What is Thomas Defer's specialty?

Thomas Defer (NPI 1023036464) is a Medicare-billing provider whose primary specialty is Internal Medicine in Saint Louis, MO.

Where does Thomas Defer practice?

Thomas Defer practices in Saint Louis, MO, based on the location reported in the CMS Medicare provider datasets for NPI 1023036464.

How much does Medicare pay Thomas Defer?

Thomas Defer (NPI 1023036464) received approximately $8K in total Medicare Part B payments, serving 101 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1023036464

Thomas DeferMD

Internal MedicineSaint Louis, MOI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

107

Unique beneficiaries

—

Total services

117

Distinct HCPCS

Medicare payment

$5K

Peer benchmark

Total Medicare services vs. 1,563 Internal Medicine providers in MO — bottom quintile (cohort median 658).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$344

Distinct drugs

Brand share

0.0%

Top prescribed drugs

Gabapentin16 claims

Amlodipine Besylate14 claims

QUALITY · MIPS · 2024

Final MIPS score

84.2

Quality

71.6

Cost

75.7

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.39%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 260032

Hospital

REFERRAL NETWORK

Where Thomas Defer's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 5 inbound referrers · 14 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Melvin Blanchard Internal Medicine · Saint Louis, MO	22	46
Sandor Kovacs Cardiology · Saint Louis, MO	16	45
BJC HOME CARE SERVICES	12	23
Morey Blinder Hematology · Saint Louis, MO	11	27
Harvey Glazer Diagnostic Radiology · Saint Louis, MO	11	29

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
BARNES JEWISH HOSPITAL	363	1,368
FRASER, VICTORIA	42	85
Melvin Blanchard Internal Medicine · Saint Louis, MO	38	88
Sandor Kovacs Cardiology · Saint Louis, MO	23	63
Sanjeev Bhalla Diagnostic Radiology · Saint Louis, MO	14	30
Janice Semenkovich Diagnostic Radiology · Saint Louis, MO	14	58
BALFE, DENNIS	13	25
Morey Blinder Hematology · Saint Louis, MO	13	41
Labone Llc Clinical Laboratory · Lenexa, KS	12	39
Laura Colletti Internal Medicine · Saint Louis, MO	12	43
Rakhee Bhayani Internal Medicine · Saint Louis, MO	11	42
Robert Rifkin Internal Medicine · Saint Louis, MO	11	26

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events