Gustavo Marks, M.D.
Family Medicine Physician · Canoga Park, CA
Gustavo Marks, M.D. is a family medicine physician with a practice address in Canoga Park, California, and NPI 1740373315, issued on Oct 2, 2006. Check the license (California A54483, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gustavo Marks
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A54483 CA
Self-reported in NPPES; status is on the state search - Practice location
- 22030 Sherman Way Ste 318, Canoga Park, CA 91303
- Phone
- (818) 999-5900
- Enumerated
- Oct 2, 2006
- Record last updated
- Dec 21, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (818) 999-5901
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Gustavo Marks in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A54483Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average family medicine physician in 2024
1,348 Medicare Part D claims for 102 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Atorvastatin Calcium67 claims
- Levothyroxine Sodium64 claims
- Alprazolam62 claims
- Losartan Potassium50 claims
- Omeprazole47 claims
- Amlodipine Besylate34 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $35.58
2 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Gustavo Marks among 17,133 family medicine physician records in California
Gustavo Marks, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2012 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Canoga Park → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Fernando Aguirre, M.D.Canoga Park, CA 913031235234873
- Tuan Nguyen, MDCanoga Park, CA 913031073607446
- Rosalinda Roy, M.D.Canoga Park, CA 913031821021981
- Kathleen Anderson, MDCalabasas, CA 913021629029996
- Stephen Axelrode, D.O.Calabasas, CA 913021871694398
- Amineh El-GhaliCanoga Park, CA 913041326543265
- Robert Feher, M.D.Calabasas, CA 913021962437202
- Sharon Macaluso, M.D.Calabasas, CA 913021174964894
Common questions
What is Gustavo Marks, M.D.'s NPI number?
Gustavo Marks, M.D.'s National Provider Identifier (NPI) is 1740373315, issued on Oct 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gustavo Marks, M.D. located?
The NPPES record lists a practice address at 22030 Sherman Way Ste 318, Canoga Park, CA, 91303. Phone: (818) 999-5900. Providers update this record themselves, so call before visiting.
How can I verify Gustavo Marks, M.D.'s license?
NPPES lists California license number A54483, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gustavo Marks, M.D. prescribe under Medicare Part D?
In 2024, Gustavo Marks, M.D. had 1,348 Medicare Part D claims for 102 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.