1. Home
  2. Directory
  3. Iowa
  4. West Des Moines
  5. Anesthesiology
  6. NPI Profile

WILLIAM JOSEPH BROSNAHAN M.D.
NPI 1104803873
Anesthesiology in West Des Moines, IA

Active since December 23, 2005PECOS EnrolledAccepts Medicare Assignment
4200 UNIVERSITY AVE, SUITE 300, WEST DES MOINES, IA 50266(515) 401-1950(515) 401-1955 Get Directions Write a Review

NPPES record last updated: May 19, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 19, 2020, Mar 3, 2020 (2 updates tracked since 2020).

About William Joseph Brosnahan M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM JOSEPH BROSNAHAN M.D. (NPI 1104803873) is an individual anesthesiology provider in West Des Moines, Iowa, licensed in Iowa (28850) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with Unitypoint Health - Des Moines Iowa Methodist Medi, and is a graduate of University Of Iowa, Rj & L Carver College Of Medicine (1991).

NPPES Registry Identity

NPI1104803873
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameWILLIAM JOSEPH BROSNAHANCredential: M.D.
Location Address4200 UNIVERSITY AVE, SUITE 300West Des Moines, IA 50266-5945
Mailing Address4200 University Ave, Suite 300West Des Moines, IA 50266-5945 · (515) 401-1950 · Fax (515) 401-1955
Phone(515) 401-1950
Fax(515) 401-1955
Sole ProprietorNo
Medical School CMSUniversity Of Iowa, Rj & L Carver College Of MedicineGraduated 1991
Enumeration DateDecember 23, 2005
Last NPPES UpdateMay 19, 20202 updates tracked since enumeration
NPPES CertifiedMay 19, 2020
✔ NPI 1104803873 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in IA · 28850
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
4200 UNIVERSITY AVE, West Des Moines, IA 50266
Open in Google Maps ↗

Other Identifiers 6

Other050040899IA · Railroad Medicare #
Medicaid0122655IA
Other51342IA · Blue Shield Provider #
OtherIA0165IA · John Deere Provider #
Other4262IA · Midlands Provider #
Other28850IA · Tricare Provider #

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Joseph Brosnahan M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9436281573
PECOS Enrollment IDI20100724000312
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Brosnahan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Waukee Surgery Center LLC
5.8 mi
Ambulatory Surgical
1025 SE TALLGRASS LANE
Waukee, IA 50263
  • Reassigned Medicare billing, Iowa enrollment
  • Medicare enrollment name: Associated Anesthesiologists PC
  • 66 clinicians in this Medicare group
NPI 1043094527 (515) 875-8000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Anesthesia for procedure for total knee joint replacement 01402
Anesthesia for a total knee joint replacement numbs your body to eliminate pain during surgery. This could be general anesthesia where you're unconscious, or regional anesthesia where only the leg is numb. It's administered by a specialist, ensuring safety and comfort.
16 services16 patients
Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) 64447
This procedure involves injecting a numbing agent and/or steroid into a nerve in your thigh. It's done to alleviate pain or inflammation. A needle will be carefully positioned near the nerve, and the medicine will be administered.
15 services15 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Unitypoint Health - Des Moines Iowa Methodist Medi

Acute Care Hospitals · Des Moines, IA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number160082
Location1200 Pleasant StreetDes Moines, IA 50309 · Polk County
Emergency services Birthing friendly

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

WILLIAM EUGENE DAVIS JR. M.D.
Anesthesiology
4200 UNIVERSITY AVE, SUITE 300
WEST DES MOINES, IA 50266
Dallas County (515) 401-1950
MR. JAMIE H JOHNSON M.D.
Anesthesiology
4200 UNIVERSITY AVE, SUITE 300
WEST DES MOINES, IA 50266
Dallas County (515) 401-1950
ZACHARIAH STANLEY PEDERSON D.O.
Anesthesiology
4200 UNIVERSITY AVE, SUITE 300
WEST DES MOINES, IA 50266
Dallas County (515) 401-1950
IOWA DIAGNOSTIC IMAGING & PROCEDURE L C
Radiology (Diagnostic Radiology)
4200 UNIVERSITY AVE, SUITE 104
WEST DES MOINES, IA 50266
Dallas County (515) 961-0453
JOHN CHARLES JABOUR M.D.
Anesthesiology
4200 UNIVERSITY AVE, SUITE 300
WEST DES MOINES, IA 50266
Dallas County (515) 401-1950

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Brosnahan's NPI number?

The NPI number for William Brosnahan is 1104803873. It was assigned to this individual provider in the NPPES registry on December 23, 2005.

Where is William Brosnahan located?

William Brosnahan practices at 4200 University Ave Suite 300, West Des Moines, IA 50266. The listed phone number is (515) 401-1950.

What is William Brosnahan's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is William Brosnahan enrolled in Medicare?

Yes. William Brosnahan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for William Brosnahan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Brosnahan reassigns Medicare benefits to Waukee Surgery Center LLC (Waukee, IA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Brosnahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is William Brosnahan affiliated with any hospitals?

According to CMS data, William Brosnahan is affiliated with Unitypoint Health - Des Moines Iowa Methodist Medi.

When was this NPI record last updated?

The NPPES record for William Brosnahan was last updated on May 19, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.