Medicare Enrolled
Dr. Megan Callahan, M.D.
Neurology · Attleboro, MA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Low-engagement
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. Callahan 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. Callahan
Dr. Megan Callahan is a neurology specialist in Attleboro, MA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Callahan performed 926 Medicare services across 771 unique beneficiaries.
Between the years covered by Open Payments, Dr. Callahan received a total of $22,712 from 76 pharmaceutical and/or device companies across 1122 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in neurology. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Callahan 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 in practice
▲ Top 16% volume in MA
$22,712 industry payments
Medicare Practice Summary
Medicare Utilization ↗926
Medicare services
Top 16% in MA for neurology
771
Unique beneficiaries
$101
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~46 Medicare services per year of practice
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 |
|---|---|---|---|
| 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. |
373 | $97 | $199 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
72 | $123 | $248 |
| 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. |
71 | $67 | $149 |
| Electromyography of arm or leg muscles A test that measures the electrical activity in the muscles of the arm or leg using a needle electrode. It helps evaluate the health of muscles and the nerve cells that control them. |
62 | $77 | $200 |
| New patient office visit, 15-29 minutes An initial office visit for a new patient lasting 15 to 29 minutes. This code is used when the total time spent on the date of the encounter meets this duration threshold. |
53 | $56 | $149 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
49 | $140 | $250 |
| Limited needle EMG of arm or leg muscles A test that measures the electrical activity in specific muscles of the arm or leg using a needle electrode. This limited study evaluates muscle function in a targeted area. |
44 | $51 | $200 |
| Nerve conduction studies, 5-6 tests A series of 5 to 6 tests that measure how well nerves send electrical signals. The procedure evaluates nerve function and helps identify damage or dysfunction. |
41 | $106 | $400 |
| Nerve conduction study, 9-10 studies A diagnostic test that measures how well nerves send electrical signals. It involves performing 9 to 10 separate nerve conduction studies to evaluate nerve function. |
32 | $174 | $600 |
| Neuropsychological test evaluation, first hour A professional assessment of cognitive and behavioral functioning using standardized tests. This service covers the initial hour of the evaluation process. |
19 | $99 | $180 |
| Psychological test administration, first 30 minutes A technician administers psychological or neuropsychological testing for the first 30 minutes. |
19 | $27 | $100 |
| Psychological test administration, each additional 30 minutes A technician administers psychological or neuropsychological testing. This code covers each additional 30-minute increment of administration time. |
19 | $28 | $100 |
| Awake and drowsy EEG A test that records electrical activity in the brain while the patient is awake and drowsy. |
16 | $310 | $600 |
| Nerve conduction studies, 7-8 tests A series of 7 to 8 nerve conduction tests to evaluate how well nerves are sending signals to muscles. |
15 | $144 | $500 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
15 | $43 | $100 |
| New patient office visit, complex (60-74 min) | 14 | $153 | $300 |
| EEG, extended monitoring A test that records electrical activity in the brain while the patient is both awake and asleep. |
12 | $367 | $650 |
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. A higher procedure volume generally indicates more experience with that procedure.
Industry Payment Transparency
Open Payments through 2024 ↗$22,712
Total received (2018-2024)
Avg $3,245/year across 7 years
Top 16% in MA for neurology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
76
Companies
1,122
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$22,654 (99.7%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$58 (0.3%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$4,762
2023
$4,116
2022
$4,001
2021
$3,468
2020
$1,812
2019
$1,961
2018
$2,592
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
ABBVIE INC.
$685
SK Life Science, Inc.
$361
PFIZER INC.
$352
Lilly USA, LLC
$340
Alexion Pharmaceuticals, Inc.
$288
Merz Pharmaceuticals, LLC
$259
Teva Pharmaceuticals USA, Inc.
$228
Biogen, Inc.
$218
Genentech USA, Inc.
$187
Novartis Pharmaceuticals Corporation
$174
Amneal Pharmaceuticals LLC
$168
UCB, Inc.
$167
Celgene Corporation
$162
Lundbeck LLC
$152
Neurelis, Inc.
$150
EMD Serono, Inc.
$150
ACADIA Pharmaceuticals Inc
$85
Otsuka America Pharmaceutical, Inc.
$76
Inspire Medical Systems, Inc.
$75
Sumitomo Pharma America, Inc.
$65
Vanda Pharmaceuticals Inc.
$64
MDD US Operations, LLC
$56
LivaNova USA, Inc.
$50
Grifols USA, LLC
$44
Mallinckrodt Hospital Products Inc.
$33
ANI Pharmaceuticals, Inc.
$30
ARGENX US, INC.
$26
GENZYME CORPORATION
$26
Neurocrine Biosciences, Inc.
$22
Ipsen Biopharmaceuticals, Inc
$21
CSL Behring
$21
WATERMARK MEDICAL, INC.
$13
Life Molecular Imaging Ltd
$13
Top 3 companies account for 29.3% of 2024 payments
All-time payments by company (2018-2024) ›
SK Life Science, Inc.
$1,424
LivaNova USA, Inc.
$1,201
UCB, Inc.
$1,095
Biogen, Inc.
$1,035
Novartis Pharmaceuticals Corporation
$994
ABBVIE INC.
$926
Lundbeck LLC
$861
EMD Serono, Inc.
$838
Celgene Corporation
$709
GENZYME CORPORATION
$707
Lilly USA, LLC
$674
PFIZER INC.
$673
Teva Pharmaceuticals USA, Inc.
$632
Alexion Pharmaceuticals, Inc.
$630
Janssen Pharmaceuticals, Inc
$604
Neurocrine Biosciences, Inc.
$539
Merz Pharmaceuticals, LLC
$530
Neurelis, Inc.
$519
Sunovion Pharmaceuticals Inc.
$519
Amgen Inc.
$455
Supernus Pharmaceuticals, Inc.
$446
Amneal Pharmaceuticals LLC
$399
Biohaven Pharmaceutical Holding Company Ltd.
$373
Eisai Inc.
$371
CSL Behring
$343
AbbVie Inc.
$323
Grifols USA, LLC
$318
Adamas Pharmaceuticals, Inc.
$311
Genentech USA, Inc.
$300
MDD US Operations, LLC
$291
Kyowa Kirin, Inc.
$227
US WorldMeds, LLC
$220
ACADIA Pharmaceuticals Inc
$207
Sumitomo Pharma America, Inc.
$179
Mallinckrodt Hospital Products Inc.
$176
EISAI INC.
$161
Vanda Pharmaceuticals Inc.
$152
Ipsen Biopharmaceuticals, Inc
$151
Acorda Therapeutics, Inc
$140
Biohaven Pharmaceuticals, Inc.
$135
ARGENX US, INC.
$133
Xeris Pharmaceuticals, Inc.
$126
Allergan, Inc.
$125
E.R. Squibb & Sons, L.L.C.
$121
Mallinckrodt LLC
$100
Otsuka America Pharmaceutical, Inc.
$90
BANNER LIFE SCIENCES, LLC
$88
ANI Pharmaceuticals, Inc.
$76
Inspire Medical Systems, Inc.
$75
IMPEL PHARMACEUTICALS INC.
$72
Upsher-Smith Laboratories LLC
$64
GE HealthCare
$64
SANOFI-AVENTIS U.S. LLC
$60
Bardy Diagnostics, Inc.
$59
Medtronic USA, Inc.
$56
CATALYST PHARMACEUTICALS, INC.
$54
NEUROPACE, INC.
$48
Horizon Therapeutics plc
$47
Merz North America, Inc.
$43
Impax Laboratories, Inc.
$42
MERZ NORTH AMERICA, INC.
$39
Avion Pharmaceuticals
$37
UPSHER-SMITH LABORATORIES LLC
$36
Avanir Pharmaceuticals, Inc.
$32
ARBOR PHARMACEUTICALS, INC.
$31
GE HEALTHCARE
$28
Life Molecular Imaging Ltd
$27
Genentech, Inc.
$24
Bayer HealthCare Pharmaceuticals Inc.
$23
Egalet US Inc
$19
Jazz Pharmaceuticals Inc.
$18
Pernix Therapeutics Holdings, Inc.
$18
WATERMARK MEDICAL, INC.
$13
Medtronic, Inc.
$13
Banner Life Sciences, LLC
$12
NeuroPace, Inc.
$12
Top 3 companies account for 16.4% of all-time payments
Associated products mentioned in payments ›
ACTHAR · ACTIVA · ADUHELM · AIMOVIG · AJOVY · AMYVID · APOKYN · APTIOM · ARES 620 UNICORDER · AUBAGIO · AUSTEDO · AVONEX · Aimovig · Apokyn · Austedo XR · BAFIERTAM · BOTOX · Betaseron · Briviact · CABLIVI · COMIRNATY · COPAXONE · Carnation Ambulatory Monitor · Dhivy · Dysport · EMGALITY · Enspryng · FIRDAPSE · Fycompa · GILENYA · GOCOVRI · Gamunex-C · Gocovri · HETLIOZ · Hizentra · Horizant · INBRIJA · INGREZZA · INSPIRE · KESIMPTA · KEVEYIS · KISUNLA · KYNMOBI · LATUDA · LEMTRADA · LYRICA · LYVISPAH · Leqembi · MAVENCLAD · MAYZENT · MYOBLOC · Mavenclad · NEURACEQ · NOURIANZ · NUEDEXTA · NUPLAZID · NURTEC ODT · Nayzilam · Neupro · Nourianz · OCTAGAM IMMUNE GLOBULIN (HUMAN) · ONGENTYS · ONGENTYS 50MG CAPSULES 30 · OXTELLAR XR · Ongentys · PANZYGA · PAXLOVID · PERCEPT PC BRAINSENSE · PLEGRIDY · PONVORY · PURIFIED CORTROPHIN GEL · Ponvory · QUDEXY XR Topiramate Extended Release Capsules · QULIPTA · REXULTI · REYVOW · RNS Neurostimulator Kit · RNS System · RYTARY · Rystiggo · SILENOR · SKYCLARYS · SOLIRIS · SPRIX · SUNOSI · TECFIDERA · TOSYMRA · TOSYMRA SUMATRIPTAN NASAL SPRAY · TROKENDI XR · TYSABRI · Trudhesa · UBRELVY · ULTOMIRIS · UPLIZNA · VALTOCO · VNS THERAPY SENTIVA MODEL 1000 GENERATOR · VNS Therapy · VNS Therapy SenTiva Model 1000 Generator · VUMERITY · VYEPTI · VYVGART · Vimpat · XADAGO · XCOPRI · XEOMIN · Xadago · Xeomin · ZAVZPRET · ZEPOSIA
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. 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 →
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Neurologists within 10 mi
143
Per 100K population
24.7
County median income
$84,198
Nearest hospital
STURDY MEMORIAL HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | 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. Callahan is a clinical cardiology specialist, with above-average Medicare volume (top 16% in MA), with low-engagement industry engagement in the top 16% of MA peers, 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. Callahan experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Callahan performed 373 office visit, established patient (30-39 min) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Callahan receive payments from pharmaceutical companies?
Yes. Dr. Callahan received a total of $22,712 from 76 companies across 1,122 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. 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. Callahan's costs compare to other neurologists in Attleboro?
Dr. Callahan's average Medicare payment per service is $101. 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. Callahan) 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 a long track record of practice, Medicare participation, and industry disclosure. 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?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): 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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