Aaron Iwanyczko, P.A.
Surgical Physician Assistant · Davis, CA
Aaron Iwanyczko, P.A. is a surgical physician assistant with a practice address in Davis, California, and NPI 1093781288, issued on Feb 27, 2006. Check the license (California PA14977, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Aaron Iwanyczko
- Credential
- P.A.
- Primary taxonomy
- Surgical Physician Assistant 363AS0400X
- License number
- PA14977 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2031 Anderson RD, Davis, CA 95616
- Phone
- (530) 757-3700
- Enumerated
- Feb 27, 2006
- Record last updated
- Jan 3, 2022
- Fax
- (530) 756-6907
- Medicare enrollment
- Enrolled (PECOS I20070615000451); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgical physician assistant records → All 1,075 in California → Look up another NPI →
Also registered at 2031 Anderson RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Barry, M.D.Orthopaedic Surgery of the Spine Physician1285600478
- Theodore Coates, PA-CSurgical Physician Assistant1821018557
Verify Aaron Iwanyczko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA14977Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average surgical physician assistant in 2024
131 Medicare Part D claims for 77 beneficiaries, against an average of 304 among the 10,174 providers of this specialty who prescribed in Part D. 72 claims were for opioids.
Most prescribed
- Oxycodone Hcl26 claims
- Ondansetron Odt22 claims
- Hydrocodone-Acetaminophen20 claims
- Tramadol Hcl13 claims
- Ibuprofen12 claims
- Oxycodone-Acetaminophen12 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
- Permanente Medical Group IncVallejo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Iwanyczko among 1,075 surgical physician assistant records in California
Aaron Iwanyczko, P.A. is one of 1,075 surgical physician assistant records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 74% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1999 · median 2012 among the 649 with a school on file
- Record last updated2022 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AS0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Physician Assistant providers in California
There are 1,075 surgical physician assistant records in California.
All 1,075 in California → Every provider in Davis → Surgical Physician Assistant nationwide →
The 8 surgical physician assistant records with the nearest ZIP codes
- Theodore Coates, PA-CDavis, CA 956161821018557
- Erin Audrain, P.A.Carmichael, CA 956081598713943
- Dennis Balough, PA-CCarmichael, CA 956081508200452
- John Miles, PA-CCarmichael, CA 956081598896953
- Jeannine O'Brien, PA-CCarmichael, CA 956081598879793
- Linnea Renwick, PA-CCarmichael, CA 956081235916800
- Jonathan Sanz, PA-CCarmichael, CA 956081902273485
- Connor O'KeefeFolsom, CA 956301851083430
Common questions
What is Aaron Iwanyczko, P.A.'s NPI number?
Aaron Iwanyczko, P.A.'s National Provider Identifier (NPI) is 1093781288, issued on Feb 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Iwanyczko, P.A. located?
The NPPES record lists a practice address at 2031 Anderson RD, Davis, CA, 95616. Phone: (530) 757-3700. Providers update this record themselves, so call before visiting.
How can I verify Aaron Iwanyczko, P.A.'s license?
NPPES lists California license number PA14977, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Aaron Iwanyczko, P.A. prescribe under Medicare Part D?
In 2024, Aaron Iwanyczko, P.A. had 131 Medicare Part D claims for 77 beneficiaries; the average among surgical physician assistant prescribers was 304. 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.