Medical groups in Waterloo, IA
- Medical groups
- 29
- Multi-specialty
- 8
- Single-specialty
- 21
- More than one site
- 11
- 100+ physicians
- 2
There are 29 medical groups in Waterloo with a Medicare PAC ID. MercyOne Waterloo OB/GYN is the largest, with 156 Iowa physicians, followed by UnityPoint Health - Allen Hospital with 126. 72% of Waterloo groups are independent.
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MercyOne Waterloo OB/GYN is the largest medical group in Waterloo, with 156 physicians
Ranked by physicians with an Iowa address linked to each group based in Waterloo. UnityPoint Health - Allen Hospital is second with 126, and Cedar Valley Medical Specialists third with 35. 2 Waterloo groups have 100 or more physicians.
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Showing 1 to 10 of 29 medical groups in Waterloo
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
Trinity Health has the most physicians in Waterloo medical groups, with 163 across 2 groups
Dmand AI maps every Waterloo medical group to its parent organization, up to the health system or platform at the top. 2 parent organizations have two or more Waterloo medical groups. Among health systems, UnityPoint Health has the most groups, 3. Each clinician counts once per parent organization.
- Trinity Health
- MercyOne Waterloo OB/GYN
- MercyOne Oelwein Medical Center
See every medical group, site and clinician under Trinity Health
Org Hierarchy Explorer maps every group, site of care and clinician under the parent, with the leaders at each group.
Source: Dmand AI Org Hierarchy Data
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Dmand AI maps the owners, administrators and physician leaders at each of the 29 Waterloo medical groups, with the parent organization above each one, and finds validated work emails and mobile numbers.
72% of Waterloo medical groups are independent, with no larger parent organization
A group counts as independent when no health system, platform or other organization sits above it in the org hierarchy. Every other group belongs to a larger organization.
Waterloo medical groups by ownership
- Independent21
- Health system or hospital5
- Platform or corporate owner1
- Community or government1
- Other organization1
Source: Dmand AI Org Hierarchy Data
8 Waterloo medical groups practice at a hospital site
Beyond their own offices, groups practice at the sites of care linked to them in the org hierarchy. A group can practice at several kinds of site, so the shares overlap.
Waterloo medical groups by site of care
- Hospitals8
- Behavioral health facilities4
- Ambulatory surgery centers1
- FQHCs1
- Therapy and rehab centers1
- Hospices1
- Dialysis centers1
Sources: Dmand AI Practice Data and Dmand AI Org Hierarchy Data
Primary care groups are the most common medical groups in Waterloo, with 10
Each group is counted once, under its main specialty. Behavioral and mental health groups are second, with 7, and 8 Waterloo groups are multi-specialty.
- Primary care10
- Behavioral and mental health7
- Chiropractic6
- Podiatry2
- Anesthesia and pain1
- Eye care1
- Pathology and laboratory1
- Rehabilitation and therapy1
Source: Dmand AI Professional Profile Data
745 Iowa HCPs work in Waterloo medical groups, 332 of them physicians
Each clinician is counted once, across every Waterloo group they are linked to. Only clinicians with an Iowa address are counted.
HCPs in Waterloo medical groups by type
- Physicians (MD, DO)332
- Nurses and nurse practitioners224
- Behavioral health clinicians78
- Physician assistants55
- Chiropractors16
- Other HCPs40
Source: Dmand AI Affiliation Data
Each Waterloo medical group profile shows the parent, sites, clinicians and identifiers
- Clinicians and specialtiesA count by specialty and a sample of the group's cliniciansOn every profile
- Practice locationsMain site and a sample of practice locations, with a count of the restOn every profile
- Medicare Part B paymentsMedicare payments to the group, from CMSOn every profile
- Group NPI and Medicare PAC IDIdentifiers for matching records across sourcesOn every profile
- Parent organizationThe health system, platform or owner above the groupOn every profile
- Every clinician and siteThe full roster and every practice locationWith a free account
- Leader and clinician contactsWork emails and mobile numbers, found on request and then validatedWith a free account
- EHR used by the group's cliniciansThe EHR in use at the group's sitesWith a free account
Free account: 30 days free, self-serve, no credit card.
Sources: Doctors and Clinicians National Downloadable File (CMS), Medicare Physician & Other Practitioners (CMS) and Dmand AI Org Hierarchy Data
Sources for the Waterloo medical group directory
| Data on this page | Source |
|---|---|
| Medical groups, specialties and sites | Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Professional Profile Data |
| Parent organizations and independence | Dmand AI Org Hierarchy Data |
| Physicians and HCPs | Dmand AI Affiliation Data |
| Group NPI and PAC ID | NPPES NPI Registry (CMS) and Doctors and Clinicians National Downloadable File (CMS) |
Data last refreshed October 2026Report an inaccuracyRemove my information
The directory lists groups based in Waterloo with a Medicare PAC ID.
FAQ
Frequently asked questions about medical groups in Waterloo
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
How many medical groups are in Waterloo?
There are 29 medical groups based in Waterloo with a Medicare PAC ID: 8 multi-specialty and 21 single-specialty. 11 of them have more than one site.
What is the largest medical group in Waterloo?
MercyOne Waterloo OB/GYN, with 156 physicians and 271 HCPs with an Iowa address. UnityPoint Health - Allen Hospital is second with 126, and Cedar Valley Medical Specialists is third with 35.
Which health system has the most medical groups in Waterloo?
By physicians, Trinity Health, with 163 across 2 groups, followed by UnityPoint Health with 127.
How many Waterloo medical groups are independent?
21, or 72%, have no larger parent organization in the Dmand AI org hierarchy. 5 belong to a health system or hospital and 1 to a physician platform or corporate owner.
How many Waterloo medical groups practice at a hospital?
8 Waterloo groups practice at a hospital site linked to them in the Dmand AI org hierarchy.
How do I find a medical group's NPI or PAC ID?
Each medical group profile lists the group NPI and Medicare PAC ID at the top, with the main address and phone number. The NPI comes from the NPPES NPI Registry and the PAC ID from CMS Medicare enrollment.
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