Larry Buck, DO
NPI 1851749139 · Internal Medicine Physician · Ferguson, MO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Larry Buck, DO is a Internal Medicine Physician provider in Ferguson, MO (NPI 1851749139).
Provider details
- NPI number
- 1851749139
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 2019024147 (MO)
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
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
532 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 | 97 | $123 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 87 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 58 | $88 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 45 | $16 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 43 | $8 |
| Hemoglobin A1c Level83036 | 40 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 113 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 453 | 143 |
| Atorvastatin Calcium | 417 | 127 |
| Losartan Potassium | 386 | 109 |
| Rosuvastatin Calcium | 304 | 100 |
| Metformin Hcl | 238 | 72 |
| Gabapentin | 211 | 64 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$327 across 15 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
Additional practice locations (1)
- 3409 Union BlvdSaint Louis, MO 63115-1127Phone: (314) 261-4834Fax: (314) 383-3970
Registry dates
- Enumerated
- 2016-05-27
- Last updated
- 2025-09-24
- Certified
- 2025-09-24
Frequently asked questions
- What is Larry Buck's NPI number?
- Larry Buck's National Provider Identifier (NPI) is 1851749139, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Larry Buck's specialty?
- Larry Buck is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Larry Buck located?
- Larry Buck's practice location on file with NPPES is 199 N Florissant Rd, Ferguson, MO 63135-1976.
- What is Larry Buck's phone number?
- The practice phone number listed in the NPPES registry for Larry Buck is (314) 449-9640.
- Does Larry Buck accept Medicare?
- Larry Buck is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Larry Buck's NPI active?
- Yes — Larry Buck's NPI (1851749139) is active in the NPPES registry as of the last update on 2025-09-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.