William Walker, MD
NPI 1700889904 · Pulmonary Disease Physician · Anderson, SC
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Walker, MD is a Pulmonary Disease Physician provider in Anderson, SC (NPI 1700889904).
Provider details
- NPI number
- 1700889904
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 7835 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 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
714 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 285 | $76 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 161 | $86 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 91 | $124 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 69 | $113 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 47 | $165 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 181 | 30 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 149 | 42 |
| Prednisone | 78 | 42 |
| Budesonide/Glycopyr/Formoterolbrand: Breztri Aerosphere | 67 | 18 |
| Azithromycin | 56 | 36 |
| Budesonide/Formoterol Fumaratebrand: Symbicort | 47 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$507 across 29 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
- 2005-05-23
- Last updated
- 2011-08-19
Frequently asked questions
- What is William Walker's NPI number?
- William Walker's National Provider Identifier (NPI) is 1700889904, 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 Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Walker located?
- William Walker's practice location on file with NPPES is 2000 East Greenville St, Anderson, SC 29621-1714.
- What is William Walker's phone number?
- The practice phone number listed in the NPPES registry for William Walker is (864) 225-5667.
- 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 (1700889904) is active in the NPPES registry as of the last update on 2011-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.