Sydney Guenther, FNP-C
Family Nurse Practitioner · Buckeye, AZ
Sydney Guenther, FNP-C is a family nurse practitioner with a practice address in Buckeye, Arizona, and NPI 1093442725, issued on Aug 3, 2022. Check the license (Arizona 228428, as entered in NPPES) with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sydney Guenther
- Credential
- FNP-C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 228428 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 20751 W Market St, Buckeye, AZ 85396
- Phone
- (623) 463-5000
- Enumerated
- Aug 3, 2022
- Record last updated
- Sep 10, 2025
- Medicare enrollment
- Enrolled (PECOS I20250528001411); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 5,933 in Arizona → Look up another NPI →
Also registered at 20751 W Market St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Esther Burns, FNPFamily Nurse Practitioner1053840926
- Jungwuk Han, MDInternal Medicine Physician1003546771
- Randi Herman, FNP-CFamily Nurse Practitioner1962947770
- Asta Jakobsson, DOFamily Medicine Physician1427685973
- Rommel Mesola, M.D.Adult Medicine Physician1104979269
- Shannon Packard, FNPFamily Nurse Practitioner1043827769
Verify Sydney Guenther in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license 228428Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average family nurse practitioner in 2024
542 Medicare Part D claims for 147 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 48 claims were for opioids.
Most prescribed
- Tramadol Hcl23 claims
- Cyclobenzaprine Hcl21 claims
- Azithromycin20 claims
- Prednisone20 claims
- Levothyroxine Sodium19 claims
- Ondansetron Odt19 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.
Industry payments in 2024: $79.23
5 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Banner Primary Care Physicians Arizona LLCBuckeye, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sydney Guenther among 5,933 family nurse practitioner records in Arizona
Sydney Guenther, FNP-C is one of 5,933 family nurse practitioner records with a practice address in Arizona. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 73% of them.
- NPI issued2022 · 73% of these records are older, 21% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2022 · median 2019 among the 3,510 with a school on file
- Record last updated2025 · 38% 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 Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
30 family nurse practitioner records list a practice address in Buckeye
They are 30 of the 489 NPPES records with a practice address in Buckeye, and 5,933 family nurse practitioner records in Arizona.
All 5,933 in Arizona → Every provider in Buckeye → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Maria Arndt, NPBuckeye, AZ 853961053401323
- Douglas Bishop, NPBuckeye, AZ 853961548840937
- Sara Brandal, APNBuckeye, AZ 853961053799940
- Esther Burns, FNPBuckeye, AZ 853961053840926
- Marci Hageman, FNPBuckeye, AZ 853961861071532
- Randi Herman, FNP-CBuckeye, AZ 853961962947770
- Victoria McBerty, FNP-BCBuckeye, AZ 853961124816079
- Shannon Packard, FNPBuckeye, AZ 853961043827769
Common questions
What is Sydney Guenther, FNP-C's NPI number?
Sydney Guenther, FNP-C's National Provider Identifier (NPI) is 1093442725, issued on Aug 3, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Sydney Guenther, FNP-C located?
The NPPES record lists a practice address at 20751 W Market St, Buckeye, AZ, 85396. Phone: (623) 463-5000. Providers update this record themselves, so call before visiting.
How can I verify Sydney Guenther, FNP-C's license?
NPPES lists Arizona license number 228428, as entered by the provider. Search the Arizona board that licenses this profession; the NPPES record confirms identity only.
How much does Sydney Guenther, FNP-C prescribe under Medicare Part D?
In 2024, Sydney Guenther, FNP-C had 542 Medicare Part D claims for 147 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.