Hollis Raquel London, D.O.
Emergency Medicine Physician · Fairfield, CA
Hollis Raquel London, D.O. is an emergency medicine physician with a practice address in Fairfield, California, and NPI 1538456165, issued on Jul 4, 2011. Check the license (California 20A14426, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Hollis Raquel London
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 20A14426 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1200 B Gale Wilson Blvd, Fairfield, CA 94533
- Phone
- (707) 646-5000
- Enumerated
- Jul 4, 2011
- Record last updated
- Jun 24, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160506000679); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1200 B Gale Wilson Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yusuf Ahmad, MDAnesthesiology Physician1104020262
- Tashira AlexanderRegistered Dietitian1902732480
- Nail Amro, M.D.Internal Medicine Physician1861413551
- Allan Au, M.D.Hospitalist Physician1427495563
- Erin Berntsen, ACNPAcute Care Nurse Practitioner1205640489
- Neeta BhasinCritical Care Pharmacist1457984882
Verify Hollis Raquel London in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A14426Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average emergency medicine physician in 2024
110 Medicare Part D claims for 62 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Cephalexin13 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.
Bills Medicare through 2 group practices
- Northbay Health Medical FoundationFairfield, CA
- Northbay Physicians Surgery Center, LLCFairfield, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hollis Raquel London among 7,751 emergency medicine physician records in California
Hollis Raquel London, D.O. 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 2011, is newer than 60% of them.
- NPI issued2011 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2011 · median 2011 among the 4,560 with a school on file
- Record last updated2016 · 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).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Fairfield → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- William Ankney, M.D.Fairfield, CA 945331760419824
- David Dennis, M.D.Fairfield, CA 945331730116799
- Caesar Djavaherian, M.D.Fairfield, CA 945331790760551
- David Ehrenfeld, M.D.Fairfield, CA 945331417051830
- Steven Garcia, MDFairfield, CA 945331376868323
- Julie Hersk, M.D.Fairfield, CA 945331023114030
- Toshi Hiraoka, M.D.Fairfield, CA 945331467489427
- Gary Hollinger, PA-CFairfield, CA 945331598868705
Common questions
What is Hollis Raquel London, D.O.'s NPI number?
Hollis Raquel London, D.O.'s National Provider Identifier (NPI) is 1538456165, issued on Jul 4, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Hollis Raquel London, D.O. located?
The NPPES record lists a practice address at 1200 B Gale Wilson Blvd, Fairfield, CA, 94533. Phone: (707) 646-5000. Providers update this record themselves, so call before visiting.
How can I verify Hollis Raquel London, D.O.'s license?
NPPES lists California license number 20A14426, 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 Hollis Raquel London, D.O. prescribe under Medicare Part D?
In 2024, Hollis Raquel London, D.O. had 110 Medicare Part D claims for 62 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.