Larry Walker, M.D.
NPI 1538140587 · Nephrology Physician · Huntsville, AL
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Larry Walker, M.D. is a Nephrology Physician provider in Huntsville, AL (NPI 1538140587).
Provider details
- NPI number
- 1538140587
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 21290 (AL)
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
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
3,096 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 | 858 | $72 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 534 | $96 |
| 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 | 457 | $15 |
| Hemodialysis Procedure With Physician Evaluation90935 | 244 | $65 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 227 | $321 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 105 | 39 |
| Furosemide | 100 | 41 |
| Losartan Potassium | 86 | 32 |
| Hydralazine Hcl | 44 | 21 |
| Hydrochlorothiazide | 37 | 17 |
| Lisinopril | 32 | 15 |
| Calcitriol | 30 | 15 |
| Carvedilol |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$283 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
- 2005-11-08
- Last updated
- 2020-08-11
- Certified
- 2020-08-11
Frequently asked questions
- What is Larry Walker's NPI number?
- Larry Walker's National Provider Identifier (NPI) is 1538140587, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Larry Walker's specialty?
- Larry Walker is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Larry Walker located?
- Larry Walker's practice location on file with NPPES is 810 Franklin St Se, Huntsville, AL 35801-4310.
- What is Larry Walker's phone number?
- The practice phone number listed in the NPPES registry for Larry Walker is (256) 881-1160.
- Does Larry Walker accept Medicare?
- Larry Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Larry Walker's NPI active?
- Yes — Larry Walker's NPI (1538140587) is active in the NPPES registry as of the last update on 2020-08-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.