Dr. Eric Michaellee Williamson, MD

  • Los Angeles, CA
  • Neurologist
NPI1861719742PAC ID0941459127
Medicare services, 2024
39
Medicare patients, 2024
35
Part D claims, 2024
261
MIPS score, 2024
94
Hospital affiliations
1
Practice address
200 Medical Plz, Los Angeles, CA 90024
Practice phone
Call (310) 794-9206
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Peter Morton UCLA Medical Building

Los Angeles, California

See all 4 affiliations

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Dr. Eric Michaellee Williamson is a neurologist in Los Angeles, California

Dr. Williamson practices at Peter Morton UCLA Medical Building in Los Angeles, California.

Dr. Williamson's NPI, 1861719742, was assigned on April 30, 2010. Dr. Williamson graduated from Ohio State College of Medicine in 2007. Dr. Williamson holds California license A118441.

NPI and contact details
Medicare PAC ID
0941459127
NPI enumeration date
April 30, 2010
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(310) 794-9206
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
45
Medical school graduation
2007

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Eric Michaellee Williamson practices at Peter Morton UCLA Medical Building in Los Angeles, California

Dr. Williamson's primary practice is Peter Morton UCLA Medical Building, at 200 Medical Plz, Los Angeles, CA 90024 in Los Angeles County. The practice phone is (310) 794-9206.

  • Peter Morton UCLA Medical Building
    200 Medical Plz, Los Angeles, CA 90024 · Los Angeles CountyPhone(310) 794-9206

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Eric Michaellee Williamson is affiliated with 3 sites of care and 1 medical group

Dr. Williamson's primary practice is Peter Morton UCLA Medical Building in Los Angeles, California. Dr. Williamson is also affiliated with Ronald Reagan UCLA Medical Center. The medical group on file is UCLA Neurology. Dmand AI also links Dr. Williamson to 1 more group practice or clinic, named with a free account.

See all 4 affiliations for Dr. Williamson

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Eric Michaellee Williamson's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williamson practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Peter Morton UCLA Medical BuildingAvailable with a free account
+2 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Eric Michaellee Williamson is one of 2,207 neurologists in California

Neurology is Dr. Williamson's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Williamson is board certified in neurology by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Williamson's licenses on file in 4 states: California, Pennsylvania, Illinois and Ohio.

Specialties and state licenses

  • Neurology, CaliforniaPrimaryLicense A118441 · 2011 to 2026 · taxonomy 2084N0400X
  • Pennsylvania licenseLicense MD450965 · 2014 to 2018
  • Illinois license2008 to 2011
  • Ohio license2007 to 2008

Clinical focus

Dmand AI lists multiple sclerosis among the conditions Dr. Williamson treats.

Neurologists near Dr. Williamson

Counts of neurologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Eric Michaellee Williamson billed Medicare for 39 services in 2024

CMS data shows 39 Medicare services from Dr. Williamson across 2 procedure codes in 2024, all of them office visits, for 35 Medicare patients. Medicare paid $5,370 for them. Every service was in an office.

Medicare services, 202439
Medicare patients35
Paid by Medicare$5,370
Procedure codes2

Dr. Williamson's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 392024: 39No change

Dr. Williamson compared with the California median for neurologists, 2024

  • Dr. Williamson
  • California median
Medicare services
39vs 40490% below
Medicare patients
35vs 19082% below
Part D claims
142vs 32456% below

Medians across 1,995 neurologists in California with Dmand AI profiles that report each measure.

Dr. Williamson's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Williamson

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Eric Michaellee Williamson treated 35 Medicare patients in 2024, average age 61

CMS counts 35 Medicare patients who saw Dr. Williamson in 2024. The largest group is under 65, with 18 patients. 63% of them have high cholesterol, and 51% have arthritis. 40% are also on Medicaid. Their average risk score is 1.89, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Williamson's median patient age at 50, with 70% women.

Medicare patients, 202435
Average age61
Average risk score1.89
Also on Medicaid40%

Dr. Williamson's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Chronic conditions among Dr. Williamson's Medicare patients, 2024

  1. High cholesterol63%
  2. Arthritis51%
  3. High blood pressure49%
  4. Depression46%
  5. Mood disorders46%
  6. Anxiety37%

Share of Medicare patients with each condition. A patient can have several.

Dr. Williamson's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 50

Patient panel by sex, all payers

  • Women70%
  • Men28%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Eric Michaellee Williamson wrote 261 Medicare Part D claims in 2024

In 2024, Dr. Williamson wrote 261 Medicare Part D claims for 41 patients. 84% of them were for generic drugs. CMS names the drug for 142 of them, across 6 drugs with 11 or more claims each, at $271,770 in total drug cost. In 2023, CMS named 136 claims across 7 drugs.

Part D claims, 2024261
Drugs named by CMS6
Total drug cost$271,770
Part D patients41

Dr. Williamson's Part D claims by kind of drug, 2024

  • Generic219 claims84%
  • Brand-name42 claims16%

Dr. Williamson's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1362024: 1424%

Drugs named by CMS: 6 in 2024, 7 in 2023.

See all prescribing by Dr. Williamson

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Eric Michaellee Williamson scored 94 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 94 out of 100 for Dr. Williamson for performance year 2024, reported as part of a group. Dr. Williamson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Williamson as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Williamson's MIPS scores, performance year 2024

  • 94of 100Final score
  • 86.4of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 67of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Eric Michaellee Williamson received $116,837 in industry payments from 2016 to 2025

CMS Open Payments shows 226 general payments to Dr. Williamson from 15 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 68% of the total. EMD Serono, Inc. paid the most, $54,918.

General payments to Dr. Williamson by program year, 2016 to 2025

General payments to Dr. Williamson by kind, 2016 to 2025

$116.8Kin total
  • Consulting fees$79,32468%
  • Travel and lodging$14,20612%
  • Food and beverage$8,2247%
  • Honoraria$7,2456%
  • Other$7,8377%

Companies that paid Dr. Williamson the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Williamson

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Eric Michaellee Williamson graduated from Ohio State College of Medicine

Dr. Williamson graduated from Ohio State College of Medicine in 2007.

  1. Medical schoolOhio State College of Medicine
  2. Board certified in neurologyAmerican Board of Psychiatry and Neurology

Source: Dmand AI Professional Profile Data

Dr. Eric Michaellee Williamson accepts plans from 9 insurance carriers

Dr. Williamson is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Regence Health Plans
  • Amerihealth Caritas
  • CMS Medicare
  • DE State Medicaid
  • +1 more carriersWith a free account

Plan types Dr. Williamson accepts, by number of carriers

  1. Medicare8
  2. PPO5
  3. HMO2
  4. POS2
  5. EPO1
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Eric Michaellee Williamson's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Eric Michaellee Williamson

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Eric Michaellee Williamson's NPI number?

Dr. Eric Michaellee Williamson's NPI number is 1861719742. It was assigned on April 30, 2010, and it is active in the NPI Registry.

What kind of doctor is Dr. Eric Michaellee Williamson?

Dr. Eric Michaellee Williamson is a neurologist in Los Angeles, California. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).

Where does Dr. Eric Michaellee Williamson practice?

Dr. Williamson practices at 200 Medical Plz, Los Angeles, CA 90024. Dr. Williamson's primary practice is Peter Morton UCLA Medical Building in Los Angeles, California. Dmand AI also links Dr. Williamson to 1 group practice or clinic.

What is Dr. Eric Michaellee Williamson's office phone number?

The practice phone on file for Dr. Williamson is (310) 794-9206.

What is Dr. Eric Michaellee Williamson's medical license number?

Dr. Williamson holds California license A118441, one of the licenses on file in 4 states.

Which states has Dr. Eric Michaellee Williamson been licensed in?

Dmand AI has state licenses on file for Dr. Williamson in California (2011 to 2026), Pennsylvania (2014 to 2018), Illinois (2008 to 2011) and Ohio (2007 to 2008).

Which hospitals is Dr. Eric Michaellee Williamson affiliated with?

Dr. Williamson is affiliated with Ronald Reagan UCLA Medical Center.

What medical group is Dr. Eric Michaellee Williamson part of?

Dr. Williamson is linked to UCLA Neurology.

Does Dr. Eric Michaellee Williamson accept Medicare?

Yes. CMS data shows Dr. Williamson billed Medicare for 39 services in 2024, and Dr. Williamson accepts Medicare assignment.

Does Dr. Eric Michaellee Williamson offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Williamson as offering telehealth services.

Show 9 more questionsShow fewer questions

What is Dr. Eric Michaellee Williamson's MIPS score?

Dr. Williamson's MIPS final score for performance year 2024 is 94 out of 100, reported as part of a group.

How many Medicare patients does Dr. Eric Michaellee Williamson see?

CMS counts 35 Medicare patients who saw Dr. Williamson in 2024, with an average age of 61.

Is Dr. Eric Michaellee Williamson board certified?

Yes. Dr. Williamson is board certified in neurology by the American Board of Psychiatry and Neurology.

What services does Dr. Eric Michaellee Williamson bill to Medicare?

In 2024, Dr. Williamson's most billed Medicare services were office visit, established patient (99215) and office visit, established patient (99214).

Where did Dr. Eric Michaellee Williamson go to medical school?

Dr. Williamson graduated from Ohio State College of Medicine in 2007.

What drugs does Dr. Eric Michaellee Williamson prescribe most?

In 2024 Medicare Part D data, Dr. Williamson's most prescribed drugs by claims were Baclofen, Dalfampridine ER and Amantadine.

Has Dr. Eric Michaellee Williamson received payments from drug or device companies?

CMS Open Payments shows $116,837 in general payments to Dr. Williamson from 15 companies from 2016 to 2025. The largest total came from EMD Serono, Inc.

How long has Dr. Eric Michaellee Williamson been practicing?

Dr. Williamson graduated from medical school in 2007, 19 years ago.

What insurance does Dr. Eric Michaellee Williamson accept?

Dr. Williamson is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

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