Gustavo Alza, MD
NPI 1942498464 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gustavo Alza, MD is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1942498464).
Provider details
- NPI number
- 1942498464
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G48749 (CA)
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
18 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
1,365 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 | 703 | $147 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 152 | $9 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 103 | $65 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 92 | $23 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 74 | $203 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 79 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 208 | 57 |
| Quetiapine Fumarate | 181 | 36 |
| Trazodone Hcl | 176 | 38 |
| Pioglitazone Hcl | 159 | 43 |
| Levothyroxine Sodium | 155 | 32 |
| Empagliflozinbrand: Jardiance | 152 | 30 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$999 across 14 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
- 2007-10-10
- Last updated
- 2007-12-03
Frequently asked questions
- What is Gustavo Alza's NPI number?
- Gustavo Alza's National Provider Identifier (NPI) is 1942498464, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gustavo Alza's specialty?
- Gustavo Alza is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gustavo Alza located?
- Gustavo Alza's practice location on file with NPPES is 5224 N Figueroa Street, Los Angeles, CA 90042-4118.
- What is Gustavo Alza's phone number?
- The practice phone number listed in the NPPES registry for Gustavo Alza is (323) 259-0456.
- Does Gustavo Alza accept Medicare?
- Gustavo Alza is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gustavo Alza's NPI active?
- Yes — Gustavo Alza's NPI (1942498464) is active in the NPPES registry as of the last update on 2007-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.