Mason Bias, M.D.
NPI 1912982794 · Ophthalmology Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mason Bias, M.D. is a Ophthalmology Physician provider in Saint Louis, MO (NPI 1912982794).
Provider details
- NPI number
- 1912982794
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2001001461 (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
20 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
477 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) |
|---|---|---|
| Measurement of Corneal Curvature and Depth of Eye92136 | 127 | $37 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 126 | $437 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 90 | $123 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 73 | $161 |
| Removal of Recurring Cataract in Lens Capsule Using a Laser66821 | 44 | $262 |
| Ct Scan of Cornea92025 | 17 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 280 | 156 |
| Moxifloxacin Hclbrand: Moxifloxacin | 277 | 152 |
| Bromfenac Sodiumbrand: Prolensa | 85 | 63 |
| Latanoprost | 32 | — |
| Timolol Maleate | 14 | — |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 11 | — |
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 , 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$135 across 2 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
- 2005-12-14
- Last updated
- 2013-04-08
Frequently asked questions
- What is Mason Bias's NPI number?
- Mason Bias's National Provider Identifier (NPI) is 1912982794, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mason Bias's specialty?
- Mason Bias is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Mason Bias located?
- Mason Bias's practice location on file with NPPES is 12855 N 40 Dr, Saint Louis, MO 63141-8657.
- What is Mason Bias's phone number?
- The practice phone number listed in the NPPES registry for Mason Bias is (314) 983-9800.
- Does Mason Bias accept Medicare?
- Mason Bias is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mason Bias's NPI active?
- Yes — Mason Bias's NPI (1912982794) is active in the NPPES registry as of the last update on 2013-04-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.