Daniel Castro, MD
NPI 1821002700 · Internal Medicine Physician · Morristown, TN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Daniel Castro, MD is a Internal Medicine Physician provider in Morristown, TN (NPI 1821002700).
Provider details
- NPI number
- 1821002700
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD0000056844 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
327 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) |
|---|---|---|
| Diabetes Outpatient Self-Management Training Services, Group Session (2 Or More), Per 30 MinutesG0109 | 125 | $14 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 68 | $83 |
| Complete Ultrasound Study of Arm and Leg Arteries93923 | 55 | $113 |
| Testing of Autonomic (sympathetic) Nervous System Function95923 | 27 | $110 |
| Testing of Autonomic (sympathetic and Parasympathetic) Nervous System Function, at Least 5 Minutes of Tilt95924 | 27 | $137 |
| Electrocardiogram (ecg) 1 to 3 Leads With Review By Physician93040 | 25 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 44 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Empagliflozinbrand: Jardiance | 170 | 69 |
| Metformin Hclbrand: Metformin Hcl Er | 136 | 67 |
| Insulin Degludecbrand: Tresiba Flextouch U-200 | 107 | 53 |
| Lisinopril | 90 | 43 |
| Semaglutidebrand: Ozempic | 84 | 35 |
| Atorvastatin Calcium | 63 | 35 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$204 across 10 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
- 2006-07-28
- Last updated
- 2023-10-10
- Certified
- 2023-10-10
Frequently asked questions
- What is Daniel Castro's NPI number?
- Daniel Castro's National Provider Identifier (NPI) is 1821002700, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Daniel Castro's specialty?
- Daniel Castro is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Daniel Castro located?
- Daniel Castro's practice location on file with NPPES is 2231 Sandstone Dr, Morristown, TN 37814-2593.
- What is Daniel Castro's phone number?
- The practice phone number listed in the NPPES registry for Daniel Castro is (423) 616-0625.
- Does Daniel Castro accept Medicare?
- Daniel Castro is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Daniel Castro's NPI active?
- Yes — Daniel Castro's NPI (1821002700) is active in the NPPES registry as of the last update on 2023-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.