Quick answers
- Does Diane B. Heyman accept Medicare assignment?
- Medicare's clinician data says Diane B. Heyman may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Diane B. Heyman see?
- In 2024, CMS data shows 332 Original Medicare patients and 5,308 services for Diane B. Heyman. This counts Original Medicare only and measures volume, not quality.
- What is Diane B. Heyman's NPI number?
- 1013923663. 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 Diane B. Heyman, 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 | 332 |
|---|---|
| Services billed to Medicare | 5,308 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Removal of cataract with insertion of prosthetic lens (66984)3,775 services
- Established patient complete exam of visual system (92014)182 services
- Established patient problem focused exam of visual system (92012)52 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)43 services
- New patient complete exam of visual system (92004)30 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 blood pressure75%
- High cholesterol75%
- Arthritis35%
- Diabetes27%
- Ischemic heart disease20%
- Anxiety18%
Practice locations
Addresses where Diane B. Heyman is enrolled with Medicare (CMS data updated October 2, 2026).
- 220 E 1st StGibson City, IL 60936
Specialties
- Optometryprimary
Other optometrists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Ohio State University - College Of Optometry |
| Graduation year | 1983 (43 years since optometry school) |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1013923663 |
| 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