Michael Gerardo, D.O.
NPI 1851588800 · Internal Medicine Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Gerardo, D.O. is a Internal Medicine Physician provider in Saint Louis, MO (NPI 1851588800).
Provider details
- NPI number
- 1851588800
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 34.009146 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
1,810 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 643 | $123 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 231 | $124 |
| 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'SG2211 | 183 | $16 |
| Hemoglobin A1c Level83036 | 153 | $10 |
| Administration of Influenza Virus VaccineG0008 | 99 | $31 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 217 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,156 | 319 |
| Levothyroxine Sodium | 717 | 163 |
| Losartan Potassium | 562 | 133 |
| Lisinopril | 559 | 157 |
| Sertraline Hcl | 494 | 123 |
| Amlodipine Besylate | 456 | 136 |
| Pantoprazole Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,143 across 157 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
- 2007-10-03
- Last updated
- 2016-01-26
Frequently asked questions
- What is Michael Gerardo's NPI number?
- Michael Gerardo's National Provider Identifier (NPI) is 1851588800, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Gerardo's specialty?
- Michael Gerardo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Gerardo located?
- Michael Gerardo's practice location on file with NPPES is 12348 Old Tesson Rd, Saint Louis, MO 63128-2251.
- What is Michael Gerardo's phone number?
- The practice phone number listed in the NPPES registry for Michael Gerardo is (314) 272-2727.
- Does Michael Gerardo accept Medicare?
- Michael Gerardo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Gerardo's NPI active?
- Yes — Michael Gerardo's NPI (1851588800) is active in the NPPES registry as of the last update on 2016-01-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.