Samuel Walker, DO
NPI 1144727579 · Hospitalist Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Samuel Walker, DO is a Hospitalist Physician provider in Knoxville, TN (NPI 1144727579).
Provider details
- NPI number
- 1144727579
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 4139 (TN)
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
8 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
475 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 50 Minutes99233 | 238 | $112 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 112 | $75 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 75 | $108 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 36 | $165 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians andG0180 | 14 | $51 |
Typical Medicare-allowed amounts for these services range $51–$165 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 24 | 24 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 21 | — |
| Pantoprazole Sodium | 20 | 15 |
| Prednisone | 17 | 17 |
| Carvedilol | 15 | 11 |
| Rosuvastatin Calcium | 15 | — |
| Doxycycline Monohydrate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$259 across 12 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
- 2018-04-11
- Last updated
- 2021-07-15
- Certified
- 2021-07-15
Frequently asked questions
- What is Samuel Walker's NPI number?
- Samuel Walker's National Provider Identifier (NPI) is 1144727579, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Samuel Walker's specialty?
- Samuel Walker is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Samuel Walker located?
- Samuel Walker's practice location on file with NPPES is 1924 Alcoa Hwy # U56, Knoxville, TN 37920-1511.
- What is Samuel Walker's phone number?
- The practice phone number listed in the NPPES registry for Samuel Walker is (865) 305-9081.
- Does Samuel Walker accept Medicare?
- Samuel Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Samuel Walker's NPI active?
- Yes — Samuel Walker's NPI (1144727579) is active in the NPPES registry as of the last update on 2021-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.