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

William C Summers, MD

Individual provider Internal Medicine Physician · NPI 1265471650

William C Summers, MD practises Internal Medicine in Saint Louis, Missouri. Graduated from University of Alabama School of Medicine in 1999, 27 years ago. Practices with Summers Healthcare LLC, a 2-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Missouri and Tennessee.

Years since qualifying
27
Trained at
University of Alabama School of Medicine
Licensed in
MO, TN
In the registry since
2006
Specialties on file
3
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

3915 Watson Rd Ste 202
Saint Louis, MO 63109-1251
Phone: (314) 244-3818
Fax: (888) 464-1108
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 6188 Mackenzie Valley Ct, Saint Louis, MO 63123-3477 — (314) 686-9714

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2007010580 (MO)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 2007010580 (MO)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 39419 (TN)

Record details

NPI number1265471650
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 4, 2006
Last updated in NPPESSeptember 29, 2026
Certification dateSeptember 6, 2023

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesINFECTIOUS DISEASE
Medical schoolUNIVERSITY OF ALABAMA SCHOOL OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice Summers Healthcare Llc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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.

Skin biopsy 1–10 times

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 patients127
Services billed 6,330 a service is one billed item, such as a visit, a test or a procedure
Average patient age64

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.

Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $11,736 6 payments
Travel and Lodging $3,343 8 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $1,208 87 payments · a meal or drink at a meeting or visit, not a fee
Education $39 1 payment · educational material or training, 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. Those with a page here are linked.

Colleagues at Summers Healthcare LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Saint Louis