Michael Stock, MD
NPI 1730442500 · Ophthalmology Physician · O Fallon, IL
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Stock, MD is a Ophthalmology Physician provider in O Fallon, IL (NPI 1730442500).
Provider details
- NPI number
- 1730442500
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2016004847 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
4,200 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 | 1,195 | $37 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 1,085 | $429 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 783 | $161 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 612 | $122 |
| Removal of Recurring Cataract in Lens Capsule Using a Laser66821 | 269 | $268 |
| Complex Removal of Cataract With Insertion of Prosthetic Lens |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 96 | 79 |
| Latanoprost | 47 | 18 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 41 | 32 |
| Timolol Maleate | 37 | 21 |
| Ketorolac Tromethamine | 29 | 20 |
| Brimonidine Tartrate | 16 | 12 |
| Moxifloxacin Hclbrand: Moxifloxacin | 16 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$830 across 22 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
Additional practice locations (3)
- 900 W Temple Ave Bldg aEffingham, IL 62401-2121Phone: (618) 391-1660Fax: (618) 861-6003
- 201 E Pleasant StTaylorville, IL 62568-1562Phone: (618) 391-1660Fax: (618) 861-6003
- 12400 Olive Blvd Ste 200Saint Louis, MO 63141-5436Phone: (314) 391-9400Fax: (618) 861-6003
Registry dates
- Enumerated
- 2012-06-18
- Last updated
- 2025-12-11
- Certified
- 2025-12-11
Frequently asked questions
- What is Michael Stock's NPI number?
- Michael Stock's National Provider Identifier (NPI) is 1730442500, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Stock's specialty?
- Michael Stock is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Stock located?
- Michael Stock's practice location on file with NPPES is 705 Insight Ave, O Fallon, IL 62269-2146.
- What is Michael Stock's phone number?
- The practice phone number listed in the NPPES registry for Michael Stock is (618) 391-1660.
- Does Michael Stock accept Medicare?
- Michael Stock is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Stock's NPI active?
- Yes — Michael Stock's NPI (1730442500) is active in the NPPES registry as of the last update on 2025-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.