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ALEX RIER MD
NPI 1548907728
Anesthesiology in Des Moines, IA

Active since May 18, 2022PECOS Enrolled
1200 PLEASANT ST, DES MOINES, IA 50309(515) 241-6372(515) 241-5375 Get Directions Write a Review

NPPES record last updated: June 25, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Alex Rier Md NPPES

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

ALEX RIER MD (NPI 1548907728) is an individual anesthesiology provider in Des Moines, Iowa, licensed in Iowa (R-12459) and active in the NPI registry since May 2022. He is enrolled in Medicare PECOS and is a graduate of University Of Iowa, Rj & L Carver College Of Medicine (2022).

NPPES Registry Identity

NPI1548907728
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameALEX RIERCredential: MD
Location Address1200 PLEASANT STDes Moines, IA 50309-1406
Mailing AddressPo Box 180Des Moines, IA 50301-0180 · (515) 401-1950 · Fax (515) 401-1955
Phone(515) 241-6372
Fax(515) 241-5375
Sole ProprietorNo
Medical School CMSUniversity Of Iowa, Rj & L Carver College Of MedicineGraduated 2022
Enumeration DateMay 18, 2022
Last NPPES UpdateJune 25, 2026
NPPES CertifiedJune 25, 2026
✔ NPI 1548907728 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in IA · R-12459
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.
1200 PLEASANT ST, Des Moines, IA 50309
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Sunflower Health Plan, Ambetter Health, Medica.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alex Rier Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5395126999
PECOS Enrollment IDI20260730003067
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 Alex Rier reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Associated Anesthesiologists, P.C.
Same address
Anesthesiology
1200 PLEASANT ST
Des Moines, IA 50309
  • Reassigned Medicare billing, Iowa enrollment
  • Medicare enrollment name: Associated Anesthesiologists PC
  • 66 clinicians in this Medicare group
NPI 1215904750 (515) 401-1950

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

Other Providers at the Same Location NPPES 20

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

CENTRAL IOWA HOSPITAL CORPORATION
Pharmacy
1200 PLEASANT ST
DES MOINES, IA 50309
Polk County (515) 241-5936
CATHERINE P MCNEILL M.D.
Pediatrics
1200 PLEASANT ST
DES MOINES, IA 50309
Polk County (515) 241-6611
CENTRAL IOWA HOSPITAL CORPORATION
Rehabilitation Unit
1200 PLEASANT ST
DES MOINES, IA 50309
Polk County (515) 241-6212
DR. LISA I HARDISTY M.D.
Pediatrics
1200 PLEASANT ST
DES MOINES, IA 50309
Polk County (515) 241-5926
BROOKE JOHNSON D.O.
Emergency Medicine
1200 PLEASANT ST
DES MOINES, IA 50309
Polk County (515) 241-6262
JAMIE LYNN PIOTROWSKI NP-C
Nurse Practitioner
1200 PLEASANT ST
DES MOINES, IA 50309
Polk County (515) 524-1621
BILAL HASAN BAIG DO
Internal Medicine
1200 PLEASANT ST
DES MOINES, IA 50309
Polk County (515) 241-6636
HOLLEY A BZDEGA MD
Pediatrics (Neonatal-Perinatal Medicine)
1200 PLEASANT ST, NEONATOLOGY
DES MOINES, IA 50309
Polk County (515) 241-4444

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 Alex Rier's NPI number?

The NPI number for Alex Rier is 1548907728. It was assigned to this individual provider in the NPPES registry on May 18, 2022.

Where is Alex Rier located?

Alex Rier practices at 1200 Pleasant St, Des Moines, IA 50309. The listed phone number is (515) 241-6372.

What is Alex Rier's specialty?

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

Is Alex Rier enrolled in Medicare?

Yes. Alex Rier is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alex Rier's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alex Rier reassigns Medicare benefits to Associated Anesthesiologists, P.C. (Des Moines, 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 Alex Rier's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Alex Rier accept?

Health plans from Ambetter Health, Ambetter from Sunflower Health Plan and Medica list Alex Rier as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Alex Rier was last updated on June 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.