Quick answers
- Does Gregory L. Mayer Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory L. Mayer Jr. 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 Gregory L. Mayer Jr. see?
- In 2024, CMS data shows 273 Original Medicare patients and 288 services for Gregory L. Mayer Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Gregory L. Mayer Jr.'s NPI number?
- 1184291262. 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 Gregory L. Mayer Jr., 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 | 273 |
|---|---|
| Services billed to Medicare | 288 |
| Different services or procedures | 52 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Anesthesia for lens surgery (00142)41 services
- Anesthesia for other procedure on large bowel using an endoscope (00811)31 services
- Anesthesia for procedure for total knee joint replacement (01402)26 services
- Anesthesia for procedure on small and large bowel using an endoscope (00813)21 services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)16 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%
- Arthritis62%
- Ischemic heart disease44%
- Diabetes42%
- Chronic kidney disease34%
Hospitals where Gregory L. Mayer Jr. works
Medicare's Facility Affiliation Data lists Gregory L. Mayer Jr. at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Bayhealth Hospital, Sussex CampusMilford, DE · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 080009
- Tidalhealth Nanticoke, Inc.Seaford, DE · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 080006
- Tidalhealth Peninsula Regional, IncSalisbury, MD · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 210019
Practice locations
Addresses where Gregory L. Mayer Jr. is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 100 Wellness WayMilford, DE 19963 (302) 430‑5738
- 424 Savannah RdLewes, DE 19958 (302) 441‑1078
- 640 S State StDover, DE 19901
- 701 N Clayton StWilmington, DE 19805 (214) 687‑0001
- 800 Prince Frederick BlvdPrince Frederick, MD 20678 (410) 535‑2270
Group practices
Medicare enrollment lists Gregory L. Mayer Jr. as a member of these groups (CMS data updated October 2, 2026).
- Bayhealth Medical Center, Inc413 clinicians in the group
- Anesthesia Company LLC378 clinicians in the group
- Northstar Anesthesia of Delaware LLC117 clinicians in the group
- Delaware Anesthesia Associates PA33 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Delaware →
Other nurse anesthetists in Milford
Clinicians with the same Medicare primary specialty in Milford, DE — not a recommendation.
Other clinicians in Bayhealth Medical Center, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1184291262 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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