Dr. Thomas Gregory Chaisson , MD
General Practice • Thibodaux, LA
142 Rue Marguerite
Thibodaux, LA 703016738
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Thomas Chaisson is listed in NPPES under General Practice.
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NPI assigned on October 19, 2005; this date does not establish years in practice.
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Published CMS data list 6,904 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 1,164 service units.
- G2211 — Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's: 933 service units.
- 36415 — Insertion of needle into vein for collection of blood sample: 921 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 29 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 13,321 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Levothyroxine Sodium — 1,040 prescription fills, including refills.
- Alprazolam — 446 prescription fills, including refills.
- Pantoprazole Sodium — 421 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 187 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 90% of clinicians listed under General Practice in Louisiana (2024, 36 clinicians with data). Median for this group: 736. Middle half: 162 to 3,142.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 7,144 in 2020 to 6,904 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
142 Rue Marguerite
Thibodaux, LA 703016738
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Thibodaux Internal Medicine Associates,Inc.. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Louisiana State University School Of Medicine In New Orleans
1991
What Public CMS Data Show
General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
816 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $258,965 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $176,533 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
24,698 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$664,191 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $360.88 across 20 records.
By nature of payment
- Food and Beverage: $360.88 across 20 records.
Reporting-company totals (3 largest of 14)
- Novo Nordisk Inc: $64.50 across 4 records.
- Sumitomo Pharma America, Inc.: $49.13 across 3 records.
- ABBVIE INC.: $45.82 across 2 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
35 years (graduated 1991)
CMS Doctors and Clinicians data list 1991 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2005
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Chaisson has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Chaisson as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Thibodaux and Louisiana
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 90% of clinicians listed under General Practice in Louisiana (2024, 36 clinicians with data). Median for this group: 736. Middle half: 162 to 3,142.
Too few clinicians listed under General Practice in Thibodaux have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 85% of clinicians listed under General Practice in Louisiana (2024, 36 clinicians with data). Median for this group: $38,618. Middle half: $9,127 to $108,055.
Too few clinicians listed under General Practice in Thibodaux have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 85% of clinicians listed under General Practice in Louisiana (2024, 36 clinicians with data). Median for this group: $27,620. Middle half: $6,541 to $83,245.
Too few clinicians listed under General Practice in Thibodaux have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 95% of clinicians listed under General Practice in Louisiana (2024, 64 clinicians with data). Median for this group: 313. Middle half: 81 to 3,802.
Too few clinicians listed under General Practice in Thibodaux have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under General Practice in Louisiana (2024, 64 clinicians with data). Median for this group: $21,988. Middle half: $2,504 to $395,213.
Too few clinicians listed under General Practice in Thibodaux have Medicare Part D data for 2024 to compare.
3 active clinicians are listed under General Practice with a practice address in Thibodaux, LA (146 in Louisiana).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services stayed about the same: 7,144 in 2020 and 6,904 in 2024.
- 2020: 7,144
- 2021: 7,195
- 2022: 6,968
- 2023: 5,976
- 2024: 6,904
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Medicare-allowed amount
Medicare-allowed amount decreased 29% from $365,483 in 2020 to $258,965 in 2024.
- 2020: $365,483
- 2021: $447,161
- 2022: $294,711
- 2023: $248,976
- 2024: $258,965
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Paid by Medicare
Paid by Medicare decreased 36% from $276,880 in 2020 to $176,533 in 2024.
- 2020: $276,880
- 2021: $347,920
- 2022: $202,381
- 2023: $171,140
- 2024: $176,533
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 18% from 16,250 in 2020 to 13,321 in 2024.
- 2020: 16,250
- 2021: 16,313
- 2022: 16,129
- 2023: 14,282
- 2024: 13,321
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30-day fills
30-day fills stayed about the same: 26,473 in 2020 and 24,698 in 2024.
- 2020: 26,473
- 2021: 27,110
- 2022: 27,436
- 2023: 25,308
- 2024: 24,698
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Part D drug cost
Part D drug cost stayed about the same: $674,218 in 2020 and $664,191 in 2024.
- 2020: $674,218
- 2021: $790,626
- 2022: $799,613
- 2023: $772,969
- 2024: $664,191
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $562.76 in 2021 to $360.88 in 2025.
- 2021: $562.76
- 2022: $454.73
- 2023: $479.29
- 2024: $593.14
- 2025: $360.88
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): 20 records totaling $360.88.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Vanda Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
|
FANAPT | General | $28.33 |
| Dexcom, Inc. |
Food and Beverage
In-kind items and services
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Dexcom G6 Transmitter | General | $24.52 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
VRAYLAR | General | $24.37 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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The Cologuard Plus Collection Kit | General | $21.63 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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VRAYLAR | General | $21.45 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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— | General | $19.60 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Ozempic | General | $19.02 |
| Cranial Technologies, Inc |
Food and Beverage
Cash or cash equivalent
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Doc Band | General | $18.10 |
| Sumitomo Pharma America, Inc. |
Food and Beverage
In-kind items and services
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GEMTESA | General | $17.21 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Ozempic | General | $17.03 |
| Sumitomo Pharma America, Inc. |
Food and Beverage
In-kind items and services
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GEMTESA | General | $16.55 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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EVENITY | General | $16.46 |
| Abbott Laboratories |
Food and Beverage
In-kind items and services
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FREESTYLE LIBRE | General | $16.21 |
| Sumitomo Pharma America, Inc. |
Food and Beverage
In-kind items and services
|
GEMTESA | General | $15.37 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
ELIQUIS | General | $15.00 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Saxenda | General | $14.68 |
| SHIELD THERAPEUTICS INC |
Food and Beverage
In-kind items and services
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ACCRUFER | General | $14.53 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Wegovy | General | $13.77 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC |
Food and Beverage
In-kind items and services
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XIFAXAN | General | $13.54 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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JARDIANCE | General | $13.51 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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1,164 | 602 | $177.51 | $83.84 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
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933 | 539 | $25.00 | $15.47 |
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36415
Insertion of needle into vein for collection of blood sample
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921 | 517 | $21.00 | $8.60 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
885 | 491 | $120.00 | $70.37 |
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J3301
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
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803 | 164 | $4.00 | $0.96 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
|
313 | 313 | $150.00 | $37.79 |
|
87804
Detection test by immunoassay with direct visual observation for influenza virus
|
274 | 120 | $30.00 | $16.22 |
|
96372
Injection of drug or substance under skin or into muscle
|
242 | 183 | $31.00 | $13.00 |
|
G0008
Administration of influenza virus vaccine
|
188 | 187 | $49.68 | $30.15 |
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90653
Influenza vaccine, inactivated
|
182 | 182 | $100.00 | $81.82 |
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81002
Urinalysis, manual test
|
158 | 114 | $10.00 | $3.37 |
|
83036
Hemoglobin a1c level
|
150 | 135 | $25.00 | $9.30 |
|
87811
Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19)
|
139 | 121 | $70.00 | $40.55 |
|
99497
Advance care planning, first 30 minutes
|
73 | 73 | $100.00 | $4.73 |
|
71046
X-ray of chest, 2 views
|
70 | 64 | $50.00 | $30.03 |
|
G0180
Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and
|
62 | 47 | $70.00 | $49.03 |
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99496
Transitional care management services for problem of high complexity
|
58 | 52 | $325.00 | $113.63 |
|
82043
Urine microalbumin (protein) level
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43 | 43 | $40.00 | $5.66 |
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G0179
Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a
|
38 | 15 | $60.00 | $38.14 |
|
87880
Detection test by immunoassay with direct visual observation for streptococcus, group a (strep)
|
28 | 28 | $49.00 | $16.20 |
|
99495
Transitional care management services for problem of at least moderate complexity
|
25 | 24 | $200.00 | $92.48 |
|
G0438
Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit
|
25 | 25 | $200.00 | $102.68 |
|
99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
|
24 | 21 | $75.00 | $56.78 |
|
J1885
Injection, ketorolac tromethamine, per 15 mg
|
24 | 12 | $9.00 | $0.57 |
|
90677
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use
|
21 | 21 | $350.00 | $289.89 |
(top 25 shown)
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Levothyroxine Sodium | Levothyroxine Sodium | 1,040 | 73,058 | $8,595.60 | 228 |
| Alprazolam | Alprazolam | 446 | 12,753 | $1,448.38 | 78 |
| Pantoprazole Sodium | Pantoprazole Sodium | 421 | 24,542 | $3,890.70 | 86 |
| Amlodipine Besylate | Amlodipine Besylate | 349 | 20,364 | $1,515.53 | 68 |
| Gabapentin | Gabapentin | 340 | 16,076 | $3,328.64 | 64 |
| Montelukast Sodium | Montelukast Sodium | 270 | 16,200 | $2,137.61 | 55 |
| Citalopram Hbr | Citalopram Hydrobromide | 268 | 16,592 | $1,268.20 | 62 |
| Atorvastatin Calcium | Atorvastatin Calcium | 266 | 18,846 | $2,733.33 | 64 |
| Metformin Hcl | Metformin Hcl | 266 | 21,240 | $1,975.60 | 70 |
| Glimepiride | Glimepiride | 244 | 16,540 | $2,045.73 | 53 |
| Lisinopril | Lisinopril | 226 | 16,000 | $1,442.07 | 56 |
| Losartan Potassium | Losartan Potassium | 221 | 13,364 | $1,986.47 | 50 |
| Pravastatin Sodium | Pravastatin Sodium | 221 | 12,965 | $2,329.73 | 43 |
| Omeprazole | Omeprazole | 210 | 13,615 | $1,644.03 | 46 |
| Paroxetine Hcl | Paroxetine Hcl | 205 | 9,795 | $1,700.77 | 38 |
| Metoprolol Succinate | Metoprolol Succinate | 204 | 14,579 | $2,427.49 | 50 |
| Hydrochlorothiazide | Hydrochlorothiazide | 201 | 14,144 | $999.67 | 51 |
| Escitalopram Oxalate | Escitalopram Oxalate | 196 | 12,810 | $1,862.48 | 43 |
| Sertraline Hcl | Sertraline Hcl | 182 | 10,389 | $1,422.65 | 39 |
| Clonazepam | Clonazepam | 170 | 5,468 | $655.52 | 27 |
| Memantine Hcl | Memantine Hcl | 158 | 7,742 | $3,444.22 | 27 |
| Allopurinol | Allopurinol | 154 | 11,522 | $1,589.44 | 40 |
| Eliquis | Apixaban | 145 | 3,878 | $75,859.89 | 16 |
| Simvastatin | Simvastatin | 144 | 10,780 | $957.79 | 30 |
| Tamsulosin Hcl | Tamsulosin Hcl | 140 | 9,957 | $1,363.79 | 41 |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-04-03NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20041230000152
LA
6204894785
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Thibodaux Internal Medicine Associates,inc.
142 Rue Marguerite, Thibodaux, LA 703016708
Phone: 9854462131
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dietitian, Registered
General Practice
Doctor of Medicine (M.D.)
General Practice
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Internal Medicine (license number reported to NPPES: LA MD.09201R)
NPI status registered as active in NPPES database
Registered at 142 RUE MARGUERITE, THIBODAUX, LA 703016738 (Tel: 9854462131)
Registered at 142 RUE MARGUERITE, SUITE B, THIBODAUX, LA 703014957 (Tel: 9854462131)
Recorded as THOMAS CHAISSON, MD
General Practice (license number reported to NPPES: LA 09201R)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other General Practices in Thibodaux
Healthcare providers in ThibodauxMailing Address
142 Rue Marguerite, Suite B
Thibodaux, LA 703014957
Phone: 9854462131