Quick answers
- Does Dirk F. Massie accept Medicare assignment?
- Yes. Medicare's clinician data says Dirk F. Massie accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Dirk F. Massie see?
- In 2024, CMS data shows 95 Original Medicare patients and 670 services for Dirk F. Massie. This counts Original Medicare only and measures volume, not quality.
- What is Dirk F. Massie's NPI number?
- 1972510345. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Dirk F. Massie, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 95 |
|---|---|
| Services billed to Medicare | 670 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Photography of the retina (92250)72 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)46 services
- Established patient complete exam of visual system (92014)38 services
- Exam of visual field with extended testing (92083)29 services
- Measurement of retinal and optic nerve function (92273)12 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol73%
- High blood pressure65%
- Arthritis39%
- Ischemic heart disease23%
- Diabetes22%
- Chronic kidney disease19%
Practice locations
Addresses where Dirk F. Massie is enrolled with Medicare (CMS data updated October 2, 2026).
- 101 N Maple StBrighton, IL 62012 (618) 372‑7000
- 277 W Veterans Memorial PkwyWarrenton, MO 63383 (618) 234‑3053
- 4111 N Illinois StSwansea, IL 62226
Group practices
Medicare enrollment lists Dirk F. Massie as a member of these groups (CMS data updated October 2, 2026).
- Pec Brighton PLLC4 clinicians in the group
- Performance Eyecare PC3 clinicians in the group
- Pec Warrenton LLC2 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Brighton
Clinicians with the same Medicare primary specialty in Brighton, IL — not a recommendation.
Other clinicians in Pec Brighton PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Saint Louis University School Of Medicine |
| Graduation year | 2001 (25 years since optometry school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972510345 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians