William Walker, NP
NPI 1487640033 · Family Nurse Practitioner · Washington, IN
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Walker, NP is a Family Nurse Practitioner provider in Washington, IN (NPI 1487640033).
Provider details
- NPI number
- 1487640033
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Male
- Sole proprietor
- No
- License
- 71001830A (IN)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
114 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 | 85 | $71 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 29 | $60 |
Typical Medicare-allowed amounts for these services range $60–$71 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$132 across 6 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
Additional practice locations (3)
- 901 Saint Marys Dr Ste 300Evansville, IN 47714-0521Phone: (812) 473-2642
- 1900 Saint Charles StJasper, IN 47546-9145Phone: (812) 634-1211Fax: (812) 634-9762
- 421 E Van Trees StWashington, IN 47501-2948Phone: (812) 254-2663Fax: (812) 257-7075
Registry dates
- Enumerated
- 2005-09-20
- Last updated
- 2024-06-27
- Certified
- 2024-06-27
Frequently asked questions
- What is William Walker's NPI number?
- William Walker's National Provider Identifier (NPI) is 1487640033, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Walker's specialty?
- William Walker is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Walker located?
- William Walker's practice location on file with NPPES is 1314 E Walnut St, Washington, IN 47501-2860.
- What is William Walker's phone number?
- The practice phone number listed in the NPPES registry for William Walker is (812) 473-2642.
- Does William Walker accept Medicare?
- William Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Walker's NPI active?
- Yes — William Walker's NPI (1487640033) is active in the NPPES registry as of the last update on 2024-06-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.