Gustavo Marks, M.D.
NPI 1740373315 · Family Medicine Physician · Canoga Park, CA
Gustavo Marks, M.D. is a Family Medicine Physician provider in Canoga Park, CA (NPI 1740373315).
Provider details
- NPI number
- 1740373315
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A54483 (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
19 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
708 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) |
|---|---|---|
| Chronic Care Management Services for Two Or More Chronic Conditions, First 30 Minutes Provided Personally By Health Care Professional, Per Calendar Month99491 | 255 | $90 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 140 | $138 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 53 | $98 |
| Ultrasound Study of Arm and Leg Arteries93922 | 52 | $94 |
| Principal Care Management Services for a Single High-Risk Disease, First 30 Minutes Provided Personally By Qualified Health Care Professional, Per Calendar Month.99424 | 45 | $87 |
| Ultrasound Scan of Abdominal Aorta |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 67 | 25 |
| Levothyroxine Sodium | 64 | 22 |
| Alprazolam | 62 | 23 |
| Losartan Potassium | 50 | 20 |
| Omeprazole | 47 | 17 |
| Amlodipine Besylate | 34 | 14 |
| Montelukast Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$36 across 2 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
- 2006-10-02
- Last updated
- 2012-12-21
Frequently asked questions
- What is Gustavo Marks's NPI number?
- Gustavo Marks's National Provider Identifier (NPI) is 1740373315, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gustavo Marks's specialty?
- Gustavo Marks is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gustavo Marks located?
- Gustavo Marks's practice location on file with NPPES is 22030 Sherman Way Ste 318, Canoga Park, CA 91303-1886.
- What is Gustavo Marks's phone number?
- The practice phone number listed in the NPPES registry for Gustavo Marks is (818) 999-5900.
- Is Gustavo Marks's NPI active?
- Yes — Gustavo Marks's NPI (1740373315) is active in the NPPES registry as of the last update on 2012-12-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.