Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

William N. May, MD

Individual provider Ophthalmology Physician · NPI 1700841046

William N. May, MD practises Ophthalmology in Loma Linda, California. Graduated from University of California, Davis School of Medicine in 1984, 42 years ago. Practices with Faculty Physicians and Surgeons of Llusm, a 1,308-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in California and Nevada.

Years since qualifying
42
Trained at
University of California, Davis School of Medicine
Licensed in
CA, NV
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

11370 Anderson St Ste 1800
Loma Linda, CA 92354-3450
Phone: (909) 558-2154
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 10424 S Eastern Ave Ste 100, Henderson, NV 89052-4293 — (702) 733-2020
  • 2110 E Flamingo Rd Ste 210, Las Vegas, NV 89119-5193 — (702) 733-2020
  • 2555 Box Canyon Dr, Las Vegas, NV 89128-0429 — (702) 733-2020

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence G56891 (CA)
Ophthalmology Physician Taxonomy 207W00000X · Licence 18490 (NV)

Record details

NPI number1700841046
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 19, 2006
Last updated in NPPESDecember 19, 2024
Certification dateDecember 19, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPHTHALMOLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, DAVIS SCHOOL OF MEDICINE
Graduated 1984 (42 years in practice)
Group practice Faculty Physicians And Surgeons Of Llusm — 1308 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations10 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Cataract surgery 33 times · 55th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients466
Services billed 911 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $977 17 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Faculty Physicians and Surgeons of Llusm

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1308 clinicians in the practice; 12 are shown here.

Other providers in Loma Linda