Michael Armstrong, MD
NPI 1336191162 · Emergency Medicine Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Armstrong, MD is a Emergency Medicine Physician provider in Milwaukee, WI (NPI 1336191162).
Provider details
- NPI number
- 1336191162
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 36877-020 (WI)
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
20 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
655 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 | 204 | $169 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 196 | $115 |
| Critical Care, First 30-74 Minutes99291 | 128 | $206 |
| Electrocardiogram (ecg) 1 to 3 Leads With Review By Physician Only93042 | 74 | $7 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 17 | $69 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 13 | $169 |
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 |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 54 | 54 |
| Naproxen | 53 | 53 |
| Cephalexin | 48 | 48 |
| Ondansetron Hcl | 25 | 24 |
| Methylprednisolone | 23 | 22 |
| Azithromycin | 21 | 21 |
| Doxycycline Monohydrate | 18 | 18 |
| Albuterol Sulfate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-17
- Last updated
- 2008-05-16
Frequently asked questions
- What is Michael Armstrong's NPI number?
- Michael Armstrong's National Provider Identifier (NPI) is 1336191162, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Armstrong's specialty?
- Michael Armstrong is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Armstrong located?
- Michael Armstrong's practice location on file with NPPES is 3237 S 16th St, Milwaukee, WI 53215-4526.
- What is Michael Armstrong's phone number?
- The practice phone number listed in the NPPES registry for Michael Armstrong is (414) 527-8728.
- Does Michael Armstrong accept Medicare?
- Michael Armstrong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Armstrong's NPI active?
- Yes — Michael Armstrong's NPI (1336191162) is active in the NPPES registry as of the last update on 2008-05-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.