Gregory Vanstavern, MD
NPI 1134166051 · Neuro-ophthalmology Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Vanstavern, MD is a Neuro-ophthalmology Physician provider in Saint Louis, MO (NPI 1134166051).
Provider details
- NPI number
- 1134166051
- Entity type
- Individual
- Primary specialty
- Neuro-ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2009005330 (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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
752 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) |
|---|---|---|
| Imaging of Retina92134 | 175 | $36 |
| Exam of Visual Field With Extended Testing92083 | 161 | $60 |
| Established Patient Complete Exam of Visual System92014 | 115 | $120 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 112 | $159 |
| Exam to Measure Eye Deviation and Range of Motion92060 | 55 | $60 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 28 | $123 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pyridostigmine Bromide | 80 | 20 |
| Prednisone | 52 | 12 |
| Gabapentin | 39 | — |
| Topiramate | 21 | — |
| Mycophenolate Mofetil | 16 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-31
- Last updated
- 2025-04-21
- Certified
- 2022-06-07
Frequently asked questions
- What is Gregory Vanstavern's NPI number?
- Gregory Vanstavern's National Provider Identifier (NPI) is 1134166051, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Vanstavern's specialty?
- Gregory Vanstavern is listed in the NPPES registry with a primary specialty of Neuro-ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Vanstavern located?
- Gregory Vanstavern's practice location on file with NPPES is 4901 Forest Park Ave, Saint Louis, MO 63108-1495.
- What is Gregory Vanstavern's phone number?
- The practice phone number listed in the NPPES registry for Gregory Vanstavern is (314) 362-3937.
- Does Gregory Vanstavern accept Medicare?
- Gregory Vanstavern is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Vanstavern's NPI active?
- Yes — Gregory Vanstavern's NPI (1134166051) is active in the NPPES registry as of the last update on 2025-04-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.