Joseph Michalsen, DO
NPI 1841586989 · Emergency Medicine Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Michalsen, DO is a Emergency Medicine Physician provider in Ann Arbor, MI (NPI 1841586989).
Provider details
- NPI number
- 1841586989
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 5101019468 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
686 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 283 | $179 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 164 | $8 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 156 | $124 |
| Critical Care, First 30-74 Minutes99291 | 43 | $213 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 40 | $73 |
Typical Medicare-allowed amounts for these services range $8–$213 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 40 | 40 |
| Prednisone | 34 | 33 |
| Ondansetronbrand: Ondansetron Odt | 27 | 27 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 25 | 21 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 24 | 23 |
| Ibuprofen | 18 | 18 |
| Tramadol Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-28
- Last updated
- 2015-10-05
Frequently asked questions
- What is Joseph Michalsen's NPI number?
- Joseph Michalsen's National Provider Identifier (NPI) is 1841586989, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Michalsen's specialty?
- Joseph Michalsen is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Michalsen located?
- Joseph Michalsen's practice location on file with NPPES is 2000 Green Rd, Ann Arbor, MI 48105-1598.
- What is Joseph Michalsen's phone number?
- The practice phone number listed in the NPPES registry for Joseph Michalsen is (734) 995-3764.
- Does Joseph Michalsen accept Medicare?
- Joseph Michalsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Michalsen's NPI active?
- Yes — Joseph Michalsen's NPI (1841586989) is active in the NPPES registry as of the last update on 2015-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.