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MARY GREELEY MEDICAL CENTER
NPI 1477539492
General Acute Care Hospital in Ames, IA

Active since December 21, 2005
4/5
Hospital Overall Rating
1111 DUFF AVE, AMES, IA 50010(515) 239-2011(515) 239-2060 Get Directions Write a Review

NPPES record last updated: November 21, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mary Greeley Medical Center NPPES

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

MARY GREELEY MEDICAL CENTER (NPI 1477539492) is a healthcare organization registered as a general acute care hospital in Ames, Iowa and active in the NPI registry since December 2005. The organization lists Amber Deardorff, President/ceo, as its authorized official.

NPPES Registry Identity

NPI1477539492
Entity TypeOrganization
Primary Taxonomy282N00000X
Legal Business NameMARY GREELEY MEDICAL CENTER
Location Address1111 DUFF AVEAmes, IA 50010-5745
Mailing Address1111 Duff AveAmes, IA 50010-5745 · (515) 239-2011 · Fax (515) 239-2060
Phone(515) 239-2011
Fax(515) 239-2060
Organization SubpartNo
Authorized OfficialAmber DeardorffPresident/ceo · (515) 239-2105
Enumeration DateDecember 21, 2005
Last NPPES UpdateNovember 21, 2025
NPPES CertifiedNovember 21, 2025
✔ NPI 1477539492 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral Acute Care HospitalHospitals
Taxonomy Code282N00000X
Definition
An acute general hospital is an institution whose primary function is to provide inpatient diagnostic and therapeutic services for a variety of medical conditions, both surgical and non-surgical, to a wide population group. The hospital treats patients in an acute phase of illness or injury, characterized by a single episode or a fairly short duration, from which the patient returns to his or her normal or previous level of activity.
1111 DUFF AVE, Ames, IA 50010
Open in Google Maps ↗

Other Identifiers 2

Medicaid0159145IA
Medicaid0600304IA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company, Wellmark Health Plan of Iowa, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mary Greeley Medical Center is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

44

Medicare enrollment records show 44 clinicians reassign Medicare billing to Mary Greeley Medical Center, which bills Medicare for the services they deliver. Of these, 16 practice at this address and 19 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 11

Neurology13
Nurse Practitioner12
Psychiatry6
Cardiovascular Disease (Cardiology)3
Obstetrics/Gynecology3
Nephrology2
Clinical Social Worker1
Interventional Cardiology1
3 other specialties3

Nearest to this location (20)

See all 44
Kimberly Case, M.S. C.N.P.
Nurse Practitioner
NPI 1255317160
1111 DUFF AVE
Ames, IA 50010
(515) 956-2880
✔ PECOS✔ Accepts MedicareSame address
Jessica Ellensohn, ARNP
Nurse Practitioner
NPI 1437721446
1111 DUFF AVE
Ames, IA 50010
(515) 239-4401
✔ PECOS✔ Accepts MedicareSame address
Stuart Christenson, MD
Cardiovascular Disease (Cardiology)
NPI 1336112499
1111 DUFF AVE
Ames, IA 50010
(515) 239-4472
✔ PECOS✔ Accepts MedicareSame address
Ryan Ellis, TLMHC
Mental Health Counselor
NPI 1861104267
1111 DUFF AVE
Ames, IA 50010
(515) 233-7560
✔ PECOS✔ Accepts MedicareSame address
Shannon Lindley, PMHNP-BC
Nurse Practitioner
NPI 1720509342
1111 DUFF AVE
Ames, IA 50010
(515) 239-2011
✔ PECOS✔ Accepts MedicareSame address
Alicia Murphy, ARNP
Nurse Practitioner
NPI 1578321238
1111 DUFF AVE
Ames, IA 50010
(515) 239-2011
✔ PECOS✔ Accepts MedicareSame address
Jason Rasmussen, MD
Cardiovascular Disease (Cardiology)
NPI 1326279290
1111 DUFF AVENUE
Ames, IA 50010
(515) 239-4472
✔ PECOS✔ Accepts MedicareSame address
Anna Statz, D.O.
Osteopathic Manipulative Medicine
NPI 1235662982
1111 DUFF AVE.
Ames, IA 50010
(515) 239-2011
✔ PECOS✔ Accepts MedicareSame address
Kasey Strosahl, D.O.
Psychiatry
NPI 1568698769
1111 DUFF AVE BEHAVIORAL HEALTH
Ames, IA 50010
(515) 239-2682
✔ PECOS✔ Accepts MedicareSame address
Amanda Van Wyk, AGNP-C
Nurse Practitioner
NPI 1700423894
1111 DUFF AVE
Ames, IA 50010
(515) 239-4472
✔ PECOS✔ Accepts MedicareSame address
Snehitha Vijaykumar, M.D.
Interventional Cardiology
NPI 1376960526
1111 DUFF AVE
Ames, IA 50010
(515) 239-4472
✔ PECOS✔ Accepts MedicareSame address
Esteffania Villegas-Santamaria, MD
Cardiovascular Disease (Cardiology)
NPI 1457804395
1111 DUFF AVE
Ames, IA 50010
(515) 239-4472
✔ PECOS✔ Accepts MedicareSame address
Alexandria Carroll, MD
Obstetrics/Gynecology
NPI 1891351631
1015 DUFF AVE STE 100
Ames, IA 50010
(515) 239-6970
✔ PECOS✔ Accepts MedicareSame address
Ann Gessner, DO
Obstetrics/Gynecology
NPI 1598768269
1015 DUFF AVE STE 100
Ames, IA 50010
(515) 239-6970
✔ PECOS✔ Accepts MedicareSame address
Emily Jordison, ARNP
Nurse Practitioner
NPI 1780965400
1015 DUFF AVE
Ames, IA 50010
(515) 239-6970
✔ PECOS✔ Accepts MedicareSame address
Joyce Lines, MD
Obstetrics/Gynecology
NPI 1649270588
1015 DUFF AVE
Ames, IA 50010
(515) 239-6970
✔ PECOS✔ Accepts MedicareSame address
Courtney Martin, DNP
Nurse Practitioner
NPI 1285459115
133 E ONEIL DR
Ames, IA 50010
(515) 451-1905
✔ PECOS✔ Accepts Medicare0.6 mi
Courtney Makus, AG-ACNP
Nurse Practitioner
NPI 1720681554
1111 DUFF AVCENUE
Ames, IA 50010
(515) 239-4472
✔ PECOS✔ Accepts Medicare1.3 mi
David Cain, DPM
Podiatry
NPI 1790221174
2222 PHILADELPHIA ST
Ames, IA 50010
(515) 663-0900
✔ PECOS✔ Accepts Medicare1.5 mi
Sarah Clark, ARNP, PMHNP-BC
Nurse Practitioner
NPI 1598521098
800 E 1ST ST STE 1700
Ankeny, IA 50021
(515) 643-8350
✔ PECOS✔ Accepts Medicare21 mi
See all 44 clinicians

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

Hospital Quality Ratings CMS Care Compare

Quality and patient-experience ratings for Mary Greeley Medical Center (CMS certification number 160030), from CMS Care Compare.

Mary Greeley Medical Center

Acute Care Hospitals · Ames, IA
4/5 CMS Overall Rating
OwnershipGovernment - Local
CMS Certification Number160030
Location1111 Duff AvenueAmes, IA 50010 · Story County · (515) 239-2011
Emergency services Birthing friendly Meaningful use of EHRs

Patient Experience

HCAHPS patient survey · Jan 2023 – Dec 2023
4/5 summary rating
Nurse communication
4/5
Doctor communication
4/5
Staff responsiveness
3/5
Communication about medicines
4/5
Discharge information
4/5
Care transition
4/5
Cleanliness
3/5
Quietness
4/5
Overall hospital rating
4/5
Recommend hospital
5/5
Star ratings summarize responses from patients surveyed after discharge, collected through the CMS HCAHPS program.

Complications & Deaths 18

Rate of complications for hip/knee replacement patients
4.3 No different than national
Death rate for heart attack patients
10.7% No different than national
Death rate for COPD patients
8.9% No different than national
Death rate for heart failure patients
14.4% No different than national
Death rate for pneumonia patients
18.6% No different than national
Death rate for stroke patients
13.2% No different than national

Infections 5

Central Line Associated Bloodstream Infection (ICU + select Wards)
0 observed cases · 1.692 predicted · 2,535 patient days
0.000 No different than national
Catheter Associated Urinary Tract Infections (ICU + select Wards)
6 observed cases · 3.216 predicted · 4,616 patient days
1.866 No different than national
SSI - Colon Surgery
2 observed cases · 3.584 predicted · 146 patient days
0.558 No different than national
MRSA Bacteremia
1 observed case · 1.428 predicted · 40,464 patient days
0.700 No different than national
Clostridium Difficile (C.Diff)
14 observed cases · 20.241 predicted · 37,498 patient days
0.692 No different than national

Unplanned Hospital Visits 13

Hospital return days for heart attack patients
187 days per 100 discharges
Hospital return days for heart failure patients
506 days per 100 discharges
Hospital return days for pneumonia patients
344 days per 100 discharges
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)
2638 No different than national
Rate of inpatient admissions for patients receiving outpatient chemotherapy
26 No different than national
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapy
26 No different than national

Timely & Effective Care 16

Intensive Care Unit Venous Thromboembolism Prophylaxis
78%
Venous Thromboembolism Prophylaxis
73%
Antithrombotic Therapy by End of Hospital Day 2
97%
Severe Sepsis 6-Hour Bundle
97%
Severe Sepsis 3-Hour Bundle
77%
Septic Shock 6-Hour Bundle
53%

Maternal Health 2

Elective Delivery
23%
Maternal Morbidity Structural Measure
Yes

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 Mary Greeley Medical Center's NPI number?

The NPI number for Mary Greeley Medical Center is 1477539492. It was assigned to this organization in the NPPES registry on December 21, 2005.

Where is Mary Greeley Medical Center located?

Mary Greeley Medical Center is located at 1111 Duff Ave, Ames, IA 50010. The listed phone number is (515) 239-2011.

What is Mary Greeley Medical Center's specialty?

The primary specialty registered for this NPI is General Acute Care Hospital with taxonomy code 282N00000X.

Is Mary Greeley Medical Center enrolled in Medicare?

Yes. Mary Greeley Medical Center is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Mary Greeley Medical Center?

According to the CMS Revalidation Reassignment List (October 2026 release), 44 clinicians in 11 Medicare specialties reassign their Medicare billing to Mary Greeley Medical Center. A 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 the clinician's services. The largest specialties are Neurology (13), Nurse Practitioner (12) and Psychiatry (6). Of these, 16 practice at this address and 19 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Is Mary Greeley Medical Center a Medicare-certified hospital?

Yes. Mary Greeley Medical Center is a Medicare-certified hospital (Acute Care Hospitals). The hospital provides emergency services.

What quality rating does Mary Greeley Medical Center have?

CMS rates Mary Greeley Medical Center 4 out of 5 stars overall on Care Compare, based on measures of safety, patient experience and outcomes. The full measure detail is in the Hospital Quality Ratings section above.

What insurance does Mary Greeley Medical Center accept?

Health plans from Oscar Insurance Company and Wellmark Health Plan of Iowa, Inc. list Mary Greeley Medical Center 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 Mary Greeley Medical Center was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.