Caleb Warren, M.D.
NPI 1801861786 · Family Medicine Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Caleb Warren, M.D. is a Family Medicine Physician provider in Knoxville, TN (NPI 1801861786).
Provider details
- NPI number
- 1801861786
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD028800 (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
20 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
1,054 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 262 | $116 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 188 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 141 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 126 | $13 |
| Hemoglobin A1c Level83036 | 87 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 84 | $83 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 162 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 507 | 100 |
| Atorvastatin Calcium | 478 | 142 |
| Omeprazole | 411 | 116 |
| Levothyroxine Sodium | 342 | 95 |
| Meloxicam | 280 | 95 |
| Amlodipine Besylate | 252 | 76 |
| Metoprolol Succinate | 226 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-22
- Last updated
- 2020-06-22
- Certified
- 2020-06-22
Frequently asked questions
- What is Caleb Warren's NPI number?
- Caleb Warren's National Provider Identifier (NPI) is 1801861786, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Caleb Warren's specialty?
- Caleb Warren is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Caleb Warren located?
- Caleb Warren's practice location on file with NPPES is 3403 Tazewell Pike, Knoxville, TN 37918-2620.
- What is Caleb Warren's phone number?
- The practice phone number listed in the NPPES registry for Caleb Warren is (865) 689-9966.
- Does Caleb Warren accept Medicare?
- Caleb Warren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Caleb Warren's NPI active?
- Yes — Caleb Warren's NPI (1801861786) is active in the NPPES registry as of the last update on 2020-06-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.