Guiselle Clark, M.D.
Hospitalist Physician · Santa Monica, CA
Guiselle Clark, M.D. is a hospitalist physician with a practice address in Santa Monica, California, and NPI 1124254024, issued on Jun 5, 2009. Check the license (California A114924, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Guiselle Clark
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A114924 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1225 15TH St, Santa Monica, CA 90404
- Phone
- (310) 319-4598
- Enumerated
- Jun 5, 2009
- Record last updated
- Nov 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (310) 319-4908
- Medicaid ID
- 1124254024 CA
- Medicare enrollment
- Enrolled (PECOS I20120531000538); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 1225 15TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patrick Bui, M.D.Hospitalist Physician1619278108
- Erin Dowling, M.D.Hospitalist Physician1568645901
- Uzma Khan, M.D.Internal Medicine Physician1194989418
- Cristina KimFamily Nurse Practitioner1649679952
- Elaine Parker, M.D.Internal Medicine Physician1093902454
- Gabriela Priklerova, RNRegistered Nurse1629909965
Verify Guiselle Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A114924Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% fewer Medicare Part D claims than the average hospitalist physician in 2024
502 Medicare Part D claims for 171 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
Most prescribed
- Bupropion Hcl Sr44 claims
- Furosemide40 claims
- Metformin Hcl Er26 claims
- Lisinopril21 claims
- Pradaxa18 claims
- Atorvastatin Calcium16 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupBaldwin Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Guiselle Clark among 3,099 hospitalist physician records in California
Guiselle Clark, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 39% of them.
- NPI issued2009 · 39% of these records are older, 56% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2009 · median 2010 among the 2,505 with a school on file
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
96 hospitalist physician records list a practice address in Santa Monica
They are 96 of the 5,151 NPPES records with a practice address in Santa Monica, and 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Santa Monica → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Spencer Adams, MDSanta Monica, CA 904041487688198
- Nathan Cox, M.D.Santa Monica, CA 904041912173378
- Erin Dowling, M.D.Santa Monica, CA 904041568645901
- Retha GoodglickSanta Monica, CA 904041396994034
- Adela Greeley, M.D.Santa Monica, CA 904041205968492
- David Kagan, MDSanta Monica, CA 904041992965768
- Russell KerbelSanta Monica, CA 904041164699203
- Mike La, M.D.Santa Monica, CA 904041790949535
Common questions
What is Guiselle Clark, M.D.'s NPI number?
Guiselle Clark, M.D.'s National Provider Identifier (NPI) is 1124254024, issued on Jun 5, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Guiselle Clark, M.D. located?
The NPPES record lists a practice address at 1225 15TH St, Santa Monica, CA, 90404. Phone: (310) 319-4598. Providers update this record themselves, so call before visiting.
How can I verify Guiselle Clark, M.D.'s license?
NPPES lists California license number A114924, 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 Guiselle Clark, M.D. prescribe under Medicare Part D?
In 2024, Guiselle Clark, M.D. had 502 Medicare Part D claims for 171 beneficiaries; the average among hospitalist physician prescribers was 521. 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.