Medicare Enrolled
Dr. Larisa Mashensky, MD
Internal Medicine · New York, NY
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Mashensky from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Mashensky
Dr. Larisa Mashensky is an internal medicine specialist in New York, NY, with 20 years of NPI registration. Based on federal Medicare data, Dr. Mashensky performed 9,448 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Mashensky received a total of $14,400 from 59 pharmaceutical and/or device companies across 762 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Mashensky is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years of NPI registration
▲ Top 2% volume in NY
$14,400 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗9,448
Medicare services
Top 2% in NY for internal medicine
Not available
Unique patients (not deduplicated)
$29
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Iron sucrose injection (Venofer) An injection of iron sucrose used to replenish iron levels in the body. |
3,108 | $0 | $6 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
967 | $78 | $150 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
402 | $9 | $45 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
402 | $16 | $50 |
| Total T3 thyroid hormone test A blood test that measures the total amount of triiodothyronine (T3) hormone in your body. T3 is a thyroid hormone that helps regulate metabolism and energy levels. |
402 | $14 | $45 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
376 | $15 | $40 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
376 | $13 | $45 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
376 | $14 | $45 |
| COVID-19 antibody test A blood test that measures antibodies to severe acute respiratory syndrome coronavirus 2 (COVID-19). It detects the presence of immune response markers to the virus. |
332 | $41 | $100 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
260 | $8 | $25 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
254 | $12 | $50 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
254 | $108 | $200 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
219 | $29 | $80 |
| Intravenous infusion, 1 hour or less Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less. |
191 | $59 | $90 |
| Normal saline infusion, 250 cc Administration of 250 cubic centimeters of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater fluid. |
191 | $1 | $25 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
189 | $19 | $50 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
110 | $146 | $300 |
| PSA test (prostate cancer screening) | 100 | $18 | $30 |
| Chlamydia pneumoniae nucleic acid test A laboratory test that uses amplified probe techniques to detect the genetic material of Chlamydia pneumoniae bacteria in a sample. |
85 | $34 | $65 |
| Mycoplasma pneumoniae nucleic acid test A laboratory test that uses amplified probe techniques to detect the genetic material of Mycoplasma pneumoniae bacteria. |
85 | $34 | $75 |
| COVID-19 amplified DNA/RNA probe detection A laboratory test that uses amplified DNA or RNA probes to detect the presence of severe acute respiratory syndrome coronavirus 2 (COVID-19) antigen. |
85 | $50 | $60 |
| Infectious disease DNA/RNA test A laboratory test that uses a specific technique to detect the genetic material of an organism. This method amplifies the target DNA or RNA to identify the presence of the organism. |
85 | $34 | $130 |
| Nucleic acid test for central nervous system infection A laboratory test that detects the genetic material of an organism causing an infection in the central nervous system. |
82 | $408 | $500 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
68 | $1 | $25 |
| Quadrivalent influenza vaccine, cell-culture derived A flu shot containing four strains of influenza virus, produced using cell culture technology rather than eggs. This formulation is free from preservatives and antibiotics. |
56 | $33 | $50 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
55 | $35 | $50 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
35 | $174 | $350 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
33 | $74 | $125 |
| Non-hormonal chemotherapy injection This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue. |
30 | $66 | $96 |
| Pneumonia vaccine administration This procedure involves the injection of a vaccine to protect against pneumococcal disease. It is administered by a healthcare provider. |
30 | $35 | $49 |
| Ceftriaxone antibiotic injection This code represents the administration of ceftriaxone sodium, an antibiotic medication. The charge is calculated for every 250 mg of the drug administered. |
25 | $0 | $50 |
| Pneumococcal conjugate vaccine (PCV20) An intramuscular injection of the 20-valent pneumococcal conjugate vaccine. It is used to protect against diseases caused by Streptococcus pneumoniae bacteria. |
23 | $278 | $319 |
| Dehydroepiandrosterone (DHEA) hormone level test This test measures the level of dehydroepiandrosterone (DHEA) hormone in the blood. DHEA is a hormone produced by the adrenal glands. |
22 | $25 | $50 |
| Awake and drowsy EEG A test that records electrical activity in the brain while the patient is awake and drowsy. |
19 | $358 | $700 |
| Digital analysis of brain wave activity (EEG) This procedure involves the digital analysis of brain wave activity recorded via an electroencephalogram (EEG). It focuses on the technical interpretation of the digital data rather than the initial recording or supervision. |
19 | $254 | $700 |
| Psychological or neuropsychological test, first 30 minutes Administration of psychological or neuropsychological testing for the first 30 minutes. |
19 | $38 | $100 |
| Telephone medical discussion, 5-10 minutes A phone conversation with a physician lasting between 5 and 10 minutes to discuss medical matters. |
19 | $51 | $132 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
18 | $102 | $225 |
| Sex hormone binding globulin level test A blood test that measures the level of sex hormone binding globulin, a protein that binds to sex hormones in the bloodstream. |
17 | $21 | $50 |
| Total testosterone level test A blood test that measures the total amount of testosterone in your body. This hormone is important for various bodily functions in both men and women. |
17 | $25 | $40 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
12 | $13 | $50 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.
6.4% high complexity
34.7% medium
58.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$14,400
Total received (2018-2024)
Avg $2,057/year across 7 years
Top 7% in NY for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
59
Companies
762
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,581
2023
$1,226
2022
$1,401
2021
$1,846
2020
$2,896
2019
$2,958
2018
$2,494
Payments by company (2024)
GlaxoSmithKline, LLC.
$278
ABBVIE INC.
$185
AstraZeneca Pharmaceuticals LP
$159
GENZYME CORPORATION
$154
Amgen Inc.
$151
Bausch Health US, LLC
$96
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$91
PFIZER INC.
$63
Lilly USA, LLC
$60
Novartis Pharmaceuticals Corporation
$59
Novo Nordisk Inc
$57
Exact Sciences Corporation
$45
Takeda Pharmaceuticals U.S.A., Inc.
$33
Lundbeck LLC
$33
Kowa Pharmaceuticals America, Inc.
$27
Merck Sharp & Dohme LLC
$25
Azurity Pharmaceuticals, Inc.
$25
Otsuka America Pharmaceutical, Inc.
$22
Phathom Pharmaceuticals, Inc.
$19
Top 3 companies account for 39.3% of 2024 payments
All-time payments by company (2018-2024) ›
AstraZeneca Pharmaceuticals LP
$1,811
Amgen Inc.
$1,004
Novo Nordisk Inc
$994
AbbVie Inc.
$844
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$753
ABBVIE INC.
$681
Amarin Pharma Inc.
$664
GlaxoSmithKline, LLC.
$592
Allergan Inc.
$533
Janssen Pharmaceuticals, Inc
$517
PFIZER INC.
$493
Kowa Pharmaceuticals America, Inc.
$467
Takeda Pharmaceuticals U.S.A., Inc.
$459
Lilly USA, LLC
$448
MERZ NORTH AMERICA, INC.
$392
Supernus Pharmaceuticals, Inc.
$350
Novartis Pharmaceuticals Corporation
$336
Boehringer Ingelheim Pharmaceuticals, Inc.
$244
Allergan, Inc.
$232
Gilead Sciences, Inc.
$222
GENZYME CORPORATION
$190
Bausch Health US, LLC
$173
Horizon Therapeutics plc
$167
Synergy Pharmaceuticals Inc
$163
Shire North American Group Inc
$143
VIVUS LLC
$118
Alkermes, Inc.
$116
Bayer HealthCare Pharmaceuticals Inc.
$98
Merck Sharp & Dohme Corporation
$97
Regeneron Healthcare Solutions, Inc.
$86
ARBOR PHARMACEUTICALS, INC.
$86
Astellas Pharma US Inc
$84
Merck Sharp & Dohme LLC
$76
Sumitomo Pharma America, Inc.
$55
Circassia Pharmaceuticals Inc
$51
Horizon Pharma plc
$46
Exact Sciences Corporation
$45
Avanir Pharmaceuticals, Inc.
$39
Ironwood Pharmaceuticals, Inc
$39
Azurity Pharmaceuticals, Inc.
$38
Orexigen Therapeutics, Inc.
$38
SANOFI-AVENTIS U.S. LLC
$36
Almatica Pharma LLC
$34
Lundbeck LLC
$33
Biohaven Pharmaceutical Holding Company Ltd.
$30
Medtronic, Inc.
$27
Arbor Pharmaceuticals, Inc.
$26
Nevro Corp.
$23
Otsuka America Pharmaceutical, Inc.
$22
Boston Scientific Corporation
$22
SCYNEXIS, Inc.
$21
Daiichi Sankyo Inc.
$21
IRONWOOD PHARMACEUTICALS, INC
$20
Phathom Pharmaceuticals, Inc.
$19
EISAI INC.
$19
SCILEX PHARMACEUTICALS INC.
$18
Currax Pharmaceuticals LLC
$15
VistaPharm, Inc.
$15
Ultragenyx Pharmaceutical Inc.
$14
Top 3 companies account for 26.5% of all-time payments
Associated products mentioned in payments ›
AIRSUPRA · APLENZIN · Aimovig · Amitiza · BELSOMRA · BEVESPI AEROSPHERE · BREZTRI · BREZTRI AEROSPHERE · BYDUREON · BYSTOLIC · CHANTIX · CONTRAVE · CREON · CRYSVITA · Cologuard Collection Kit · Corlanor · DIFICID · DUEXIS · DUPIXENT · Dayvigo · ELIQUIS · EMGALITY · ENTRESTO · EUCRISA · EVENITY · Entyvio · FARXIGA · FASENRA · GENERAL PAIN MANAGEMENT · HORIZANT · Horizant · INJECTAFER · INTELLIS ADAPTIVESTIM · INVOKANA · JANUVIA · JARDIANCE · Kerendia · LEQVIO · LINZESS · LIVALO · LOREEV XR · LYBALVI · Linzess · Livalo · MOTEGRITY · MOUNJARO · MYDAYIS · MYFEMBREE · MYRBETRIQ · Motegrity · NAMZARIC · NUCALA · NUEDEXTA · NURTEC ODT · Omnia · Otezla · Ozempic · PANCREAZE · PENNSAID · PRALUENT · Prolia · QULIPTA · REXULTI · RYBELSUS · Repatha · Rybelsus · SEGLENTIS · SOLIQUA · SYMBICORT · SYNJARDY · TEZSPIRE · TOUJEO · TRELEGY ELLIPTA · TRINTELLIX · TROKENDI XR · TRULANCE · TRULICITY · TUDORZA PRESSAIR · Thyquidity · Tresiba · Trintellix · Trulance · UBRELVY · VERQUVO · VIBERZI · VIIBRYD · VOQUEZNA · VRAYLAR · VYVANSE · Vascepa · Victoza · Wegovy · XARELTO · XEOMIN · XIFAXAN · XIFAXANIBSD · ZENPEP · ZORYVE · ZTLido
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Geographic Context
Internal medicine physicians in nearby ZIP areas
11,022
County median income
$104,553
Nearest hospital to ZIP centroid (approximate)
BELLEVUE HOSPITAL CENTER
0.6 mi
0.6 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Mashensky is a mixed practice specialist, with above-average Medicare volume (top 2% in NY), with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Mashensky experienced with iron sucrose injection (venofer)?
Based on Medicare claims data, Dr. Mashensky performed 3,108 iron sucrose injection (venofer) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Mashensky receive payments from pharmaceutical companies?
Yes. Dr. Mashensky received a total of $14,400 from 59 companies across 762 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Mashensky's costs compare to other internal medicine physicians in New York?
Dr. Mashensky's average Medicare payment per service is $29. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Mashensky) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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