Alison Nielsen, MD
Physician Assistant · Mather, CA
Alison Nielsen, MD is a physician assistant with a practice address in Mather, California, and NPI 1265536213, issued on Sep 11, 2006. Check the license (California A120218, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Alison Nielsen
- Credential
- MD
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- A120218 CA
003526 GA
Self-reported in NPPES; status is on the state search - Practice location
- 10535 Hospital Way, Mather, CA 95655
- Phone
- (916) 843-7102
- Enumerated
- Sep 11, 2006
- Entity
- Type 1 · individual
Also registered at 10535 Hospital Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sarah AliPharmacist1851871503
- Shelby Alley, DPMFoot & Ankle Surgery Podiatrist1588928790
- Chibuzo Anyama, APRN PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1841059912
Verify Alison Nielsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license A120218Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
The practice group's Medicare quality score for 2023: 61.2 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).
One hospital or facility affiliation
- Permanente Medical Group IncSacramento, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Physician Assistant providers in California
There are 13,861 physician assistant records in California.
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Common questions
What is Alison Nielsen, MD's NPI number?
Alison Nielsen, MD's National Provider Identifier (NPI) is 1265536213, issued on Sep 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alison Nielsen, MD located?
The NPPES record lists a practice address at 10535 Hospital Way, Mather, CA, 95655. Phone: (916) 843-7102. Providers update this record themselves, so call before visiting.
How can I verify Alison Nielsen, MD's license?
NPPES lists California license number A120218, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
What is Alison Nielsen, MD's Medicare quality score?
The 2023 MIPS final score is 61.2 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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.