Libbey A. Michelini, PA
Medical Physician Assistant · Gilroy, CA
Libbey A. Michelini, PA is a medical physician assistant with a practice address in Gilroy, California, and NPI 1144514860, issued on May 31, 2011. Check the license (California PA21441, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Libbey A. Michelini
- Credential
- PA
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA21441 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1123 Apache CT, Gilroy, CA 95020
- Phone
- (408) 848-3987
- Enumerated
- May 31, 2011
- Record last updated
- Mar 7, 2023
- Medicare enrollment
- Enrolled (PECOS I20140214000615); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Verify Libbey A. Michelini in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA21441Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average medical physician assistant in 2024
82 Medicare Part D claims for 53 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 44 claims were for opioids.
Most prescribed
- Oxycodone Hcl44 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): 80.6 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).
Bills Medicare through one group practice
- County OF Santa ClaraSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Libbey A. Michelini among 3,376 medical physician assistant records in California
Libbey A. Michelini, PA is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 46% of them.
- NPI issued2011 · 46% of these records are older, 49% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2011 · median 2012 among the 1,347 with a school on file
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California.
All 3,376 in California → Every provider in Gilroy → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- John BarbaraGilroy, CA 950201972882546
- Asma Dahir, PAGilroy, CA 950201689353633
- Stuart Macdonell, PA-CFreedom, CA 950191407814247
- Philip Gosvener, PA-CHollister, CA 950231508837675
- Ray Kusumoto, PAHollister, CA 950231194850800
- Elizabeth Bradbury, PA-CCapitola, CA 950101700259181
- Michael Bordner, PA-CLos Gatos, CA 950321275827511
- Deborah Brown, PA-CLos Gatos, CA 950321093802340
Common questions
What is Libbey A. Michelini, PA's NPI number?
Libbey A. Michelini, PA's National Provider Identifier (NPI) is 1144514860, issued on May 31, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Libbey A. Michelini, PA located?
The NPPES record lists a practice address at 1123 Apache CT, Gilroy, CA, 95020. Phone: (408) 848-3987. Providers update this record themselves, so call before visiting.
How can I verify Libbey A. Michelini, PA's license?
NPPES lists California license number PA21441, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Libbey A. Michelini, PA prescribe under Medicare Part D?
In 2024, Libbey A. Michelini, PA had 82 Medicare Part D claims for 53 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is Libbey A. Michelini, PA's MIPS final score?
The 2023 MIPS final score is 80.6 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.