Doctor profile · Federal record
Dr. John Mascarenhas, MD
Hematology & Oncology Physician (CMS: Hematology) · New York, NY
- NPI 1376719104
- Accepts Medicare
- 24 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
1 Gustave L Levy Pl, Box 1079
New York, NY 100296500
(212) 241-1948 - Mailing address
-
One Gustave L Levy Place, Box 1079
New York, NY 100296500
Credentials & registration
- NPI registered
- May 2008 — 18 yrs on file
- Profile last updated
- July 7, 2008
- Year of graduation
- 2002 — 24 yrs since
- Specialty taxonomy
- 207RH0003X — NUCC code
- State license (1)
- New York #235966
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1376719104. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
548
Distinct HCPCS
3
Medicare allowed
$65,470
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 406 | 120 | $110 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 121 | 27 | $136 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 21 | 21 | $207 |
In context: peer comparison
Among 103 peers in this city , average services per provider: 411. This provider delivers 1.3× the peer median.Open Payments
Industry payments received
All-time total
$143,689
Transactions
87
Manufacturers
14
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Incyte Corporation | 37 | $41,682.64 | |
| SOBI, INC | 9 | $31,713.57 | |
| GlaxoSmithKline, LLC. | 6 | $13,713.84 | |
| Celgene Corporation | 9 | $12,646.30 | |
| PharmaEssentia USA Corporation | 3 | $11,662.00 | |
| E.R. Squibb & Sons, L.L.C. | 6 | $10,164.82 | |
| Sumitomo Pharma America, Inc. | 3 | $9,460.00 | |
| SWEDISH ORPHAN BIOVITRUM AB | 1 | $5,550.00 | |
| Karyopharm Therapeutics Inc. | 5 | $5,137.57 | |
| ABBVIE INC. | 2 | $889.95 | |
| Genmab U.S., Inc. | 1 | $785.00 | |
| Blueprint Medicines Corporation | 1 | $124.98 | |
| Geron Corporation | 1 | $87.38 | |
| Novartis Pharmaceuticals Corporation | 3 | $70.50 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
284
Patients
61
Total drug cost
$3,036,506
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Jakafi (Ruxolitinib Phosphate) | Brand | 120 | 24 | $2,229,969 |
| Allopurinol | Generic | 51 | 14 | $811 |
| Acyclovir | Generic | 29 | 12 | $659 |
| Hydroxyurea | Generic | 28 | 11 | $892 |
| Besremi (Ropeginterferon Alfa-2b-Njft) | Brand | 16 | 0 | $264,949 |
| Inrebic (Fedratinib Dihydrochloride) | Brand | 15 | 0 | $408,620 |
| Xarelto (Rivaroxaban) | Brand | 13 | 0 | $12,703 |
| Sprycel (Dasatinib) | Brand | 12 | 0 | $117,903 |
Hospital affiliations
Frequently asked questions
What is Dr. John Mascarenhas's medical specialty?
Dr. John Mascarenhas practices Hematology & Oncology Physician in New York, NY.
Where does Dr. John Mascarenhas practice?
Dr. John Mascarenhas practices at 1 Gustave L Levy Pl, New York, NY 100296500. Office phone: 2122411948.
What is Dr. John Mascarenhas's NPI?
Dr. John Mascarenhas's National Provider Identifier (NPI) is 1376719104, issued by NPPES.
Does Dr. John Mascarenhas accept Medicare assignment?
Yes. Dr. John Mascarenhas accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Mascarenhas commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); New patient office or other outpatient visit (HCPCS 99205). Source: CMS Medicare Physician & Other Practitioners file.