What is William Chastain's specialty?

William Chastain (NPI 1891980777) is a Medicare-billing provider whose primary specialty is Internal Medicine in Greenville, SC.

Where does William Chastain practice?

William Chastain practices in Greenville, SC, based on the location reported in the CMS Medicare provider datasets for NPI 1891980777.

How much does Medicare pay William Chastain?

William Chastain (NPI 1891980777) received approximately $75K in total Medicare Part B payments, serving 332 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1891980777

William ChastainMD

Internal MedicineGreenville, SCI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

569

Unique beneficiaries

—

Total services

1,030

Distinct HCPCS

Medicare payment

$73K

Peer benchmark

Total Medicare services vs. 1,190 Internal Medicine providers in SC — above median (cohort median 884).

PRESCRIBING · PART D · 2024

Total Rx claims

163

Beneficiaries

—

Total drug cost

$7K

Distinct drugs

Brand share

16.0%

Top prescribed drugs

Prednisone31 claims

Cefdinir24 claims

Metoprolol Succinate17 claims

Amlodipine Besylate14 claims

Carvedilol14 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$57

Payment records

By payment type

Food and Beverage$57

Top paying entities

Food and Beverage$57

REFERRAL NETWORK

Where William Chastain'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). 50 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Michael Enright Diagnostic Radiology · Spartanburg, SC	78	136
PARNES, NEIL	67	113
KAVANAGH, JOSEPH	61	101
Kelan Brown Diagnostic Radiology · Spartanburg, SC	41	74
KURKJIAN, JOSEPH	41	74
David Pelino Diagnostic Radiology · Spartanburg, SC	34	69
Anthony Sanchez Orthopedic Surgery · Spartanburg, SC	30	104
Mary Leonardi Physician Assistant · Greenville, SC	29	43
NPI 1427036144	26	95
David Cunningham Nurse Practitioner · Spartanburg, SC	26	42
HOMESTEAD HOSPICE OF GREENVILLE, LLC	25	110
Joan Burkhardt Diagnostic Radiology · Spartanburg, SC	25	51

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