Dr. Alexandra O. Duffy, DO

  • Sacramento, CA
  • Neurologist
NPI1316212814PAC ID9830318773
Medicare services, 2024
672
Medicare patients, 2024
293
Part D claims, 2024
1,953
Publications
4
MIPS score, 2024
83
Practice address
2315 Stockton Boulevard, Sacramento, CA 95817
Practice phone
Call (916) 734-2011
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

UC Davis Medical Center

Hospital · Sacramento, California

See all 3 affiliations

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Dr. Alexandra O. Duffy is a neurologist in Sacramento, California

Dr. Duffy practices at UC Davis Medical Center in Sacramento, California, part of University of California Health.

Dr. Duffy's NPI, 1316212814, was assigned on March 15, 2012. Dr. Duffy graduated from Touro University California - Vallejo in 2010. Dr. Duffy holds California license 20A12176.

NPI and contact details
Medicare PAC ID
9830318773
NPI enumeration date
March 15, 2012
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(916) 734-2011
Professional email
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Personal email
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Mobile number
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Sex
Female
Estimated age
42
Medical school graduation
2010

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

Dr. Alexandra O. Duffy practices at UC Davis Medical Center in Sacramento, California

Dr. Duffy's primary practice is UC Davis Medical Center, at 2315 Stockton Boulevard, Sacramento, CA 95817 in Sacramento County. The practice phone is (916) 734-2011.

Source: Dmand AI Affiliation Data

Dr. Alexandra O. Duffy is affiliated with 2 sites of care and 1 medical group

Dr. Duffy's primary practice is UC Davis Medical Center in Sacramento, California, part of University of California Health. The medical group on file is UC Davis Medical Group. Dmand AI also links Dr. Duffy to 1 more group practice or clinic, named with a free account.

See all 3 affiliations for Dr. Duffy

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Alexandra O. Duffy's practice

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

EHR by site
SiteEHR vendor and product
UC Davis Medical CenterAvailable with a free account
+1 more affiliated siteAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Alexandra O. Duffy is one of 2,207 neurologists in California

Neurology is Dr. Duffy's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Duffy is board certified in neurology by the American Board of Psychiatry and Neurology. Dr. Duffy is licensed in California.

Specialties and state licenses

  • Neurology, CaliforniaPrimaryLicense 20A12176 · 2012 to 2027 · taxonomy 2084N0400X

Clinical focus

Dmand AI lists acute mini-stroke (TIA), epilepsy, essential tremor, lower back pain, migraine and chronic headache, mobility impairment, neck pain and spine problems and neuropathy among the conditions Dr. Duffy treats.

Neurologists near Dr. Duffy

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. Alexandra O. Duffy billed Medicare for 672 services in 2024

CMS data shows 672 Medicare services from Dr. Duffy across 7 procedure codes in 2024, for 293 Medicare patients. Medicare paid $37,094 for them.

Medicare services, 2024672
Medicare patients293
Paid by Medicare$37,094
Procedure codes7

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

  • 2023
  • 2024
Office and hospital visits
2023: 3962024: 4001%
Other services
2023: 372024: 272635%
Tests and treatments
2023: 452024: 0100%

Where Dr. Duffy's Medicare services took place, 2024

  • In an office61191%
  • In a facility619%

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

  • Dr. Duffy
  • California median
Medicare services
672vs 40466% above
Medicare patients
293vs 19054% above
Part D claims
1,795vs 3245.5 times

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

Dr. Duffy'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. Duffy

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Duffy and other neurologists in California.

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

Dr. Alexandra O. Duffy treated 293 Medicare patients in 2024, average age 71

CMS counts 293 Medicare patients who saw Dr. Duffy in 2024. The largest group is 65 to 74, with 108 patients. 65% of them have high cholesterol, and 57% have high blood pressure. 25% are also on Medicaid. Their average risk score is 1.55, 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. Duffy's median patient age at 65, with 49% women.

Medicare patients, 2024293
Average age71
Average risk score1.55
Also on Medicaid25%

Dr. Duffy's Medicare patients by age, 2024

Dr. Duffy's Medicare patients by sex, 2024

  • Women13446%
  • Men15954%

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

  1. High cholesterol65%
  2. High blood pressure57%
  3. Parkinson's disease49%
  4. Arthritis43%
  5. Mood disorders43%
  6. Depression41%
  7. Anxiety39%
  8. Diabetes21%

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

Dr. Duffy's patients across all payers

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

Patient panel by age, all payers

Median age 65

Patient panel by sex, all payers

  • Women49%
  • Men51%

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

Dr. Alexandra O. Duffy wrote 1,953 Medicare Part D claims in 2024

In 2024, Dr. Duffy wrote 1,953 Medicare Part D claims for 208 patients. 86% of them were for generic drugs. CMS names the drug for 1,795 of them, across 29 drugs with 11 or more claims each, at $1,074,891 in total drug cost. In 2023, CMS named 1,324 claims across 25 drugs.

Part D claims, 20241,953
Drugs named by CMS29
Total drug cost$1.1M
Part D patients208

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

  • Generic1,679 claims86%
  • Brand-name274 claims14%

Dr. Duffy'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.

Drug classes CMS tracks in Dr. Duffy's Part D claims, 2024

  • Antipsychotics, patients 65 and over6%115 of 1,953 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1,3242024: 1,79536%

Drugs named by CMS: 29 in 2024, 25 in 2023.

See all prescribing by Dr. Duffy

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. Alexandra O. Duffy scored 83 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Dr. Duffy for performance year 2024, reported as part of a group. Dr. Duffy accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Duffy as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Duffy's MIPS scores, performance year 2024

  • 83of 100Final score
  • 64.8of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 69of 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. Alexandra O. Duffy has 4 publications on record

Dmand AI links 4 papers to Dr. Duffy, published from 2016 to 2021. Dr. Duffy's most frequent co-authors are Vicki L. Wheelock, MD, David Philip Bissig, MD, PhD and Fredric Austin Gorin, MD.

Papers4
Years published2016 to 2021

Dr. Duffy's papers by year, 2016 to 2021

Dr. Duffy's most frequent co-authors

Recent publications by Dr. Duffy

See all 4 publications and co-authors

See who Dr. Duffy researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Duffy works with, so you can find a warm path to the right neurologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Alexandra O. Duffy received $221 in industry payments from 2017 to 2023

CMS Open Payments shows 4 general payments to Dr. Duffy from 3 drug and device companies from 2017 to 2023. Food and beverage make up the largest share, 100% of the total. Genentech, Inc. paid the most, $185.

General payments to Dr. Duffy by program year, 2017 to 2023

Companies that paid Dr. Duffy the most, 2017 to 2023

Share is of all general payments to this clinician.

See all payments to Dr. Duffy

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

Dr. Alexandra O. Duffy graduated from Touro University California - Vallejo

Dr. Duffy graduated from Touro University California - Vallejo in 2010.

  1. Medical schoolTouro University California - Vallejo
  2. Board certified in neurologyAmerican Board of Psychiatry and Neurology

Source: Dmand AI Professional Profile Data

Dr. Alexandra O. Duffy accepts plans from 9 insurance carriers

Dr. Duffy is in network with 9 carriers, including Aetna, Elevance and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • United Healthcare
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Regence Health Plans
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare
  • +1 more carriersWith a free account

Plan types Dr. Duffy accepts, by number of carriers

  1. Medicare7
  2. PPO6
  3. EPO3
  4. HMO3
  5. POS3
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Alexandra O. Duffy'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 phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy 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)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
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. Alexandra O. Duffy

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. Alexandra O. Duffy's NPI number?

Dr. Alexandra O. Duffy's NPI number is 1316212814. It was assigned on March 15, 2012, and it is active in the NPI Registry.

What kind of doctor is Dr. Alexandra O. Duffy?

Dr. Alexandra O. Duffy is a neurologist in Sacramento, California. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).

Where does Dr. Alexandra O. Duffy practice?

Dr. Duffy practices at 2315 Stockton Boulevard, Sacramento, CA 95817. Dr. Duffy's primary practice is UC Davis Medical Center in Sacramento, California, part of University of California Health. Dmand AI also links Dr. Duffy to 1 group practice or clinic.

What is Dr. Alexandra O. Duffy's office phone number?

The practice phone on file for Dr. Duffy is (916) 734-2011.

What is Dr. Alexandra O. Duffy's medical license number?

Dr. Duffy holds California license 20A12176.

Which hospitals is Dr. Alexandra O. Duffy affiliated with?

Dr. Duffy practices at UC Davis Medical Center in Sacramento, California.

What medical group is Dr. Alexandra O. Duffy part of?

Dr. Duffy is linked to UC Davis Medical Group.

Does Dr. Alexandra O. Duffy accept Medicare?

Yes. CMS data shows Dr. Duffy billed Medicare for 672 services in 2024, and Dr. Duffy accepts Medicare assignment.

Does Dr. Alexandra O. Duffy offer telehealth?

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

What is Dr. Alexandra O. Duffy's MIPS score?

Dr. Duffy's MIPS final score for performance year 2024 is 83 out of 100, reported as part of a group.

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. Alexandra O. Duffy see?

CMS counts 293 Medicare patients who saw Dr. Duffy in 2024, with an average age of 71.

Is Dr. Alexandra O. Duffy board certified?

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

What services does Dr. Alexandra O. Duffy bill to Medicare?

In 2024, Dr. Duffy's most billed Medicare services were medicare service (G2211), office visit, established patient (99215) and office visit, established patient (99214).

Where did Dr. Alexandra O. Duffy go to medical school?

Dr. Duffy graduated from Touro University California - Vallejo in 2010.

What drugs does Dr. Alexandra O. Duffy prescribe most?

In 2024 Medicare Part D data, Dr. Duffy's most prescribed drugs by claims were Carbidopa-Levodopa, Carbidopa-Levodopa ER and Sertraline HCl.

Has Dr. Alexandra O. Duffy received payments from drug or device companies?

CMS Open Payments shows $221 in general payments to Dr. Duffy from 3 companies from 2017 to 2023. The largest total came from Genentech, Inc.

How long has Dr. Alexandra O. Duffy been practicing?

Dr. Duffy graduated from medical school in 2010, 16 years ago.

Does Dr. Alexandra O. Duffy do research?

Dmand AI links 4 publications to Dr. Duffy, published from 2016 to 2021.

Who does Dr. Alexandra O. Duffy publish with?

Dr. Duffy's most frequent co-authors are Vicki L. Wheelock, MD (2 shared papers), David Philip Bissig, MD, PhD (1 shared paper) and Fredric Austin Gorin, MD (1 shared paper).

What insurance does Dr. Alexandra O. Duffy accept?

Dr. Duffy is in network with 9 carriers, including Aetna, Elevance and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.

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