What is Mack Sullivan's specialty?

Mack Sullivan (NPI 1881616068) is a Medicare-billing provider whose primary specialty is Internal Medicine in Eastchester, NY.

Where does Mack Sullivan practice?

Mack Sullivan practices in Eastchester, NY, based on the location reported in the CMS Medicare provider datasets for NPI 1881616068.

How much does Medicare pay Mack Sullivan?

Mack Sullivan (NPI 1881616068) received approximately $115K in total Medicare Part B payments, serving 186 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1881616068

Mack SullivanM.D.

PRACTICEFITNESS & RECOVERY, LLCSee all providers at this practice →

Internal MedicineEastchester, NYI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,049

Unique beneficiaries

—

Total services

3,180

Distinct HCPCS

Medicare payment

$110K

Peer benchmark

Total Medicare services vs. 7,864 Internal Medicine providers in NY — top quintile (cohort median 552).

PRESCRIBING · PART D · 2024

Total Rx claims

2,180

Beneficiaries

—

Total drug cost

$192K

Distinct drugs

Brand share

20.8%

Top prescribed drugs

Prednisone219 claims

Alprazolam109 claims

Amlodipine Besylate92 claims

Lisinopril92 claims

Ciprofloxacin Hcl86 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Mack Sullivan'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). 7 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
NEW YORK-PRESBYTERIAN/LAWRENCE HOSPITAL	129	474
Eugene Liu Pain Management · Dobbs Ferry, NY	98	2,654
WHITE PLAINS HOSPITAL MEDICAL CENTER	45	117
Michael Elia Orthopaedic Surgery · Bronxville, NY	43	233
Eastchester Volunteer Ambulance Corps Inc Ambulance Service Provider · Eastchester, NY	20	36
Steven Klein Diagnostic Radiology · New City, NY	13	32
MOUNT SINAI HOSPITAL	11	16

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