Jonathan Randall Willms, D.O.
Obstetrics & Gynecology Physician · Casa Grande, AZ
Jonathan Randall Willms, D.O. is an obstetrics & gynecology physician with a practice address in Casa Grande, Arizona, and NPI 1891010658, issued on Apr 5, 2010. Check the license (Arizona 006349, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Jonathan Randall Willms
- Credential
- D.O.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 006349 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 580 N Camino Mercado Ste 8, Casa Grande, AZ 85122
- Phone
- (520) 381-0380
- Enumerated
- Apr 5, 2010
- Record last updated
- Dec 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (520) 836-1826
- Medicaid ID
- 901786 AZ
- Medicare enrollment
- Enrolled (PECOS I20140728002044); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 803 in Arizona → Look up another NPI →
Also registered at 580 N Camino Mercado Ste 8
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melissa Andersson, CNMAdvanced Practice Midwife1003706987
- Genessis Cardenas, CNMAdvanced Practice Midwife1437863172
- Kerrie Decastro, CNMAdvanced Practice Midwife1275358525
- Eddie Estrada, M.D.Obstetrics & Gynecology Physician1386782472
- Sean GarciaPhysician Assistant1295406361
- Sarah Huson, PA-CPhysician Assistant1760073605
Verify Jonathan Randall Willms in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 006349Check 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 obstetrics & gynecology physician in 2024
41 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Progesterone11 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: $533.71
27 payments; by number, the most common kind was food and beverage; the largest payer was Caldera Medical, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Sun Life Family Health Center IncCasa Grande, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan Randall Willms among 803 obstetrics & gynecology physician records in Arizona
Jonathan Randall Willms, D.O. is one of 803 obstetrics & gynecology physician records with a practice address in Arizona. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 67% of them.
- NPI issued2010 · 67% of these records are older, 30% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2010 · median 2005 among the 477 with a school on file
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 obstetrics & gynecology physician records list a practice address in Casa Grande
They are 12 of the 867 NPPES records with a practice address in Casa Grande, and 803 obstetrics & gynecology physician records in Arizona.
All 803 in Arizona → Every provider in Casa Grande → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Carl Bronitsky, M.D.Casa Grande, AZ 851221487618658
- Lashonda Carlton, MDCasa Grande, AZ 851221649563412
- Eddie Estrada, M.D.Casa Grande, AZ 851221386782472
- Precious GaddisCasa Grande, AZ 851221235592270
- Jillian Lundie, MDCasa Grande, AZ 851221720584279
- Virginia Savala, D.O.Casa Grande, AZ 851221992935894
- Jaime Testa, MDCasa Grande, AZ 851221164544730
- Douglas Weber, M.D.Casa Grande, AZ 851221992933550
Common questions
What is Jonathan Randall Willms, D.O.'s NPI number?
Jonathan Randall Willms, D.O.'s National Provider Identifier (NPI) is 1891010658, issued on Apr 5, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Randall Willms, D.O. located?
The NPPES record lists a practice address at 580 N Camino Mercado Ste 8, Casa Grande, AZ, 85122. Phone: (520) 381-0380. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Randall Willms, D.O.'s license?
NPPES lists Arizona license number 006349, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jonathan Randall Willms, D.O. prescribe under Medicare Part D?
In 2024, Jonathan Randall Willms, D.O. had 41 Medicare Part D claims; the average among obstetrics & gynecology physician prescribers was 165. 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.