Quick answers
- Does Hans S. Grinager accept Medicare assignment?
- Yes. Medicare's clinician data says Hans S. Grinager 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 Hans S. Grinager see?
- In 2024, CMS data shows 307 Original Medicare patients and 1,102 services for Hans S. Grinager. This counts Original Medicare only and measures volume, not quality.
- What is Hans S. Grinager's NPI number?
- 1134389463. 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 Hans S. Grinager, 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 | 307 |
|---|---|
| Services billed to Medicare | 1,102 |
| Different services or procedures | 31 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Removal of cataract with insertion of prosthetic lens (66984)166 services
- Measurement of corneal curvature and depth of eye (92136)116 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)113 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)111 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)105 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 cholesterol66%
- High blood pressure59%
- Arthritis41%
- Diabetes21%
- Anxiety19%
- Osteoporosis19%
Hospitals where Hans S. Grinager works
Medicare's Facility Affiliation Data lists Hans S. Grinager at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Park Nicollet Methodist HospitalSaint Louis Park, MN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 240053
Practice locations
Addresses where Hans S. Grinager is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 15800 95th Ave NMaple Grove, MN 55369 (952) 993‑1440
- 3800 Park Nicollet BlvdSt Louis Park, MN 55416 (952) 993‑3123
- 3850 Park Nicollet BlvdSt Louis Park, MN 55416 (952) 993‑3123
- 3900 Park Nicollet BlvdSt Louis Park, MN 55416 (952) 993‑3123
- 5320 Hyland Greens DrBloomington, MN 55437 (952) 993‑2400
Group practices
Medicare enrollment lists Hans S. Grinager as a member of this group (CMS data updated October 2, 2026).
- Park Nicollet Clinic1,787 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Maple Grove
Clinicians with the same Medicare primary specialty in Maple Grove, MN — not a recommendation.
Other clinicians in Park Nicollet Clinic
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Minnesota Medical School |
| Graduation year | 2008 (18 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134389463 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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