Roman Castillo, M.D.
NPI 1811344583 · Internal Medicine Physician · Dallas, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Roman Castillo, M.D. is a Internal Medicine Physician provider in Dallas, TX (NPI 1811344583).
Provider details
- NPI number
- 1811344583
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- S2253 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 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
40 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 26 | $127 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 14 | $9 |
Typical Medicare-allowed amounts for these services range $9–$127 (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 · 84 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 303 | 181 |
| Rosuvastatin Calcium | 277 | 161 |
| Metformin Hcl | 213 | 120 |
| Gabapentin | 184 | 105 |
| Amlodipine Besylate | 175 | 99 |
| Lisinopril | 159 | 93 |
| Pantoprazole Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$49 across 2 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
- 2016-05-23
- Last updated
- 2024-07-01
- Certified
- 2024-07-01
Frequently asked questions
- What is Roman Castillo's NPI number?
- Roman Castillo's National Provider Identifier (NPI) is 1811344583, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Roman Castillo's specialty?
- Roman Castillo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Roman Castillo located?
- Roman Castillo's practice location on file with NPPES is 2121 S Buckner Blvd Ste 100, Dallas, TX 75227-8602.
- What is Roman Castillo's phone number?
- The practice phone number listed in the NPPES registry for Roman Castillo is (214) 381-1187.
- Does Roman Castillo accept Medicare?
- Roman Castillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Roman Castillo's NPI active?
- Yes — Roman Castillo's NPI (1811344583) is active in the NPPES registry as of the last update on 2024-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.