Stewart Greathouse, M.D.
NPI 1740589621 · Family Medicine Physician · Lake Charles, LA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stewart Greathouse, M.D. is a Family Medicine Physician provider in Lake Charles, LA (NPI 1740589621).
Provider details
- NPI number
- 1740589621
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD.205459 (LA)
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
15 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
1,137 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 380 | $83 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 375 | $119 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 272 | $9 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 34 | $13 |
| Physician Or Allowed Practitioner Re-Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians aG0179 | 18 | $38 |
| Urinalysis, Manual Test |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 146 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 530 | 153 |
| Pantoprazole Sodium | 297 | 88 |
| Levothyroxine Sodium | 249 | 62 |
| Amlodipine Besylate | 246 | 72 |
| Furosemide | 204 | 55 |
| Gabapentin | 203 | 59 |
| Losartan Potassium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,314 across 83 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
- 2011-03-18
- Last updated
- 2022-04-27
- Certified
- 2022-04-27
Frequently asked questions
- What is Stewart Greathouse's NPI number?
- Stewart Greathouse's National Provider Identifier (NPI) is 1740589621, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stewart Greathouse's specialty?
- Stewart Greathouse is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stewart Greathouse located?
- Stewart Greathouse's practice location on file with NPPES is 217 Sam Houston Jones Pkwy, Lake Charles, LA 70611-5644.
- What is Stewart Greathouse's phone number?
- The practice phone number listed in the NPPES registry for Stewart Greathouse is (337) 480-8989.
- Does Stewart Greathouse accept Medicare?
- Stewart Greathouse is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stewart Greathouse's NPI active?
- Yes — Stewart Greathouse's NPI (1740589621) is active in the NPPES registry as of the last update on 2022-04-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.