Quick answers
- Where does Jonathan R. Willms see patients?
- Medicare's clinician data lists 4 practice locations, including Casa Grande, AZ and Chandler, AZ. Call before your visit to confirm the address.
- What is Jonathan R. Willms's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Jonathan R. Willms accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathan R. Willms accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Jonathan R. Willms?
- (520) 836-5036, as listed in official Medicare / NPI Registry data.
- What is Jonathan R. Willms's NPI number?
- 1891010658. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Jonathan R. Willms is enrolled with Medicare (CMS data updated 2026-10-02).
- 1856 E Florence BlvdCasa Grande, AZ 85122 (520) 836‑5036
- 580 N Camino Mercado, Suite 8Casa Grande, AZ 85122 (520) 381‑0381
- 655 S Dobson Rd, Suite 201Chandler, AZ 85224 (480) 307‑9471
- 865 N Arizola RdCasa Grande, AZ 85122 (520) 836‑3446
Group practices
Medicare enrollment lists Jonathan R. Willms as a member of this group (CMS data updated 2026-10-02).
- Sun Life Family Health Center Inc47 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Casa Grande
Clinicians with the same Medicare primary specialty in Casa Grande, AZ — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891010658 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians