Dr. Daniel Tamashiro , MD
Internal Medicine β’ Clackamas, OR
9800 Se Sunnyside Rd
Clackamas, OR 970159750
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. Daniel Tamashiro is listed in NPPES under Internal Medicine.
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NPI assigned on August 16, 2006; this date does not establish years in practice.
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Published CMS data list 14,799 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Losartan Potassium β 752 prescription fills, including refills.
- Atorvastatin Calcium β 707 prescription fills, including refills.
- Simvastatin β 634 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 166 records in the table Β· Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 95% of clinicians listed under Internal Medicine in Clackamas, OR (2024, 68 clinicians with data). Median for this group: 374. Middle half: 156 to 2,548.
More Part D prescriptions than 95% of clinicians listed under Internal Medicine in Oregon (2024, 1,220 clinicians with data). Median for this group: 560. Middle half: 88 to 4,272.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 15,241 in 2020 to 14,799 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2020β2024.
Practice Location & Contact Primary Location
9800 Se Sunnyside Rd
Clackamas, OR 970159750
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Kaiser Foundation Health Plan Of The Northwest. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
1990
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
33,499 standardized 30-day fills in 2024
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
$611,788 in 2024
The total cost of these prescriptions in 2024, 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, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019β2025.
Years since graduation
36 years (graduated 1990)
CMS Doctors and Clinicians data list 1990 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
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.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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, CMS release of October 2, 2026; 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, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Tamashiro has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Tamashiro as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Clackamas and Oregon
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 95% of clinicians listed under Internal Medicine in Clackamas, OR (2024, 68 clinicians with data). Median for this group: 374. Middle half: 156 to 2,548.
More Part D prescriptions than 95% of clinicians listed under Internal Medicine in Oregon (2024, 1,220 clinicians with data). Median for this group: 560. Middle half: 88 to 4,272.
Part D drug cost
A higher Part D drug cost than 95% of clinicians listed under Internal Medicine in Clackamas, OR (2024, 68 clinicians with data). Median for this group: $19,132. Middle half: $7,638 to $170,823.
A higher Part D drug cost than 90% of clinicians listed under Internal Medicine in Oregon (2024, 1,220 clinicians with data). Median for this group: $34,363. Middle half: $2,390 to $304,595.
101 active clinicians are listed under Internal Medicine with a practice address in Clackamas, OR (2,136 in Oregon).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Clackamas
5.9% of these 101 clinicians have the CMS telehealth indicator.
73.3% of these 101 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
Medicare Part D prescriptions stayed about the same: 15,241 in 2020 and 14,799 in 2024.
- 2020: 15,241
- 2021: 14,843
- 2022: 14,818
- 2023: 14,281
- 2024: 14,799
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30-day fills
30-day fills stayed about the same: 34,464 in 2020 and 33,499 in 2024.
- 2020: 34,464
- 2021: 33,496
- 2022: 33,348
- 2023: 32,599
- 2024: 33,499
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Part D drug cost
Part D drug cost increased 13% from $541,188 in 2020 to $611,788 in 2024.
- 2020: $541,188
- 2021: $555,434
- 2022: $515,594
- 2023: $546,102
- 2024: $611,788
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, 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 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Losartan Potassium | Losartan Potassium | 752 | 64,997 | $8,597.93 | 222 |
| Atorvastatin Calcium | Atorvastatin Calcium | 707 | 60,930 | $8,062.25 | 208 |
| Simvastatin | Simvastatin | 634 | 53,406 | $6,774.38 | 168 |
| Amlodipine Besylate | Amlodipine Besylate | 627 | 54,315 | $7,126.87 | 184 |
| Oxycodone Hcl | Oxycodone Hcl | 471 | 9,254 | $10,856.07 | 72 |
| Levothyroxine Sodium | Levothyroxine Sodium | 418 | 32,155 | $6,611.99 | 105 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 343 | 6,919 | $6,807.61 | 65 |
| Lisinopril | Lisinopril | 340 | 29,010 | $3,694.96 | 102 |
| Tamsulosin Hcl | Tamsulosin Hcl | 332 | 26,895 | $4,840.73 | 104 |
| Pantoprazole Sodium | Pantoprazole Sodium | 328 | 26,120 | $4,485.21 | 124 |
| Metoprolol Tartrate | Metoprolol Tartrate | 325 | 26,682 | $3,390.16 | 102 |
| Trazodone Hcl | Trazodone Hcl | 302 | 19,223 | $3,693.46 | 87 |
| Glipizide | Glipizide | 296 | 24,060 | $2,815.04 | 85 |
| Gabapentin | Gabapentin | 289 | 17,724 | $5,291.59 | 88 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 287 | 8,632 | $6,103.47 | 93 |
| Metformin Hcl | Metformin Hcl | 274 | 23,013 | $2,896.39 | 79 |
| Potassium Chloride | Potassium Chloride | 271 | 19,702 | $8,189.22 | 84 |
| Metoprolol Succinate | Metoprolol Succinate | 252 | 20,295 | $3,439.75 | 74 |
| Pradaxa | Dabigatran Etexilate Mesylate | 230 | 16,620 | $55,525.88 | 70 |
| Furosemide | Furosemide | 202 | 14,655 | $2,285.81 | 67 |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 198 | 4,697 | $7,234.16 | 23 |
| Pravastatin Sodium | Pravastatin Sodium | 193 | 17,070 | $2,648.86 | 54 |
| Atenolol | Atenolol | 191 | 17,040 | $2,283.19 | 56 |
| Hydrochlorothiazide | Hydrochlorothiazide | 187 | 16,080 | $1,991.61 | 62 |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 170 | 14,526 | $2,324.69 | 45 |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20080115000729
OR
1456432509
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
Kaiser Foundation Health Plan Of The Northwest
10100 Se Sunnyside Rd, Clackamas, OR 970158970
Phone: 8008132000
Kaiser Foundation Health Plan Of The Northwest
10180 Se Sunnyside Rd, Clackamas, OR 970158970
Phone: 8008132000
Kaiser Foundation Health Plan Of The Northwest
14406 Ne 20th Ave, Vancouver, WA 986861448
Phone: 8008132000
Kaiser Foundation Health Plan Of The Northwest
9800 Se Sunnyside Rd, Clackamas, OR 970159750
Phone: 8008132000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Family Medicine
Internal Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Dermatology
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.), MSPH
Career & Practice History
NPI enumerated August 16, 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 November 2026.
NPI Administrative Meta
Other Internal Medicine Providers in Clackamas
- Dr. Derrick Lee, MD
- Dr. Albert Oh, MD
- Dr. Andrea Veryser, MD
- Dr. Stephanie Cha, MD
- Dr. Corinne Klykov, MD
- Dr. Magdalena Kasprowska, MD
Mailing Address
9800 Se Sunnyside Rd
Clackamas, OR 970159750
Phone: 5035710378