Quick answers
- Does Spencer D. Hayes accept Medicare assignment?
- Yes. Medicare's clinician data says Spencer D. Hayes 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 Spencer D. Hayes see?
- In 2024, CMS data shows 302 Original Medicare patients and 1,040 services for Spencer D. Hayes. This counts Original Medicare only and measures volume, not quality.
- What is Spencer D. Hayes's NPI number?
- 1952836728. 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 Spencer D. Hayes, 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 | 302 |
|---|---|
| Services billed to Medicare | 1,040 |
| Different services or procedures | 33 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient complete exam of visual system (92014)257 services
- Established patient problem focused exam of visual system (92012)161 services
- Measurement of corneal curvature and depth of eye (92136)148 services
- Imaging of optic nerve (92133)89 services
- Exam of visual field with extended testing (92083)87 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%
- Diabetes46%
- Arthritis43%
- Chronic kidney disease32%
- Ischemic heart disease29%
Practice locations
Addresses where Spencer D. Hayes is enrolled with Medicare (CMS data updated October 2, 2026).
- 800 McCullough AveSan Antonio, TX 78215 (210) 242‑7555
Group practices
Medicare enrollment lists Spencer D. Hayes as a member of this group (CMS data updated October 2, 2026).
- San Antonio Eye Center, PA34 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Other clinicians in San Antonio Eye Center, PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At Houston |
| Graduation year | 2017 (9 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952836728 |
| 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