What is John Mascarenhas's specialty?

John Mascarenhas (NPI 1376719104) is a Medicare-billing provider whose primary specialty is Hematology in New York, NY.

Where does John Mascarenhas practice?

John Mascarenhas practices in New York, NY, based on the location reported in the CMS Medicare provider datasets for NPI 1376719104.

How much does Medicare pay John Mascarenhas?

John Mascarenhas (NPI 1376719104) received approximately $55K in total Medicare Part B payments, serving 197 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1376719104

John MascarenhasMD

PRACTICETHE MOUNT SINAI HOSPITALSee all providers at this practice →

HematologyNew York, NYI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

211

Unique beneficiaries

—

Total services

610

Distinct HCPCS

Medicare payment

$52K

Peer benchmark

Total Medicare services vs. 102 Hematology providers in NY — above median (cohort median 474).

PRESCRIBING · PART D · 2024

Total Rx claims

325

Beneficiaries

—

Total drug cost

$2.0M

Distinct drugs

Brand share

42.2%

Top prescribed drugs

Ruxolitinib Phosphate78 claims

Allopurinol55 claims

Acyclovir46 claims

Posaconazole30 claims

Hydroxyurea30 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$144K

Payment records

By payment type

Consulting Fee$112K

Travel and Lodging$16K

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$14K

Food and Beverage$2K

Education$12

Top paying entities

Consulting Fee$112K

Travel and Lodging$16K

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$14K

Food and Beverage$2K

Education$12

REFERRAL NETWORK

Where John Mascarenhas'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 · 12 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MOUNT SINAI HOSPITAL	16	98
Ajai Chari Hematology-Oncology · New York, NY	16	38
Janice Gabrilove Medical Oncology · New York, NY	15	70
Joseph Gomes Cardiology · New York, NY	15	34
Lewis Silverman Medical Oncology · New York, NY	13	29
Hearn Cho Medical Oncology · New York, NY	13	56

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
MOUNT SINAI HOSPITAL	141	4,301
Bruce Petersen Pathology · New York, NY	30	167
LONGTINE, JANINA	28	117
Marina Kremyanskaya Medical Oncology · New York, NY	19	195
Quest Diagnostics Incorporated Clinical Laboratory · Clifton, NJ	18	102
Janice Gabrilove Medical Oncology · New York, NY	15	82
MOUNT SINAI HOSPITAL	14	76
Ronald Hoffman Hematology · New York, NY	13	59
Ajai Chari Hematology-Oncology · New York, NY	13	23
Hearn Cho Medical Oncology · New York, NY	11	76
FELDSTEIN, JULIE	11	53
Mary Salvatore Diagnostic Radiology · New York, NY	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