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Kelsey-Seybold Clinic

Houston, US Β· 4,055 employees on LinkedIn Β· 1 known investors

Kelsey-Seybold Clinic is a multispecialty healthcare provider offering primary care, pediatric, and specialty medical services across more than 40 locations, with online appointment booking and virtual urgent care. It serves patients in the Houston, Texas area and accepts Medicare Advantage plans.

Also known as Kelsey-Seybold

Investors Β· 1

Company profile

researched Aug 2026

Kelsey-Seybold Clinic is a multispecialty medical group serving the Greater Houston, Texas area. It brings primary care physicians, specialists and medical technology together in shared locations to deliver coordinated care, with a shared electronic medical record that follows patients to any Kelsey-Seybold physician or site. The group lists more than 65 medical specialties, ranging from allergy, cardiology and dermatology to orthopedics, oncology, sleep medicine and surgical subspecialties, and states that no referral is needed to see most specialists.

Services span adult primary care, pediatrics, obstetrics and gynecology, ambulatory surgery centers, a cancer center, breast diagnostic center, radiology, pharmacy (Kelsey Pharmacy), travel medicine, executive health and concierge health. Patients can book adult primary care and pediatric appointments online through AppointmentsNOW without a login, or schedule primary care and most specialty appointments through the MyKelseyOnline patient portal; a 24/7 phone line and an after-hours nurse hotline are also available. Virtual care includes on-demand Urgent Care and Primary Care video visits as well as scheduled virtual visits for new and existing patients.

The organization also operates corporate-facing offerings, including a KelseyCare employer plan and a KelseyCare Advantage retiree plan, and accepts many Medicare Advantage plans along with most major insurance plans.

Founding story

Kelsey-Seybold Clinic was founded in 1949 by Dr. Mavis P. Kelsey, a fifth-generation Texan who returned from practicing medicine at the Mayo Clinic to start his own clinic in the then-emerging Texas Medical Center. He set out to build a multispecialty group modeled on the Mayo Clinic approach to care, combining primary care physicians and specialists in one location. Dr. Kelsey was the first endocrinologist recruited by The University of Texas MD Anderson Cancer Center and administered the first dose of radioiodine to a patient in Houston in 1949.

Business model

Kelsey-Seybold operates as a physician-led multispecialty clinic network delivering outpatient and ambulatory services directly to patients, billing commercial insurance, Medicare Advantage and employer health plans. It also markets employer and retiree health plan products (KelseyCare Employer Plan, KelseyCare Advantage Retiree Plan) and corporate services such as executive health.

Revenue is derived from patient care services delivered across primary care, specialty care, ambulatory surgery, cancer care, imaging and pharmacy, reimbursed through accepted commercial insurance, Medicare Advantage and employer-sponsored plan arrangements.

Traction

The provider directory lists 1,129 doctors and the location finder lists 45 locations across Greater Houston. The clinic reported being named Houston Chronicle "Best of the Best" for Primary Care.

Latest developments

Kelsey-Seybold adopted the Luma Health patient engagement platform, with its CIO describing the platform as a core operating system for the clinic's strategic objectives and citing its bi-directional Epic integration; Luma Health announced a $130 million Series C in November 2021.

β–ΈFull profile β€” market position, technology, go-to-market, geography, history

Market position

Positioned as a large, long-established multispecialty group practice in the Houston market, with 65+ specialties, 45 locations and more than 1,100 physicians; it was named Houston Chronicle "Best of the Best" for Primary Care.

Coordinated multispecialty care under one organization with a unified electronic medical record accessible at any location, no referral required for most specialists, same-day and next-day appointments, 24/7 scheduling access, and on-demand virtual urgent and primary care.

Technology

The clinic uses a secure electronic medical record shared across all locations and physicians, with Epic cited by its CIO as the underlying system. Patient-facing digital tools include the MyKelseyOnline portal, AppointmentsNOW online scheduling, on-demand and scheduled video visits, and a patient engagement platform from Luma Health that integrates bi-directionally with Epic.

Go-to-market

Direct-to-patient acquisition through its clinic network, online provider and location search, online self-scheduling via AppointmentsNOW and the MyKelseyOnline portal, a 24/7 scheduling line, after-hours nurse hotline, virtual urgent care, and health-content marketing through its Healthy Living Resources and Doc Talk blog and newsroom.

Patients in the Greater Houston area, including adults, children and seniors on Medicare Advantage plans, plus employers purchasing group health plan and corporate/executive health services.

Geography

Greater Houston, Texas, with 45 locations spanning from Huntsville to Lake Jackson (57 individual location listings), including campuses, clinics, cancer centers and surgery centers.

History

Established in 1949 in the Texas Medical Center, the clinic grew into a multispecialty group practice serving the Houston region. In 1956, Dr. Mavis Kelsey and his brother, Dr. John Kelsey, founded the Kelsey Research Foundation. Dr. Mavis Kelsey died on November 12, 2013, at the age of 101. The organization describes itself as having roughly seven decades of operating history and today lists 45 locations from Huntsville to Lake Jackson and 1,129 physicians.

Compiled by commissioned research from 8 cited public sources β€” announcements, filings, and press listed under research sources below.

Key figures

latest reported
Location listings displayedJan 202657 listings
LocationsJan 202645 locations
Medical specialties offeredJan 202665+
Physicians listedJan 20261,129 doctors

Company-reported or press-reported figures, each dated to when it was claimed β€” not independently audited.

Timeline Β· 5

launches, deals, and filings
Jan 2026
Named Houston Chronicle "Best of the Best" for Primary Care

source β†—

Nov 2021
Kelsey-Seybold adopts Luma Health patient engagement platform

Kelsey-Seybold's VP of Information Systems and CIO described Luma Health's platform, including bi-directional Epic integration, as a core operating system for the clinic, in connection with Luma Health's Series C announcement.

source β†—

Nov 2013
Founder Dr. Mavis P. Kelsey dies at 101

source β†—

Jan 1956
Kelsey Research Foundation founded

Dr. Mavis Kelsey and his brother, Dr. John Kelsey, founded the Kelsey Research Foundation.

source β†—

Jan 1949
Kelsey-Seybold Clinic founded by Dr. Mavis P. Kelsey in the Texas Medical Center

Dr. Mavis Kelsey returned from the Mayo Clinic and established Kelsey-Seybold Clinic in Houston as a multispecialty group practice.

source β†—

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

β–ΈResearch sources Β· 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Kelsey-Seybold Clinic do?
Houston-based multispecialty physician group offering primary, pediatric, specialty and virtual care across 45 locations.
Who are Kelsey-Seybold Clinic's investors?
Kelsey-Seybold Clinic's investors include TPG.
Where is Kelsey-Seybold Clinic headquartered?
Kelsey-Seybold Clinic is headquartered in Houston, US.