Quick answers
- Does Diana R. Poortenga accept Medicare assignment?
- Yes. Medicare's clinician data says Diana R. Poortenga accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Diana R. Poortenga see?
- In 2024, CMS data shows 137 Original Medicare patients and 392 services for Diana R. Poortenga. This counts Original Medicare only and measures volume, not quality.
- What is Diana R. Poortenga's NPI number?
- 1780207332. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Diana R. Poortenga, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 137 |
|---|---|
| Services billed to Medicare | 392 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Detection test by immunoassay with direct visual observation for influenza virus (87804)88 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)82 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)50 services
- Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) (87811)48 services
- Urinalysis, manual test (81002)32 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure69%
- High cholesterol69%
- Arthritis36%
- Anxiety28%
- Diabetes26%
- Ischemic heart disease23%
Practice locations
Addresses where Diana R. Poortenga is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 11; the Medicare profile lists all.
- 1009 5th AveHammond, IN 46320 (219) 473‑0722
- 129 E 107th AveCrown Point, IN 46307 (219) 662‑4134
- 1500 Indianapolis BlvdSchererville, IN 46375 (219) 440‑7373
- 1923 W Glen Park AveGriffith, IN 46319 (219) 922‑2535
- 31 E Sibley St, Suite AHammond, IN 46320 (219) 802‑8800
Group practices
Medicare enrollment lists Diana R. Poortenga as a member of these groups (CMS data updated October 2, 2026).
- Midwest Express Care 4 LLC63 clinicians in the group
- Nwi Urgent Care, LLC44 clinicians in the group
- Midwest Express Care, Inc33 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Hammond
Clinicians with the same Medicare primary specialty in Hammond, IN — not a recommendation.
Other clinicians in Midwest Express Care 4 LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2019 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1780207332 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians