Michael Allison, MD
NPI 1700011558 · Critical Care Medicine (Internal Medicine) Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Allison, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Baltimore, MD (NPI 1700011558).
Provider details
- NPI number
- 1700011558
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D79728 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
412 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 200 | $218 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 112 | $121 |
| Critical Care, Each Additional 30 Minutes99292 | 39 | $110 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 33 | $177 |
| Insertion of Non-Tunneled Central Venous Tube for Infusion (5 Years Or Older)36556 | 17 | $86 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 11 | $45 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$340 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-05-22
- Last updated
- 2021-10-23
- Certified
- 2021-10-23
Frequently asked questions
- What is Michael Allison's NPI number?
- Michael Allison's National Provider Identifier (NPI) is 1700011558, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Allison's specialty?
- Michael Allison is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Allison located?
- Michael Allison's practice location on file with NPPES is 900 S Caton Ave, Baltimore, MD 21229-5201.
- What is Michael Allison's phone number?
- The practice phone number listed in the NPPES registry for Michael Allison is (667) 234-3201.
- Does Michael Allison accept Medicare?
- Michael Allison is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Allison's NPI active?
- Yes — Michael Allison's NPI (1700011558) is active in the NPPES registry as of the last update on 2021-10-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.