Marisa Look
Emergency Medicine Physician · Fontana, CA
Marisa Look is an emergency medicine physician with a practice address in Fontana, California, and NPI 1346694593, issued on Apr 13, 2016. Check the license (California FL8002735, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marisa Look
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- FL8002735 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9961 Sierra Ave, Fontana, CA 92335
- Phone
- (909) 441-6664
- Enumerated
- Apr 13, 2016
- Record last updated
- Mar 20, 2025
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 9961 Sierra Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michael Adair, MDFamily Medicine Physician1780732651
- Berneva Adams, MDObstetrics & Gynecology Physician1376602987
Verify Marisa Look in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license FL8002735Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average emergency medicine physician in 2024
184 Medicare Part D claims for 125 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 15 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass16 claims
- Cephalexin15 claims
- Hydrocodone-Acetaminophen13 claims
- Ondansetron Odt11 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.
Marisa Look among 7,751 emergency medicine physician records in California
Marisa Look is one of 7,751 emergency 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 2016, is newer than 75% of them.
- NPI issued2016 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
55 emergency medicine physician records list a practice address in Fontana
They are 55 of the 3,012 NPPES records with a practice address in Fontana, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Fontana → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Pierre Assaf, MDFontana, CA 923351417969973
- Greg Capestany, MDFontana, CA 923351134277007
- Pushkar Chand, M.D.Fontana, CA 923351013074582
- Jonathan Chock, MDFontana, CA 923351770650624
- Karita Goulbourne, MDFontana, CA 923351619044500
- Charlene Jung, MDFontana, CA 923351346398146
- Shant Kalanjian, MDFontana, CA 923351942377841
- Ronald Lugo, MDFontana, CA 923351972670883
Common questions
What is Marisa Look's NPI number?
Marisa Look's National Provider Identifier (NPI) is 1346694593, issued on Apr 13, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Marisa Look located?
The NPPES record lists a practice address at 9961 Sierra Ave, Fontana, CA, 92335. Phone: (909) 441-6664. Providers update this record themselves, so call before visiting.
How can I verify Marisa Look's license?
NPPES lists California license number FL8002735, 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 Marisa Look prescribe under Medicare Part D?
In 2024, Marisa Look had 184 Medicare Part D claims for 125 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.