Thomas Horn, D.O.
NPI 1841516598 · Psychiatry Physician · Chesterfield, MO
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Horn, D.O. is a Psychiatry Physician provider in Chesterfield, MO (NPI 1841516598).
Provider details
- NPI number
- 1841516598
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 2014000221 (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
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
333 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 151 | $115 |
| 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 | 91 | $16 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 48 | $70 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 24 | $174 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 19 | $186 |
Typical Medicare-allowed amounts for these services range $16–$186 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 59 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 200 | 35 |
| Clonazepam | 176 | 31 |
| Sertraline Hcl | 145 | 28 |
| Quetiapine Fumarate | 143 | 24 |
| Diazepam | 126 | 21 |
| Lamotrigine | 121 | 27 |
| Fluoxetine Hcl | 118 | 15 |
Practice location
Mailing address
Additional practice locations (2)
- 1400 US Highway 61 Ste 150bFestus, MO 63028-4100Phone: (636) 543-2237
- 1400 US Highway 61 Ste 150aFestus, MO 63028-4100Phone: (636) 543-2230
Registry dates
- Enumerated
- 2010-04-19
- Last updated
- 2023-07-18
- Certified
- 2023-07-18
Frequently asked questions
- What is Thomas Horn's NPI number?
- Thomas Horn's National Provider Identifier (NPI) is 1841516598, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Horn's specialty?
- Thomas Horn is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Horn located?
- Thomas Horn's practice location on file with NPPES is 1176 Town and Country Commons Dr, Chesterfield, MO 63017-8200.
- What is Thomas Horn's phone number?
- The practice phone number listed in the NPPES registry for Thomas Horn is (314) 251-2870.
- Does Thomas Horn accept Medicare?
- Thomas Horn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Horn's NPI active?
- Yes — Thomas Horn's NPI (1841516598) is active in the NPPES registry as of the last update on 2023-07-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.