Dr. William Breen , DDS
Dentist - General Practice β’ Eugene, OR
895 Country Club Rd, C-100
Eugene, OR 974016003
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. William Breen is listed in NPPES under Dentist - General Practice.
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NPI assigned on October 3, 2006; this date does not establish years in practice.
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Published CMS data list 26 Medicare Part D prescriptions, including refills, in 2014.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2014. Published rows only; this is not a quality measure.
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Published Part D records, 2014:
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) β 14 prescription fills, including refills.
- Cephalexin β 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2014. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
Practice Location & Contact Primary Location
895 Country Club Rd
C-100
Eugene, OR 974016003
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Dentist - General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
26 standardized 30-day fills in 2014
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$141 in 2014
The total cost of these prescriptions in 2014, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2014.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019β2025.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Eugene and Oregon
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Breen are from 2014.
108 active clinicians are listed under Dentist - General Practice with a practice address in Eugene, OR (1,894 in Oregon).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Eugene
0% of these 108 clinicians have the CMS telehealth indicator.
0% of these 108 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
CMS data for Part D prescriptions are available for 2014 only.
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30-day fills
CMS data for 30-day fills are available for 2014 only.
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Part D drug cost
CMS data for Part D drug cost are available for 2014 only.
Sources: CMS Medicare Part D Prescribers (2014), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2014.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 14 | 61 | $63.24 | β |
| Cephalexin | Cephalexin | 12 | 116 | $77.86 | β |
Source: CMS Part D by Provider and Drug, 2014; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 1223G0001X
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dentist - General Practice
Doctor of Dental Surgery
Career & Practice History
NPI enumerated October 03, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Dentist - General Practices in Eugene
- Dr. Shahram Rezaee, DMD
- Dr. Henery Bumstead, DDS
- Dr. Timothy Lee, DDS
- Dr. Carolyn Cantrell, DMD
- Claire Skach
- Dr. Andrea Sivavajchaipong, DDS
Mailing Address
3210 Inspiration Point Dr
Eugene, OR 974052320
Phone: 5413028079