Mary Walker, APN
NPI 1023051067 · Family Nurse Practitioner · Madisonville, TN
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Walker, APN is a Family Nurse Practitioner provider in Madisonville, TN (NPI 1023051067).
Provider details
- NPI number
- 1023051067
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APN
- Sex
- Female
- Sole proprietor
- Yes
- License
- 5417 (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
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
626 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) |
|---|---|---|
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 261 | $100 |
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 160 | $60 |
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 142 | $145 |
| Prolonged Home Or Residence Evaluation and Management Service(s) Beyond the Total Time for the Primary Service (when the Primary Service Has Been Selected Using Time on the Date of the Primary Service); Each Additional 15 Minutes By the Physician Or QualifG0318 | 29 | $24 |
| Advance Care Planning, First 30 Minutes99497 | 20 | $64 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 105 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Mirtazapine | 379 | 51 |
| Potassium Chloride | 261 | 37 |
| Escitalopram Oxalate | 253 | 30 |
| Levothyroxine Sodium | 241 | 36 |
| Donepezil Hcl | 227 | 32 |
| Losartan Potassium | 226 | 31 |
| Furosemide | 222 | 39 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$705 across 28 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
- 2006-06-14
- Last updated
- 2013-04-11
Frequently asked questions
- What is Mary Walker's NPI number?
- Mary Walker's National Provider Identifier (NPI) is 1023051067, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Walker's specialty?
- Mary Walker is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Walker located?
- Mary Walker's practice location on file with NPPES is 465 Isbill Rd, Madisonville, TN 37354-2112.
- What is Mary Walker's phone number?
- The practice phone number listed in the NPPES registry for Mary Walker is (865) 335-0330.
- Does Mary Walker accept Medicare?
- Mary Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Walker's NPI active?
- Yes — Mary Walker's NPI (1023051067) is active in the NPPES registry as of the last update on 2013-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.