Catherine Deffendall, MD
NPI 1922531326 · Internal Medicine Physician · Nashville, TN
Catherine Deffendall, MD is a Internal Medicine Physician provider in Nashville, TN (NPI 1922531326).
Provider details
- NPI number
- 1922531326
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 63222 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 34 | 12 |
| Methotrexate Sodiumbrand: Methotrexate | 31 | — |
| Hydroxychloroquine Sulfate | 19 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 1215 21st Ave SSuite #6000 Medical Center East VumcNashville, TN 37232-8300Phone: (615) 936-8590Fax: (615) 936-1269
Registry dates
- Enumerated
- 2017-04-04
- Last updated
- 2021-05-17
- Certified
- 2021-05-17
Frequently asked questions
- What is Catherine Deffendall's NPI number?
- Catherine Deffendall's National Provider Identifier (NPI) is 1922531326, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Deffendall's specialty?
- Catherine Deffendall is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Deffendall located?
- Catherine Deffendall's practice location on file with NPPES is 3601 the Vanderbilt Clinic, Nashville, TN 37232-8300.
- What is Catherine Deffendall's phone number?
- The practice phone number listed in the NPPES registry for Catherine Deffendall is (615) 322-3000.
- Is Catherine Deffendall's NPI active?
- Yes — Catherine Deffendall's NPI (1922531326) is active in the NPPES registry as of the last update on 2021-05-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.