPI number?
Daniel Constandse, MD's National Provider Identifier (NPI) is 1275725087, issued on Aug 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Constandse, MD located?
The NPPES record lists a practice address at 661 W 1St St Ste G, Tustin, CA, 92780. Phone: (714) 665-9890. Providers update this record themselves, so call before visiting.
How can I verify Daniel Constandse, MD's license?
NPPES lists California license number A100929, 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 Daniel Constandse, MD prescribe under Medicare Part D?
In 2024, Daniel Constandse, MD had 3,018 Medicare Part D claims for 532 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.