What is John Hemphill's specialty?

John Hemphill (NPI 1912188897) is a Medicare-billing provider whose primary specialty is Interventional Cardiology in Chattanooga, TN.

Where does John Hemphill practice?

John Hemphill practices in Chattanooga, TN, based on the location reported in the CMS Medicare provider datasets for NPI 1912188897.

How much does Medicare pay John Hemphill?

John Hemphill (NPI 1912188897) received approximately $128K in total Medicare Part B payments, serving 733 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1912188897

John HemphillMD

PRACTICEMEMORIAL HEART INSTITUTE, LLCSee all providers at this practice →

Interventional CardiologyChattanooga, TNI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,495

Unique beneficiaries

—

Total services

2,090

Distinct HCPCS

Medicare payment

$119K

Peer benchmark

Total Medicare services vs. 134 Interventional Cardiology providers in TN — above median (cohort median 1,964).

PRESCRIBING · PART D · 2024

Total Rx claims

7,545

Beneficiaries

—

Total drug cost

$1.4M

Distinct drugs

Brand share

24.3%

Top prescribed drugs

Carvedilol780 claims

Apixaban645 claims

Amlodipine Besylate528 claims

Rosuvastatin Calcium525 claims

Atorvastatin Calcium511 claims

QUALITY · MIPS · 2024

Final MIPS score

94.3

Quality

92.6

Cost

0.0

Improvement activities

40.0

Promoting interop.

93.2

Payment adjustment

0.81%

APM Entity

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$779

Payment records

By payment type

Food and Beverage$779

Top paying entities

Food and Beverage$779

REFERRAL NETWORK

Where John Hemphill'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). 43 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Carol Gruver Cardiology · Cape Coral, FL	76	142
LABORATORY CORPORATION OF AMERICA HOLDINGS	65	159
Dharmendrakumar Patel Cardiology · Chattanooga, TN	57	103
Steven Quarfordt Interventional Radiology · Chattanooga, TN	57	109
Brian Cooper Clinical Cardiac Electrophysiology · Fort Wayne, IN	55	122
Laboratory Corporation Of America Holdings Clinical Laboratory · Birmingham, AL	53	89
Robert Huang Interventional Cardiology · Chattanooga, TN	49	92
Noel Bergquist Diagnostic Radiology · Knoxville, TN	48	86
Jeffrey Alvis Diagnostic Radiology · Bristol, TN	46	82
Jose Barriocanal Diagnostic Radiology · Chattanooga, TN	43	76
County Of Hamilton Ambulance Service Provider · Chattanooga, TN	43	62
Justin Calvert Interventional Radiology · Mobile, AL	43	62

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