Sierra Alexis Mazzarella, CRNP
Family Nurse Practitioner · West Chester, PA
Sierra Alexis Mazzarella, CRNP is a family nurse practitioner with a practice address in West Chester, Pennsylvania, and NPI 1588431381, issued on Dec 11, 2023. Check the license (Pennsylvania SP028771, as entered in NPPES) with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sierra Alexis Mazzarella
- Credential
- CRNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- SP028771 PA
Self-reported in NPPES; status is on the state search - Practice location
- 510 E Gay St, West Chester, PA 19380
- Phone
- (484) 999-0204
- Enumerated
- Dec 11, 2023
- Record last updated
- Dec 11, 2023
- Medicare enrollment
- Enrolled (PECOS I20240116000044); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 7,209 in Pennsylvania → Look up another NPI →
Verify Sierra Alexis Mazzarella in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license SP028771Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average family nurse practitioner in 2024
323 Medicare Part D claims for 242 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Azithromycin42 claims
- Amoxicillin-Clavulanate Potass35 claims
- Cefdinir25 claims
- Methylprednisolone22 claims
- Nitrofurantoin Mono-Macro21 claims
- Doxycycline Hyclate18 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
- Pennsylvania Urgent Care Centers, PLLCWest Chester, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sierra Alexis Mazzarella among 7,209 family nurse practitioner records in Pennsylvania
Sierra Alexis Mazzarella, CRNP is one of 7,209 family nurse practitioner records with a practice address in Pennsylvania. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 79% of them.
- NPI issued2023 · 79% of these records are older, 14% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2023 · median 2018 among the 4,232 with a school on file
- Record last updated2023 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
50 family nurse practitioner records list a practice address in West Chester
They are 50 of the 2,831 NPPES records with a practice address in West Chester, and 7,209 family nurse practitioner records in Pennsylvania.
All 7,209 in Pennsylvania → Every provider in West Chester → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Catherine Aulenbach, CRNPWest Chester, PA 193801649310137
- Amanda Cabrera, CRNP, FNP-CWest Chester, PA 193801942717319
- Meg Garelick, CRNPWest Chester, PA 193801326407065
- Barbara Guenst, CRNPWest Chester, PA 193801083734305
- Roberta Humble, NP-CWest Chester, PA 193801376991638
- Lauri Landi, FNP-CWest Chester, PA 193801508385170
- Heather Levinsky, CNPWest Chester, PA 193801528567120
- Candace Mazzio, CRNPWest Chester, PA 193801801115084
Common questions
What is Sierra Alexis Mazzarella, CRNP's NPI number?
Sierra Alexis Mazzarella, CRNP's National Provider Identifier (NPI) is 1588431381, issued on Dec 11, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Sierra Alexis Mazzarella, CRNP located?
The NPPES record lists a practice address at 510 E Gay St, West Chester, PA, 19380. Phone: (484) 999-0204. Providers update this record themselves, so call before visiting.
How can I verify Sierra Alexis Mazzarella, CRNP's license?
NPPES lists Pennsylvania license number SP028771, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
How much does Sierra Alexis Mazzarella, CRNP prescribe under Medicare Part D?
In 2024, Sierra Alexis Mazzarella, CRNP had 323 Medicare Part D claims for 242 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.