Frederick Santiago, M.D.
NPI 1538598412 · Internal Medicine Physician · Torrance, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frederick Santiago, M.D. is a Internal Medicine Physician provider in Torrance, CA (NPI 1538598412).
Provider details
- NPI number
- 1538598412
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A127558 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
97 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 80 | $123 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 17 | $120 |
Typical Medicare-allowed amounts for these services range $120–$123 (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 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 23 | 14 |
| Carvedilol | 22 | 17 |
| Hydralazine Hcl | 20 | 14 |
| Ondansetronbrand: Ondansetron Odt | 19 | 19 |
| Amlodipine Besylate | 18 | 13 |
| Furosemide | 18 | 17 |
| Metoprolol Succinate | 15 | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-11-01
- Last updated
- 2026-01-09
- Certified
- 2026-01-09
Frequently asked questions
- What is Frederick Santiago's NPI number?
- Frederick Santiago's National Provider Identifier (NPI) is 1538598412, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frederick Santiago's specialty?
- Frederick Santiago is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Frederick Santiago located?
- Frederick Santiago's practice location on file with NPPES is 3330 Lomita Blvd, Torrance, CA 90505-5002.
- What is Frederick Santiago's phone number?
- The practice phone number listed in the NPPES registry for Frederick Santiago is (310) 784-8770.
- Does Frederick Santiago accept Medicare?
- Frederick Santiago is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frederick Santiago's NPI active?
- Yes — Frederick Santiago's NPI (1538598412) is active in the NPPES registry as of the last update on 2026-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.