Allison Walker, AG-ACNP
NPI 1700259421 · Acute Care Nurse Practitioner · Nashville, TN
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allison Walker, AG-ACNP is a Acute Care Nurse Practitioner provider in Nashville, TN (NPI 1700259421).
Provider details
- NPI number
- 1700259421
- Entity type
- Individual
- Primary specialty
- Acute Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- AG-ACNP
- Sex
- Female
- Sole proprietor
- No
- License
- 20641 (TN)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
468 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 228 | $79 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 195 | $54 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 45 | $118 |
Typical Medicare-allowed amounts for these services range $54–$118 (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.
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 |
|---|---|---|
| Letrozole | 252 | 87 |
| Tamoxifen Citrate | 90 | 32 |
| Exemestane | 77 | 24 |
| Anastrozole | 65 | 20 |
| Fezolinetantbrand: Veozah | 36 | — |
| Duloxetine Hcl | 17 | — |
| Gabapentin | 16 | — |
| Palbociclibbrand: Ibrance |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$202 across 2 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 (1)
- 691 Preston BuildingNashville, TN 37232-6838Phone: (615) 322-5000
Registry dates
- Enumerated
- 2015-11-03
- Last updated
- 2022-03-15
- Certified
- 2022-03-15
Frequently asked questions
- What is Allison Walker's NPI number?
- Allison Walker's National Provider Identifier (NPI) is 1700259421, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allison Walker's specialty?
- Allison Walker is listed in the NPPES registry with a primary specialty of Acute Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Allison Walker located?
- Allison Walker's practice location on file with NPPES is 3601 Th Vanderbilt Clinic, Nashville, TN 37232-6838.
- What is Allison Walker's phone number?
- The practice phone number listed in the NPPES registry for Allison Walker is (615) 936-2000.
- Does Allison Walker accept Medicare?
- Allison Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allison Walker's NPI active?
- Yes — Allison Walker's NPI (1700259421) is active in the NPPES registry as of the last update on 2022-03-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.