Mark Stewart, DO
NPI 1164634390 · Psychiatry Physician · Springfield, MO
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Stewart, DO is a Psychiatry Physician provider in Springfield, MO (NPI 1164634390).
Provider details
- NPI number
- 1164634390
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 0531752 (KS)
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
19 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
327 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 204 | $73 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 29 | $74 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 25 | $120 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 24 | $161 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 24 | $105 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 21 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 67 | 19 |
| Lamotrigine | 31 | — |
| Clonazepam | 30 | — |
| Levothyroxine Sodium | 27 | — |
| Paliperidonebrand: Paliperidone Er | 26 | — |
| Gabapentin | 26 | 14 |
| Mirtazapine | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$179 across 3 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
- 2007-05-03
- Last updated
- 2019-07-15
Frequently asked questions
- What is Mark Stewart's NPI number?
- Mark Stewart's National Provider Identifier (NPI) is 1164634390, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Stewart's specialty?
- Mark Stewart is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Stewart located?
- Mark Stewart's practice location on file with NPPES is 1423 N Jefferson Ave, Springfield, MO 65802-1917.
- What is Mark Stewart's phone number?
- The practice phone number listed in the NPPES registry for Mark Stewart is (417) 269-6891.
- Does Mark Stewart accept Medicare?
- Mark Stewart is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Stewart's NPI active?
- Yes — Mark Stewart's NPI (1164634390) is active in the NPPES registry as of the last update on 2019-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.