Eric Williamson, MD
Neurology Physician · Los Angeles, CA
Eric Williamson, MD is a neurology physician with a practice address in Los Angeles, California, and NPI 1861719742, issued on Apr 30, 2010. Check the license (California A118441, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Eric Williamson
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License numbers
- A118441 CA
MD450965 PA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Medical Plaza # B200, Los Angeles, CA 90095
- Phone
- (310) 794-1195
- Enumerated
- Apr 30, 2010
- Record last updated
- Aug 3, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20121003000426); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Also registered at 300 Medical Plaza # B200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Timothy Chang, M.D., PH.D.Neurology Physician1710383146
- Eric Cheng, MD, MSNeurology Physician1629170477
- Inna Keselman, M.D., PH.DNeurology Physician1003075037
- Leila Parand, MDNeurology Physician1174927594
- Shital Pavawalla, PH.D.Clinical Neuropsychologist1336400357
- Ranmal Samarasinghe, M.D., PH.D.Neurology Physician1588906606
Verify Eric Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A118441Check 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 neurology physician in 2024
261 Medicare Part D claims for 41 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Baclofen58 claims
- Dalfampridine Er32 claims
- Amantadine14 claims
- Vumerity14 claims
- Betaseron13 claims
- Gabapentin11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 88 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,701.11
3 payments; by number, the most common kind was consulting fee; the largest payer was TG Therapeutics, Inc. The 10,858 providers of this specialty with any payment received $8,318.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eric Williamson among 2,339 neurology physician records in California
Eric Williamson, 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 2010, is newer than 61% of them.
- NPI issued2010 · 61% of these records are older, 36% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2007 · median 2006 among the 1,628 with a school on file
- Record last updated2018 · 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 Los Angeles → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- David Alexander, M.D.Los Angeles, CA 900951154371334
- Robert Baloh, MDLos Angeles, CA 900951801811252
- Ronnie Bergen, MDLos Angeles, CA 900951750353488
- Timothy Cloughesy, MDLos Angeles, CA 900951154356053
- Robert Collins, MDLos Angeles, CA 900951871518233
- Jeffrey Cummings, MDLos Angeles, CA 900951457376329
- Dawn Eliashiv, M.D.Los Angeles, CA 900951144286162
- Neeta Garg, MDLos Angeles, CA 900951649242728
Common questions
What is Eric Williamson, MD's NPI number?
Eric Williamson, MD's National Provider Identifier (NPI) is 1861719742, issued on Apr 30, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Eric Williamson, MD located?
The NPPES record lists a practice address at 300 Medical Plaza # B200, Los Angeles, CA, 90095. Phone: (310) 794-1195. Providers update this record themselves, so call before visiting.
How can I verify Eric Williamson, MD's license?
NPPES lists California license number A118441, 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 Eric Williamson, MD prescribe under Medicare Part D?
In 2024, Eric Williamson, MD had 261 Medicare Part D claims for 41 beneficiaries; the average among neurology physician prescribers was 1,370. Part D covers Medicare prescriptions only.
What is Eric Williamson, MD's MIPS final score?
The 2023 MIPS final score is 88 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.