Peter Gardiner, MD
NPI 1225055783 · Emergency Medicine Physician · Saint Peters, MO
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Gardiner, MD is a Emergency Medicine Physician provider in Saint Peters, MO (NPI 1225055783).
Provider details
- NPI number
- 1225055783
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- R6D18 (MO)
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
19 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
463 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 | 269 | $169 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 163 | $116 |
| Critical Care, First 30-74 Minutes99291 | 31 | $204 |
Typical Medicare-allowed amounts for these services range $116–$204 (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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 48 | 48 |
| Prednisone | 41 | 40 |
| Cefdinir | 29 | 29 |
| Ondansetronbrand: Ondansetron Odt | 17 | 16 |
| Clonidine Hcl | 14 | 13 |
| Atenolol | 13 | — |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-17
- Last updated
- 2025-07-14
Frequently asked questions
- What is Peter Gardiner's NPI number?
- Peter Gardiner's National Provider Identifier (NPI) is 1225055783, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Gardiner's specialty?
- Peter Gardiner is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Gardiner located?
- Peter Gardiner's practice location on file with NPPES is 10 Hospital Dr, Saint Peters, MO 63376-1659.
- What is Peter Gardiner's phone number?
- The practice phone number listed in the NPPES registry for Peter Gardiner is (314) 362-9123.
- Does Peter Gardiner accept Medicare?
- Peter Gardiner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Gardiner's NPI active?
- Yes — Peter Gardiner's NPI (1225055783) is active in the NPPES registry as of the last update on 2025-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.