Dr. Christopher Vanderwarker , MD
Internal Medicine • Seattle, WA
1660 S Columbian Way
Seattle, WA 981081532
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. Christopher Vanderwarker is listed in NPPES under Internal Medicine.
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NPI assigned on August 11, 2008; this date does not establish years in practice.
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Published CMS data list 41 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium — 14 prescription fills, including refills.
- Eliquis (Apixaban) — 14 prescription fills, including refills.
- Tamsulosin Hcl — 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 85% of clinicians listed under Internal Medicine in Seattle, WA (2024, 381 clinicians with data). Median for this group: 875. Middle half: 121 to 2,630.
Fewer Part D prescriptions than 85% of clinicians listed under Internal Medicine in Washington (2024, 1,654 clinicians with data). Median for this group: 834. Middle half: 101 to 3,989.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 83 in 2020 to 41 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
1660 S Columbian Way
Seattle, WA 981081532
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
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
45 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
$8,643 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 – by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
NPI first issued
2008
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, “Does your provider accept Medicare as full payment?”
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.
Enrolled in Medicare (PECOS)
Dr. Vanderwarker 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. Vanderwarker 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 Seattle and Washington
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 85% of clinicians listed under Internal Medicine in Seattle, WA (2024, 381 clinicians with data). Median for this group: 875. Middle half: 121 to 2,630.
Fewer Part D prescriptions than 85% of clinicians listed under Internal Medicine in Washington (2024, 1,654 clinicians with data). Median for this group: 834. Middle half: 101 to 3,989.
Part D drug cost
A lower Part D drug cost than 70% of clinicians listed under Internal Medicine in Seattle, WA (2024, 381 clinicians with data). Median for this group: $73,115. Middle half: $8,159 to $248,861.
A lower Part D drug cost than 65% of clinicians listed under Internal Medicine in Washington (2024, 1,654 clinicians with data). Median for this group: $61,689. Middle half: $2,998 to $293,737.
821 active clinicians are listed under Internal Medicine with a practice address in Seattle, WA (3,081 in Washington).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Seattle
26.8% of these 821 clinicians have the CMS telehealth indicator.
49.7% of these 821 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 decreased 51% from 83 in 2020 to 41 in 2024.
- 2020: 83
- 2021: 175
- 2022: 104
- 2023: 212
- 2024: 41
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30-day fills
30-day fills decreased 46% from 83 in 2020 to 45 in 2024.
- 2020: 83
- 2021: 185
- 2022: 126
- 2023: 228
- 2024: 45
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Part D drug cost
Part D drug cost increased 541% from $1,347 in 2020 to $8,643 in 2024.
- 2020: $1,347
- 2021: $20,513
- 2022: $16,031
- 2023: $31,578
- 2024: $8,643
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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 |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 14 | 534 | $264.35 | — |
| Eliquis | Apixaban | 14 | 391 | $8,193.35 | — |
| Tamsulosin Hcl | Tamsulosin Hcl | 13 | 390 | $185.48 | — |
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
Self-certified to NPPES: 2025-01-03NUCC 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 PECOSORDER AND REFERRING ONLY - FAMILY PRACTICE
I20250220001994
WA
3274778253
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Doctor of Medicine (M.D.)
Hospitalist
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Dermatology
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1660 S COLUMBIAN WAY, SEATTLE, WA 981081532 (Tel: 2067642551)
Registered at VA PUGET SOUND HEALTH CARE SYSTEM, 1660 S COLUMBIAN WAY, SEATTLE, WA 981081597 (Tel: 2067685378)
NPI status registered as active in NPPES database
Registered at 1959 NE PACIFIC ST, BOX 356421, SEATTLE, WA 981956421 (Tel: 2066804227)
Registered at 1959 NE PACIFIC ST, BOX 356421, SEATTLE, WA 981956421 (Tel: 2066804227)
Recorded as CHRISTOPHER VANDERWARKER, MD
Internal Medicine (license number reported to NPPES: WA ML60019713)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Seattle
- Dr. John Graham, MD
- Dr. James Darnton, MD
- Dr. Robyn Winsor, MD
- Dr. Divya Gollapudi, MD
- Dr. Jessica Rongitsch, MD
- Dr. Richard Fogerty, MD
Mailing Address
Va Puget Sound Health Care System, 1660 S Columbian Way
Seattle, WA 981081597
Phone: 2067685378