Dr. Daniel Constandse, MD
- Medicare services, 2019
- 15
- Medicare patients, 2024
- 11
- Part D claims, 2024
- 3,018
- Industry payments
- $45
- Affiliated sites
- 1
- Practice address
- 661 West First Street, Suite G, Tustin, CA 92780
- Practice phone
- Call (714) 665-9890
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Families Together of Orange County
FQHC - Main Site · Tustin, California
Find Dr. Constandse's professional email, personal email and mobile number
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Dr. Daniel Constandse is an adult medicine physician in Tustin, California
Dr. Constandse practices at Families Together of Orange County in Tustin, California.
Dr. Constandse's NPI, 1275725087, was assigned on August 15, 2007. Dr. Constandse holds California license 100929.
- NPI
- 1275725087NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527144757
- NPI enumeration date
- August 15, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 665-9890
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Daniel Constandse practices at Families Together of Orange County in Tustin, California
Dr. Constandse's primary practice is Families Together of Orange County, at 661 West First Street, Suite G, Tustin, CA 92780. The practice phone is (714) 665-9890.
- Families Together of Orange County661 West First Street, Suite G, Tustin, CA 92780Phone(714) 665-9890
Source: Dmand AI Affiliation Data
Dr. Daniel Constandse is affiliated with 1 site of care and 2 medical groups
Dr. Constandse's primary practice is Families Together of Orange County in Tustin, California. The medical group on file is Families Together of Orange County. Dmand AI also links Dr. Constandse to 1 more medical group, named with a free account. Dr. Constandse's employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Daniel Constandse's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Constandse practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Families Together of Orange County | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Daniel Constandse is one of 299 adult medicine physicians in California
Adult medicine is Dr. Constandse's primary specialty in the NPI Registry, under taxonomy code 207QA0505X. Dr. Constandse is licensed in California.
Specialties and state licenses
- Adult medicine, CaliforniaPrimary
Adult medicine physicians near Dr. Constandse
Counts of adult medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Daniel Constandse billed Medicare for 15 services in 2019
CMS data shows 15 Medicare services from Dr. Constandse across 1 procedure code in 2019, all of them office visits, for 11 Medicare patients. Medicare paid $708 for them. Every service was in an office.
Dr. Constandse's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 162019: 156%
Dr. Constandse compared with the California median for adult medicine physicians, 2019
- Dr. Constandse
- California median
- Medicare services
- 15vs 19992% below
- Medicare patients
- 11vs 10990% below
- Part D claims
- 2,625vs 9632.7 times
Medians across 284 adult medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Constandse's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Constandse and other adult medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Daniel Constandse treated 11 Medicare patients in 2024, average age 66
CMS counts 11 Medicare patients who saw Dr. Constandse in 2024. The largest group is 75 to 84, with 0 patients. Their average risk score is 1.02, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Constandse's median patient age at 47, with 63% women.
Dr. Constandse's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Constandse's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 47
Patient panel by sex, all payers
- Women63%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Daniel Constandse wrote 3,018 Medicare Part D claims in 2024
In 2024, Dr. Constandse wrote 3,018 Medicare Part D claims for 532 patients. 91% of them were for generic drugs. CMS names the drug for 2,625 of them, across 50 drugs with 11 or more claims each, at $67,449 in total drug cost. In 2023, CMS named 4,514 claims across 71 drugs.
Dr. Constandse's Part D claims by kind of drug, 2024
- Generic2,733 claims91%
- Brand-name219 claims7%
- Other66 claims2%
Dr. Constandse's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Constandse's Part D claims, 2024
- Antibiotics1%29 of 3,018 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,5142024: 2,62542%
Drugs named by CMS: 50 in 2024, 71 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Daniel Constandse takes part in Medicare
Dr. Constandse accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Daniel Constandse received $45 in industry payments in 2025
CMS Open Payments shows 2 general payments to Dr. Constandse from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Eli Lilly and Company paid the most, $24.
Companies that paid Dr. Constandse the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Daniel Constandse's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Daniel Constandse
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Daniel Constandse's NPI number?
Dr. Daniel Constandse's NPI number is 1275725087. It was assigned on August 15, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel Constandse?
Dr. Daniel Constandse is an adult medicine physician in Tustin, California. The primary specialty in the NPI Registry is Adult Medicine Physician (taxonomy code 207QA0505X).
Where does Dr. Daniel Constandse practice?
Dr. Constandse practices at 661 West First Street, Suite G, Tustin, CA 92780. Dr. Constandse's primary practice is Families Together of Orange County in Tustin, California. Dmand AI also links Dr. Constandse to 1 medical group.
What is Dr. Daniel Constandse's office phone number?
The practice phone on file for Dr. Constandse is (714) 665-9890.
What is Dr. Daniel Constandse's medical license number?
Dr. Constandse holds California license 100929.
What medical group is Dr. Daniel Constandse part of?
Dr. Constandse is linked to Families Together of Orange County. Dmand AI links Dr. Constandse to 1 more medical group.
Does Dr. Daniel Constandse accept Medicare?
Yes. CMS data shows Dr. Constandse billed Medicare for 15 services in 2019, and Dr. Constandse accepts Medicare assignment.
How many Medicare patients does Dr. Daniel Constandse see?
CMS counts 11 Medicare patients who saw Dr. Constandse in 2024, with an average age of 66.
What services does Dr. Daniel Constandse bill to Medicare?
In 2019, Dr. Constandse's most billed Medicare services were office visit, established patient (99213).
What drugs does Dr. Daniel Constandse prescribe most?
In 2024 Medicare Part D data, Dr. Constandse's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Metformin HCl.
Has Dr. Daniel Constandse received payments from drug or device companies?
CMS Open Payments shows $45 in general payments to Dr. Constandse from 2 companies from 2025 to 2025. The largest total came from Eli Lilly and Company.
How long has Dr. Daniel Constandse been practicing?
Dr. Constandse graduated from medical school in 2001, 25 years ago.
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