William Harrer, M.D.
NPI 1972584217 · Medical Oncology Physician · Sequim, WA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Harrer, M.D. is a Medical Oncology Physician provider in Sequim, WA (NPI 1972584217).
Provider details
- NPI number
- 1972584217
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- ME81806 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
541 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 305 | $91 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 128 | $124 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 53 | $16 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 23 | $163 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 17 | $112 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 46 | 23 |
| Potassium Chloride | 31 | 12 |
| Ondansetronbrand: Ondansetron Odt | 30 | 18 |
| Rivaroxabanbrand: Xarelto | 24 | — |
| Hydroxyurea | 23 | — |
| Apixabanbrand: Eliquis | 22 | — |
| Letrozole | 22 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$84 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-11
- Last updated
- 2023-10-12
- Certified
- 2023-10-12
Frequently asked questions
- What is William Harrer's NPI number?
- William Harrer's National Provider Identifier (NPI) is 1972584217, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Harrer's specialty?
- William Harrer is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Harrer located?
- William Harrer's practice location on file with NPPES is 844 N 5th Ave, Sequim, WA 98382-3045.
- What is William Harrer's phone number?
- The practice phone number listed in the NPPES registry for William Harrer is (360) 839-8953.
- Does William Harrer accept Medicare?
- William Harrer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Harrer's NPI active?
- Yes — William Harrer's NPI (1972584217) is active in the NPPES registry as of the last update on 2023-10-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.