Gerardo Trejo, M.D., M.H.S.
NPI 1932545423 · Family Medicine Physician · Norwalk, CT
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gerardo Trejo, M.D., M.H.S. is a Family Medicine Physician provider in Norwalk, CT (NPI 1932545423).
Provider details
- NPI number
- 1932545423
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., M.H.S.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 324744 (NY)
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
13 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
493 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 | 134 | $132 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 104 | $91 |
| 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 | 58 | $17 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 46 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 34 | $7 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 55 | 24 |
| Escitalopram Oxalate | 41 | — |
| Valsartan | 40 | 12 |
| Atorvastatin Calcium | 40 | 19 |
| Lisinopril | 38 | 12 |
| Rosuvastatin Calcium | 36 | 13 |
| Pantoprazole Sodium |
Practice location
Mailing address
Additional practice locations (1)
- 1281 E Main StStamford, CT 06902-3544Phone: (203) 210-2875Fax: (203) 210-2861
Registry dates
- Enumerated
- 2013-05-11
- Last updated
- 2024-02-29
- Certified
- 2023-10-10
Frequently asked questions
- What is Gerardo Trejo's NPI number?
- Gerardo Trejo's National Provider Identifier (NPI) is 1932545423, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerardo Trejo's specialty?
- Gerardo Trejo is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gerardo Trejo located?
- Gerardo Trejo's practice location on file with NPPES is 542 Westport Ave, Norwalk, CT 06851-4431.
- What is Gerardo Trejo's phone number?
- The practice phone number listed in the NPPES registry for Gerardo Trejo is (203) 845-4800.
- Does Gerardo Trejo accept Medicare?
- Gerardo Trejo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gerardo Trejo's NPI active?
- Yes — Gerardo Trejo's NPI (1932545423) is active in the NPPES registry as of the last update on 2024-02-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.