Karen Warburton, MD
NPI 1619902756 · Nephrology Physician · Charlottesville, VA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Warburton, MD is a Nephrology Physician provider in Charlottesville, VA (NPI 1619902756).
Provider details
- NPI number
- 1619902756
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD419924 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
122 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 44 | $138 |
| 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 | 43 | $16 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 35 | $72 |
Typical Medicare-allowed amounts for these services range $16–$138 (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 |
|---|---|---|
| Prednisone | 74 | 20 |
| Carvedilol | 56 | 16 |
| Tacrolimus | 37 | — |
| Amlodipine Besylate | 33 | — |
| Mycophenolate Mofetil | 25 | — |
| Losartan Potassium | 23 | — |
| Rosuvastatin Calcium | 18 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-11
- Last updated
- 2016-10-10
Frequently asked questions
- What is Karen Warburton's NPI number?
- Karen Warburton's National Provider Identifier (NPI) is 1619902756, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Warburton's specialty?
- Karen Warburton is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Warburton located?
- Karen Warburton's practice location on file with NPPES is 1300 Jefferson Park Ave, Charlottesville, VA 22903-3363.
- What is Karen Warburton's phone number?
- The practice phone number listed in the NPPES registry for Karen Warburton is (434) 924-1984.
- Does Karen Warburton accept Medicare?
- Karen Warburton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Warburton's NPI active?
- Yes — Karen Warburton's NPI (1619902756) is active in the NPPES registry as of the last update on 2016-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.