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Internal Medicine - Hematology Specialists in Saint Louis, MO

Browse 16 Internal Medicine - Hematology providers listed in NPPES with a practice address in Saint Louis, Missouri.

16 Healthcare Providers

How Saint Louis compares with the U.S.

Saint Louis has 5.5 clinicians in Internal Medicine - Hematology per 100,000 residents, 12.3 times the U.S. rate of 0.5.

That is 16 active clinicians in Internal Medicine - Hematology with a practice address in Saint Louis, for a population of 288,512.

The Missouri rate is 0.3 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

100% of clinicians in Internal Medicine - Hematology in Saint Louis listed in the CMS Medicare file (13 of 13) accept Medicare assignment. That is similar to the Missouri share of 100%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

31% of clinicians in Internal Medicine - Hematology in Saint Louis listed in the CMS Medicare file (4 of 13) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the Missouri share of 38%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@t-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of November 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine - Hematology Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine - Hematology practitioners in Saint Louis, MO

Source: CMS PECOS
PECOS Enrolled Specialists 14 In Saint Louis, MO
Part B Lab & Imaging Eligible 14 Diagnostic Referrals
DME Ordering Eligible 14 Durable Medical Equipment
Home Health Agency Referrals 14 HHA Ordering Eligible
Showing 1โ€“16 of 16 providers
With recent CMS data first, then Aโ€“Z

Dr. Amber Afzal , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4500 Forest Park Ave, Div Im Hematology, 6th Fl, Saint Louis, MO 631082114
Phone: 3143627216
NPI Identifier 1831539808
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Dr. Vorachart Auethavekiat , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment
1 Barnes Jewish Hospital Plz, Div Im Hematology, Saint Louis, MO 631101003
Phone: 3143627216
NPI Identifier 1003872615
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Dr. Morey A Blinder , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4500 Forest Park Ave, Div Im Hematology, 5th Fl, Saint Louis, MO 631082114
Phone: 3143627216
NPI Identifier 1215953526
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Dr. Shaun B Hanson , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment
10012 Kennerly Rd Ste 102, Saint Louis, MO 63128
Phone: 3148496066
NPI Identifier 1831464130
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Dr. Amir Mahmoud , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment
1 Barnes Jewish Hospital Plz, Div Im Hematology, Saint Louis, MO 631101003
Phone: 3143627216
NPI Identifier 1619549078
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Dr. Elaine M Majerus , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment
1 Barnes Jewish Hospital Plz, Div Im Hematology, Saint Louis, MO 631101003
Phone: 3143627216
NPI Identifier 1326064544
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Dr. Stephen Tracy Oh , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment
4500 Forest Park Ave, Div Im Hematology, 6th Fl, Saint Louis, MO 631082114
Phone: 3143627216
NPI Identifier 1841494358
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Dr. Sana Saif Ur Rehman , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment
4500 Forest Park Ave, Div Im Hematology, 6th Fl, Saint Louis, MO 631082114
Phone: 3143627216
NPI Identifier 1558665844
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Dr. Kristen Marie Sanfilippo , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4500 Forest Park Ave, Div Im Hematology, 6th Fl, Saint Louis, MO 631082114
Phone: 3143627216
NPI Identifier 1528252483
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Dr. Joshua Ian Siner , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment
4921 Parkview Pl, Div Im Hematology, Ste 7b, Saint Louis, MO 631101032
Phone: 3143627216
NPI Identifier 1467944520
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Dr. Andrew Lee Young , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment
4500 Forest Park Ave, Div Im Hematology, 6th Fl, Saint Louis, MO 631082114
Phone: 3143627216
NPI Identifier 1831683929
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Dr. Amy Wei Wei Zhou , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment
4500 Forest Park Ave, Div Im Hematology, 6th Fl, Saint Louis, MO 631082114
Phone: 3143627216
NPI Identifier 1831331990
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Dr. Helen Onyeche Ajufo , MD

Internal Medicine - Hematology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4921 Parkview Pl, Div Im Hematology, Ste 7b, Saint Louis, MO 631101032
Phone: 3143627216
NPI Identifier 1497282115
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Dr. Scot G Hickman , MD

Internal Medicine - Hematology

Active NPI Status
1 Barnes Jewish Hospital Plz, Saint Louis, MO 631101003
Phone: 3143621700
NPI Identifier 1114976818
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Dr. Gregory D Longmore , MD

Internal Medicine - Hematology

Active NPI Status
4921 Parkview Pl, 7th Floor, Saint Louis, MO 631101032
Phone: 3147471171
NPI Identifier 1912924473
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Dr. Douglas M Tollefsen , MD

Internal Medicine - Hematology

Active NPI Status
4921 Parkview Pl Fl 7, 7th Fl, Saint Louis, MO 631101032
Phone: 3143628808
NPI Identifier 1679599815
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Frequently Asked Questions about Internal Medicine - Hematology in Saint Louis

How do I check a Internal Medicine - Hematology practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Missouri licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.