Cynthia Castillo, M.D.
NPI 1457671018 · Internal Medicine Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cynthia Castillo, M.D. is a Internal Medicine Physician provider in San Antonio, TX (NPI 1457671018).
Provider details
- NPI number
- 1457671018
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- P6150 (TX)
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 tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
339 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 157 | $123 |
| 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 | 110 | $16 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 41 | $124 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 17 | $173 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 14 | $160 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 148 | 60 |
| Levothyroxine Sodium | 99 | 42 |
| Lisinopril | 85 | 36 |
| Rosuvastatin Calcium | 73 | 32 |
| Montelukast Sodium | 72 | 29 |
| Metformin Hcl | 64 | 26 |
| Omeprazole |
Practice location
Mailing address
Additional practice locations (1)
- 2833 Babcock Rd Ste 203San Antonio, TX 78229-4894Phone: (210) 705-5100
Registry dates
- Enumerated
- 2010-06-07
- Last updated
- 2023-01-25
- Certified
- 2023-01-25
Frequently asked questions
- What is Cynthia Castillo's NPI number?
- Cynthia Castillo's National Provider Identifier (NPI) is 1457671018, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cynthia Castillo's specialty?
- Cynthia Castillo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Cynthia Castillo located?
- Cynthia Castillo's practice location on file with NPPES is 4502 Medical Dr, San Antonio, TX 78229-4402.
- What is Cynthia Castillo's phone number?
- The practice phone number listed in the NPPES registry for Cynthia Castillo is (210) 358-4000.
- Does Cynthia Castillo accept Medicare?
- Cynthia Castillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cynthia Castillo's NPI active?
- Yes — Cynthia Castillo's NPI (1457671018) is active in the NPPES registry as of the last update on 2023-01-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.