Daniel Constandse, MD
NPI 1275725087 · Adult Medicine Physician · Tustin, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Daniel Constandse, MD is a Adult Medicine Physician provider in Tustin, CA (NPI 1275725087).
Provider details
- NPI number
- 1275725087
- Entity type
- Individual
- Primary specialty
- Adult Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A100929 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 51 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 407 | 174 |
| Amlodipine Besylate | 201 | 94 |
| Metformin Hcl | 186 | 87 |
| Lisinopril | 184 | 81 |
| Losartan Potassium | 150 | 60 |
| Omeprazole | 102 | 59 |
| Levothyroxine Sodium |
Practice location
Mailing address
Additional practice locations (2)
- 9918 Katella Ave Ste A-CAnaheim, CA 92804-6465Phone: (714) 644-9494Fax: (714) 644-9894
- 11180 Warner Ave Ste 353Fountain Valley, CA 92708-4098Phone: (714) 968-6789Fax: (714) 202-2626
Registry dates
- Enumerated
- 2007-08-15
- Last updated
- 2025-10-22
- Certified
- 2025-10-22
Frequently asked questions
- What is Daniel Constandse's NPI number?
- Daniel Constandse's National Provider Identifier (NPI) is 1275725087, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Daniel Constandse's specialty?
- Daniel Constandse is listed in the NPPES registry with a primary specialty of Adult Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Daniel Constandse located?
- Daniel Constandse's practice location on file with NPPES is 661 W 1st St Ste G, Tustin, CA 92780-2939.
- What is Daniel Constandse's phone number?
- The practice phone number listed in the NPPES registry for Daniel Constandse is (714) 665-9890.
- Does Daniel Constandse accept Medicare?
- Daniel Constandse is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Daniel Constandse's NPI active?
- Yes — Daniel Constandse's NPI (1275725087) is active in the NPPES registry as of the last update on 2025-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.