Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

John Williams, DO

Individual provider Anesthesiology Physician · NPI 1417334962

John Williams, DO practises Anesthesiology in Des Moines, Iowa. Graduated from Kansas City University of Physicians and Surgeons in 2015, 11 years ago. Practices with Associated Anesthesiologists PC, a 65-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Iowa and Kansas.

Years since qualifying
11
Trained at
Kansas City University of Physicians and Surgeons
Licensed in
IA, KS
In the registry since
2015
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1200 Pleasant St
Des Moines, IA 50309-1406
Phone: (515) 241-6212
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4201 Westown Pkwy Ste 236, West Des Moines, IA 50266-6720 — (515) 401-1950

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence DO-05325 (IA)
Anesthesiology Physician Taxonomy 207L00000X · Licence 9408565 (KS)

Record details

NPI number1417334962
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 5, 2015
Last updated in NPPESJune 26, 2024
Certification dateJune 26, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolKANSAS CITY UNIVERSITY OF PHYSICIANS AND SURGEONS
Graduated 2015 (11 years in practice)
Group practice Associated Anesthesiologists Pc — 65 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients155
Services billed 234 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $117 5 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Unitypoint Health - Des Moines Iowa Methodist Medi Hospital · Des Moines, IA

Colleagues at Associated Anesthesiologists PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 65 clinicians in the practice; 12 are shown here.

Other providers in Des Moines