Izabella S. Isaac, MD
Neurology Physician · Riverside, CA
Izabella S. Isaac, MD is a neurology physician with a practice address in Riverside, California, and NPI 1164570040, issued on Jan 8, 2007. Check the license (California A61473, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Izabella S. Isaac
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- A61473 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10800 Magnolia Ave, Riverside, CA 92505
- Phone
- (909) 353-2000
- Enumerated
- Jan 8, 2007
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Also registered at 10800 Magnolia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Maria Aguirre, MDPediatrics Physician1295806255
Verify Izabella S. Isaac in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A61473Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average neurology physician in 2024
327 Medicare Part D claims for 63 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims. 16 claims were for opioids.
Most prescribed
- Sumatriptan Succinate36 claims
- Qulipta25 claims
- Ubrelvy24 claims
- Levetiracetam22 claims
- Nurtec Odt18 claims
- Butalbital-Acetaminophen-Caffe16 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.
Izabella S. Isaac among 2,339 neurology physician records in California
Izabella S. Isaac, MD is one of 2,339 neurology 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 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 48% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2021 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
All 2,339 in California → Every provider in Riverside → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Kwing-Wah Chan, MDRiverside, CA 925051922175736
- Shawn Higuchi, M.D.Riverside, CA 925051447200449
- Esther Hsiao, MDRiverside, CA 925051912228370
- Arindra Jayasekara, M.D..Riverside, CA 925051710565932
- Sameh Labib, MDRiverside, CA 925051982771705
- Jorge Lipiz, MDRiverside, CA 925051316006067
- Shadi Milani-Nejad, D.O.Riverside, CA 925051780048769
- Ross Pender, M.D.Riverside, CA 925051396988226
Common questions
What is Izabella S. Isaac, MD's NPI number?
Izabella S. Isaac, MD's National Provider Identifier (NPI) is 1164570040, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Izabella S. Isaac, MD located?
The NPPES record lists a practice address at 10800 Magnolia Ave, Riverside, CA, 92505. Phone: (909) 353-2000. Providers update this record themselves, so call before visiting.
How can I verify Izabella S. Isaac, MD's license?
NPPES lists California license number A61473, 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 Izabella S. Isaac, MD prescribe under Medicare Part D?
In 2024, Izabella S. Isaac, MD had 327 Medicare Part D claims for 63 beneficiaries; the average among neurology physician prescribers was 1,370. 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.