What is John Merwin's specialty?

John Merwin (NPI 1770562209) is a Medicare-billing provider whose primary specialty is Anesthesiology in Saint Louis, MO.

Where does John Merwin practice?

John Merwin practices in Saint Louis, MO, based on the location reported in the CMS Medicare provider datasets for NPI 1770562209.

How much does Medicare pay John Merwin?

John Merwin (NPI 1770562209) received approximately $20K in total Medicare Part B payments, serving 182 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1770562209

John MerwinMD

AnesthesiologySaint Louis, MOI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$6K

Peer benchmark

Total Medicare services vs. 757 Anesthesiology providers in MO — above median (cohort median 187).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

Final MIPS score

84.9

Quality

68.5

Cost

72.2

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.42%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where John Merwin'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). 6 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
LUCHTEFELD, GERALD	44	189
Tshiswaka Kayembe Internal Medicine · Saint Louis, MO	25	45
Kevin Hutcheson Certified Registered Nurse Anesthetist (CRNA) · Saint Louis, MO	13	19
Kulsoom Junaid Psychiatry · Saint Louis, MO	13	27
HANDOYO, FRANS	12	25
Kumaran Chinnappan General Surgery · Saint Louis, MO	11	43

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

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