Alexandra Duffy, D.O.
Neurology Physician · Sacramento, CA
Alexandra Duffy, D.O. is a neurology physician with a practice address in Sacramento, California, and NPI 1316212814, issued on Mar 15, 2012. Check the license (California 20A12176, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexandra Duffy
- Credential
- D.O.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- 20A12176 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4860 Y St, Sacramento, CA 95817
- Phone
- (916) 703-5078
- Enumerated
- Mar 15, 2012
- Record last updated
- Mar 15, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140908002602); accepts Medicare assignment
- 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 4860 Y St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alexandra Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A12176Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% more Medicare Part D claims than the average neurology physician in 2024
1,953 Medicare Part D claims for 208 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Carbidopa-Levodopa520 claims
- Carbidopa-Levodopa Er244 claims
- Sertraline Hcl141 claims
- Olanzapine99 claims
- Austedo90 claims
- Rytary62 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 one group practice
- Regents OF The Univ OF CASacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexandra Duffy among 2,339 neurology physician records in California
Alexandra Duffy, D.O. 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 2012, is newer than 66% of them.
- NPI issued2012 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2010 · median 2006 among the 1,628 with a school on file
- Record last updated2012 · 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 Sacramento → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Steven Brass, MDSacramento, CA 958171548250848
- Lawrence Fung, M.D.Sacramento, CA 958171407837164
- Fredric Gorin, M.D.Sacramento, CA 958171629052220
- Shawn Kile, M.D.Sacramento, CA 958171831170844
- Jane Kim, M.D.Sacramento, CA 958171871574772
- Suzanne Koopmans, M.D.Sacramento, CA 958171891776688
- Neuzil Lai, M.D.Sacramento, CA 958171265413736
- Calandra Lindsey, D.O.Sacramento, CA 958171245211184
Common questions
What is Alexandra Duffy, D.O.'s NPI number?
Alexandra Duffy, D.O.'s National Provider Identifier (NPI) is 1316212814, issued on Mar 15, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Alexandra Duffy, D.O. located?
The NPPES record lists a practice address at 4860 Y St, Sacramento, CA, 95817. Phone: (916) 703-5078. Providers update this record themselves, so call before visiting.
How can I verify Alexandra Duffy, D.O.'s license?
NPPES lists California license number 20A12176, 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 Alexandra Duffy, D.O. prescribe under Medicare Part D?
In 2024, Alexandra Duffy, D.O. had 1,953 Medicare Part D claims for 208 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.