Calla Walters, MD
NPI 1659900918 · Family Medicine Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Calla Walters, MD is a Family Medicine Physician provider in Knoxville, TN (NPI 1659900918).
Provider details
- NPI number
- 1659900918
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 67908 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
6 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
226 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 62 | $83 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 50 | $116 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 29 | $73 |
| 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 | 27 | $15 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 25 | $119 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 106 | 37 |
| Atorvastatin Calcium | 41 | 15 |
| Rosuvastatin Calcium | 37 | 16 |
| Semaglutidebrand: Ozempic | 34 | — |
| Alprazolam | 33 | — |
| Mirtazapine | 29 | — |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-04-07
- Last updated
- 2023-08-16
- Certified
- 2023-08-16
Frequently asked questions
- What is Calla Walters's NPI number?
- Calla Walters's National Provider Identifier (NPI) is 1659900918, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Calla Walters's specialty?
- Calla Walters is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Calla Walters located?
- Calla Walters's practice location on file with NPPES is 1924 Alcoa Hwy # U-67, Knoxville, TN 37920-1511.
- What is Calla Walters's phone number?
- The practice phone number listed in the NPPES registry for Calla Walters is (865) 305-9350.
- Does Calla Walters accept Medicare?
- Calla Walters is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Calla Walters's NPI active?
- Yes — Calla Walters's NPI (1659900918) is active in the NPPES registry as of the last update on 2023-08-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.