HealthcareDiscovery.AI / Doctors / Missouri / Hematology (Internal Medicine)

Hematologists (Internal Medicine) in Missouri

Data updated monthly · Last refresh October 2026

21 Hematology (Internal Medicine) providers practice in Missouri, including 5 (24%) offering telehealth. The largest concentration is in Saint Louis. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.

21providers
5telehealth
Saint Louistop city

Hematology (Internal Medicine) by city in Missouri

Choose a city to see providers there.

Hematology (Internal Medicine) in Saint Louis16 providers
Hematology (Internal Medicine) in Springfield2 providers
Hematology (Internal Medicine) in Kansas City1 providers
Hematology (Internal Medicine) in Columbia1 providers
Hematology (Internal Medicine) in Bridgeton1 providers

Where Hematologists (Internal Medicine) in Missouri practice

From CMS Medicare enrollment records covering 16 of the 21 providers listed here (76%). Providers who do not bill Medicare are not included in these figures.

6%solo or small practice (under 10 clinicians)
6%mid-size group (10 to 99)
88%large group or health system (100+)

Largest practice groups

Group (as registered with Medicare)Hematologists (Internal Medicine)All clinicians in groupMain city
Washington University112,968Saint Louis

Hospitals where they hold privileges

HospitalCityOwnershipCMS star ratingHematologists (Internal Medicine) affiliated
Barnes Jewish HospitalSaint LouisNonprofit4 of 511
Christian Hospital NortheastSaint LouisNonprofit4 of 55
Barnes-Jewish St Peters HospitalSaint PetersNonprofit3 of 54
Missouri Baptist Medical CenterSaint LouisNonprofit5 of 53
Barnes-Jewish West County HospitalCreve CoeurNonprofit5 of 53

Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.

Hematology (Internal Medicine) providers in Missouri

Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Brian Smith, MD
Bridgeton, MO · No drug or device payments recorded (2025) · (314) 209-5142
Dr. William Patterson, MD
Columbia, MO · No drug or device payments recorded (2025) · (573) 882-6163
Dr. Joseph Bennett, MD
Kansas City, MO · $295 in drug and device payments (2025) · Telehealth · (913) 588-1227
Dr. Amber Afzal, MD
Saint Louis, MO · $25 in drug and device payments (2025) · (314) 362-7216
Dr. Amir Mahmoud, MD
Saint Louis, MO · No drug or device payments recorded (2025) · (314) 362-7216
Dr. Amy Zhou, MD
Saint Louis, MO · $2,636 in drug and device payments (2025) · Telehealth · (314) 362-7216
Dr. Andrew Young, MD
Saint Louis, MO · $333 in drug and device payments (2025) · (314) 362-7216
Dr. Douglas Tollefsen, MD
Saint Louis, MO · No drug or device payments recorded (2025) · (314) 362-8808
Dr. Elaine Majerus, MD
Saint Louis, MO · $19,846 in drug and device payments (2025) · (314) 362-7216
Dr. Gregory Longmore, MD
Saint Louis, MO · No drug or device payments recorded (2025) · (314) 747-1171
Dr. Helen Ajufo, MD
Saint Louis, MO · $93 in drug and device payments (2025) · Telehealth · (314) 362-7216
Dr. Joshua Siner, MD
Saint Louis, MO · $934 in drug and device payments (2025) · (314) 362-7216
Dr. Kristen Sanfilippo, MD
Saint Louis, MO · $200 in drug and device payments (2025) · Telehealth · (314) 362-7216
Dr. Morey Blinder, MD
Saint Louis, MO · $21,805 in drug and device payments (2025) · Telehealth · (314) 362-7216
Dr. Sana Saif Ur Rehman, MD
Saint Louis, MO · No drug or device payments recorded (2025) · (314) 362-7216
Dr. Scot Hickman, MD
Saint Louis, MO · No drug or device payments recorded (2025) · (314) 362-1700
Dr. Shaun Hanson, MD
Saint Louis, MO · $2,935 in drug and device payments (2025) · (314) 849-6066
Dr. Stephen Oh, MD
Saint Louis, MO · $34,444 in drug and device payments (2025) · (314) 362-7216
Dr. Vorachart Auethavekiat, MD
Saint Louis, MO · No drug or device payments recorded (2025) · (314) 362-7216
Dr. Karim Welaya, M.D.
Springfield, MO · $359 in drug and device payments (2025) · (417) 875-3000
Dr. Paul Gill, M.D.
Springfield, MO · $25 in drug and device payments (2025) · (417) 883-5860

Common questions

How many Hematology (Internal Medicine) providers are in Missouri?

There are 21 Hematology (Internal Medicine) providers with active NPI records practicing in Missouri, according to federal NPPES data refreshed monthly.

Do Hematology (Internal Medicine) providers in Missouri offer telehealth?

Yes. 5 of the 21 Hematology (Internal Medicine) providers in Missouri (about 24%) report offering telehealth services in CMS data.

Which cities in Missouri have the most Hematology (Internal Medicine) providers?

Saint Louis (16), Springfield (2), Kansas City (1) have the highest concentration of Hematology (Internal Medicine) providers in Missouri.

Where does this data come from?

Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

Do most Hematologists (Internal Medicine) in Missouri work in independent practices or large health systems?

Among 16 Hematologists (Internal Medicine) in Missouri enrolled in Medicare, 6% bill through a solo or small practice with fewer than 10 clinicians, 6% through a mid-size group of 10 to 99, and 88% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Hematologists (Internal Medicine) in Missouri work at?

According to CMS facility affiliation records, the Missouri hospitals where the most Hematologists (Internal Medicine) hold privileges are Barnes Jewish Hospital in Saint Louis; Christian Hospital Northeast in Saint Louis; Barnes-Jewish St Peters Hospital in Saint Peters.

Related reading on HealthcareDiscovery.AI

Hematology (Internal Medicine) in all 50 states Search all 21 in the directory Ask Zach for help choosing

Related

Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Hematology (Internal Medicine) in Missouri? Get featured.