Katie L. Marks, M.D.
Internal Medicine Physician · Culver City, CA
Katie L. Marks, M.D. is an internal medicine physician with a practice address in Culver City, California, and NPI 1154596047, issued on Apr 23, 2008. Check the license (California A116095, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katie L. Marks
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A116095 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3831 Hughes Ave Ste 600A, Culver City, CA 90232
- Phone
- (424) 603-4544
- Enumerated
- Apr 23, 2008
- Record last updated
- Oct 29, 2024
- Fax
- (424) 603-4546
- Medicare enrollment
- Enrolled (PECOS I20110926000439); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2005
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Katie L. Marks in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A116095Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
137 Medicare Part D claims for 32 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Breyna12 claims
- Famotidine12 claims
- Xhance11 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: $934.20
36 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme Corporation. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Katie L. Marks among 17,696 internal medicine physician records in California
Katie L. Marks, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2005 · median 2004 among the 11,065 with a school on file
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Culver City → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Esther AhnCulver City, CA 902321023375847
- Pedram Kohan, M.D.Culver City, CA 902321710392840
- Mary Norman, M.D.Culver City, CA 902321811002454
- Leslie Paul, M.D.Culver City, CA 902321366509499
- Chandana Potaraju, MDCulver City, CA 902321326501909
- Camille RainerCulver City, CA 902321629657168
- Ashkan Sefaradi, M.D.Culver City, CA 902321861802548
- Steven Witlin, M.D.Culver City, CA 902321841340452
Common questions
What is Katie L. Marks, M.D.'s NPI number?
Katie L. Marks, M.D.'s National Provider Identifier (NPI) is 1154596047, issued on Apr 23, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Katie L. Marks, M.D. located?
The NPPES record lists a practice address at 3831 Hughes Ave Ste 600A, Culver City, CA, 90232. Phone: (424) 603-4544. Providers update this record themselves, so call before visiting.
How can I verify Katie L. Marks, M.D.'s license?
NPPES lists California license number A116095, 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 Katie L. Marks, M.D. prescribe under Medicare Part D?
In 2024, Katie L. Marks, M.D. had 137 Medicare Part D claims for 32 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.