Darwin-Dean Castillo, M.D.
NPI 1740507797 · Emergency Medicine Physician · Williamsburg, VA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Darwin-Dean Castillo, M.D. is a Emergency Medicine Physician provider in Williamsburg, VA (NPI 1740507797).
Provider details
- NPI number
- 1740507797
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 30537 (WV)
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
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
757 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 442 | $165 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 157 | $8 |
| Critical Care, First 30-74 Minutes99291 | 96 | $200 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 62 | $115 |
Typical Medicare-allowed amounts for these services range $8–$200 (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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 88 | 88 |
| Cephalexin | 43 | 42 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 28 | 28 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 17 | 17 |
| Azithromycin | 16 | 16 |
| Naproxen Sodium | 12 | 12 |
| Famotidine | 12 | 12 |
Practice location
Mailing address
Additional practice locations (2)
- 44045 Riverside PkwyLeesburg, VA 20176-5101Phone: (703) 858-6044Fax: (703) 858-6775
- 300 S Preston StRanson, WV 25438-1631Phone: (240) 686-2300
Registry dates
- Enumerated
- 2010-04-30
- Last updated
- 2025-03-10
- Certified
- 2025-03-10
Frequently asked questions
- What is Darwin-Dean Castillo's NPI number?
- Darwin-Dean Castillo's National Provider Identifier (NPI) is 1740507797, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Darwin-Dean Castillo's specialty?
- Darwin-Dean Castillo is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Darwin-Dean Castillo located?
- Darwin-Dean Castillo's practice location on file with NPPES is 4374 New Town Ave Ste 100, Williamsburg, VA 23188-2865.
- What is Darwin-Dean Castillo's phone number?
- The practice phone number listed in the NPPES registry for Darwin-Dean Castillo is (757) 772-6124.
- Does Darwin-Dean Castillo accept Medicare?
- Darwin-Dean Castillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Darwin-Dean Castillo's NPI active?
- Yes — Darwin-Dean Castillo's NPI (1740507797) is active in the NPPES registry as of the last update on 2025-03-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.