Marissa Castro Fernandez Kiemele, MD
Family Medicine Physician · San Rafael, CA
Marissa Castro Fernandez Kiemele, MD is a family medicine physician with a practice address in San Rafael, California, and NPI 1144297516, issued on Mar 3, 2006. Check the license (California C192860, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marissa Castro Fernandez Kiemele
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- C192860 CA
292453 MA
18726 NH
Self-reported in NPPES; status is on the state search - Practice location
- 4000 Civic Center Dr Ste 200B, San Rafael, CA 94903
- Phone
- (415) 492-3333
- Enumerated
- Mar 3, 2006
- Record last updated
- Jul 1, 2026
- Fax
- (415) 492-3425
- Medicare enrollment
- Enrolled (PECOS I20260521000769); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 4000 Civic Center Dr Ste 200B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danielle Balestra, PAPhysician Assistant1780308890
- Ekta Patel, PA-CPhysician Assistant1811502545
Verify Marissa Castro Fernandez Kiemele in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C192860Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average family medicine physician in 2024
664 Medicare Part D claims for 219 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 37 claims were for opioids.
Most prescribed
- Atorvastatin Calcium54 claims
- Lisinopril40 claims
- Amlodipine Besylate35 claims
- Levothyroxine Sodium25 claims
- Oxycodone Hcl23 claims
- Hydrochlorothiazide22 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
- Greater New Bedford Community Health Center IncNew Bedford, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marissa Castro Fernandez Kiemele among 17,133 family medicine physician records in California
Marissa Castro Fernandez Kiemele, MD 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 fileYes · 62% of these records are
- Graduated1995 · median 2005 among the 10,652 with a school on file
- Record last updated2026 · 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).
37 family medicine physician records list a practice address in San Rafael
They are 37 of the 3,159 NPPES records with a practice address in San Rafael, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Rafael → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Charles Calza, M.D.San Rafael, CA 949031629081161
- John Clothier, M.D.San Rafael, CA 949031750431250
- Orna Hananel, MDSan Rafael, CA 949031497839484
- Ann Hathaway, MDSan Rafael, CA 949031093893752
- Brian Hertz, MDSan Rafael, CA 949031831273812
- Meenal Lohtia, M.D.San Rafael, CA 949031205883121
- Sarah Mansell, MDSan Rafael, CA 949031548332364
- Drew MarisSan Rafael, CA 949031467538397
Common questions
What is Marissa Castro Fernandez Kiemele, MD's NPI number?
Marissa Castro Fernandez Kiemele, MD's National Provider Identifier (NPI) is 1144297516, issued on Mar 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marissa Castro Fernandez Kiemele, MD located?
The NPPES record lists a practice address at 4000 Civic Center Dr Ste 200B, San Rafael, CA, 94903. Phone: (415) 492-3333. Providers update this record themselves, so call before visiting.
How can I verify Marissa Castro Fernandez Kiemele, MD's license?
NPPES lists California license number C192860, 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 Marissa Castro Fernandez Kiemele, MD prescribe under Medicare Part D?
In 2024, Marissa Castro Fernandez Kiemele, MD had 664 Medicare Part D claims for 219 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.