Dr. Timothy Diaz , DO
Surgery • Terre Haute, IN
1818 N 6th St
Terre Haute, IN 478044021
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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NPI assigned on May 3, 2019; this date does not establish years in practice.
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Published CMS data list 376 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:
- 99203 — New patient outpatient office visit: 89 service units.
- 99232 — Subsequent hospital care with moderate levelof medical decision making: 54 service units.
- 99213 — Established patient outpatient office visit: 47 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 12 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 40 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:
- Oxycodone Hcl — 27 prescription fills, including refills.
- Sutab (Sod Sulf/Pot Chloride/Mag Sulf) — 13 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 the full table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 75% of clinicians listed under Surgery in Indiana (2024, 373 clinicians with data). Median for this group: 193. Middle half: 103 to 346.
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 D prescriptions went from 39 in 2020 to 40 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
1818 N 6th St
Terre Haute, IN 478044021
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Nova Southeastern College Of Osteo Medicine
2019
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
241 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 $38,514 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 $30,775 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
40 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
$2,180 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: $1,043.14 across 10 records.
By nature of payment
- Food and Beverage: $608.14 across 9 records.
- Education: $435.00 across 1 record.
Reporting-company totals (3 largest of 8)
- Medtronic, Inc.: $435.00 across 1 record.
- W. L. Gore & Associates, Inc.: $299.95 across 3 records.
- Shockwave Medical, Inc: $107.45 across 1 record.
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
7 years (graduated 2019)
CMS Doctors and Clinicians data list 2019 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
2019
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.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
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.
Compared with the same specialty in Terre Haute and Indiana
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 75% of clinicians listed under Surgery in Indiana (2024, 373 clinicians with data). Median for this group: 193. Middle half: 103 to 346.
Too few clinicians listed under Surgery in Terre Haute have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 70% of clinicians listed under Surgery in Indiana (2024, 373 clinicians with data). Median for this group: $22,506. Middle half: $11,506 to $42,445.
Too few clinicians listed under Surgery in Terre Haute have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 70% of clinicians listed under Surgery in Indiana (2024, 373 clinicians with data). Median for this group: $17,012. Middle half: $8,969 to $31,808.
Too few clinicians listed under Surgery in Terre Haute have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Fewer Part D prescriptions than 65% of clinicians listed under Surgery in Indiana (2024, 349 clinicians with data). Median for this group: 68. Middle half: 35 to 122.
Too few clinicians listed under Surgery in Terre Haute have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 75% of clinicians listed under Surgery in Indiana (2024, 349 clinicians with data). Median for this group: $441. Middle half: $130 to $1,955.
Too few clinicians listed under Surgery in Terre Haute have Medicare Part D data for 2024 to compare.
14 active clinicians are listed under Surgery with a practice address in Terre Haute, IN (614 in Indiana).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Terre Haute
7.1% of these 14 clinicians have the CMS telehealth indicator.
64.3% of these 14 clinicians are listed by CMS as accepting Medicare assignment.
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
CMS data for Medicare Part B services are available for 2024 only.
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Medicare-allowed amount
CMS data for Medicare-allowed amount are available for 2024 only.
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Paid by Medicare
CMS data for Medicare payment amount are available for 2024 only.
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 39 in 2020 and 40 in 2024.
- 2020: 39
- 2021: 49
- 2022: 57
- 2023: 11
- 2024: 40
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30-day fills
30-day fills varied from year to year: 39 in 2020 and 40 in 2024.
- 2020: 39
- 2021: 53
- 2022: 57
- 2023: 11
- 2024: 40
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Part D drug cost
Part D drug cost went from $110 in 2020 to $2,180 in 2024.
- 2020: $110
- 2021: $250
- 2022: $176
- 2023: $18
- 2024: $2,180
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $228.35 in 2023 to $1,043.14 in 2025.
- 2023: $228.35
- 2024: $484.17
- 2025: $1,043.14
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): fewer than 11 records totaling $1,043.14.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Medtronic, Inc. |
Education
In-kind items and services
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ENDURANT IIS | General | $435.00 |
| W. L. Gore & Associates, Inc. |
Food and Beverage
In-kind items and services
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VIABAHN Endoprosthesis with PROPATEN Bioactive Surface | General | $124.92 |
| Shockwave Medical, Inc |
Food and Beverage
In-kind items and services
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Shockwave IVL System with the Shockwave C2 Coronary IVL Catheter | General | $107.45 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
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CLOTTRIEVER BOLD CATHETER | General | $100.00 |
| W. L. Gore & Associates, Inc. |
Food and Beverage
In-kind items and services
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GORE VIABAHN Endoprosthesis with Heparin | General | $92.49 |
| W. L. Gore & Associates, Inc. |
Food and Beverage
In-kind items and services
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GORE VIABAHN VBX Balloon Expandable Endo | General | $82.54 |
| Imperative Care, Inc |
Food and Beverage
In-kind items and services
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SYMPHONY CATHETER | General | $33.24 |
| Penumbra, Inc. |
Food and Beverage
Cash or cash equivalent
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Indigo System | General | $28.13 |
| Solventum Corporation |
Food and Beverage
Cash or cash equivalent
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ACTIV.A.C. | General | $20.44 |
| Cook Medical LLC |
Food and Beverage
Cash or cash equivalent
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ZENITH | General | $18.93 |
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 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, 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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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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89 | 89 | $315.00 | $103.01 |
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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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54 | 42 | $210.00 | $73.01 |
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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
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47 | 38 | $250.00 | $84.34 |
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99221
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes
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43 | 42 | $280.00 | $75.88 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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30 | 30 | $470.00 | $155.05 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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28 | 27 | $160.00 | $51.57 |
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45385
Removal of polyps or growths of large bowel using an endoscope with mechanical snare
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19 | 19 | $1314.00 | $229.73 |
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G0121
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk
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15 | 15 | $978.00 | $160.85 |
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43239
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope
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14 | 14 | $1098.00 | $87.30 |
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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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13 | 13 | $360.00 | $119.22 |
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45380
Biopsy of large bowel using a flexible endoscope
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12 | 12 | $1260.00 | $90.47 |
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99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
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12 | 12 | $380.00 | $120.53 |
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 |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 27 | 70 | $55.79 | 25 |
| Sutab | Sod Sulf/Pot Chloride/Mag Sulf | 13 | 19 | $2,124.31 | 13 |
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: 2024-06-18NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Surgery
Doctor of Medicine (M.D.)
Surgery
Doctor of Medicine (M.D.)
Surgery
Doctor of Medicine (M.D.)
Surgery
Doctor of Medicine (M.D.)
Surgery
Doctor of Medicine (M.D.)
Surgery
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1818 N 6TH ST, TERRE HAUTE, IN 478044021 (Tel: 8122321123)
Registered at 1818 N 6TH ST, TERRE HAUTE, IN 478044021 (Tel: 8122321123)
Surgery (license number reported to NPPES: IN 02007735A)
NPI status registered as active in NPPES database
Registered at 11800 E 12 MILE RD, WARREN, MI 480933472 (Tel: 5865735000)
Registered at 11800 E 12 MILE RD, WARREN, MI 480933472
Recorded as TIMOTHY DIAZ, DO
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery Specialists in Terre Haute
- Dr. Custodio Lim, MD
- Dr. Janie Orrington-Myers, DO
- Dr. Vincent Puccia, MD
- Dr. Rebecca Lynch, MD
- Dr. Alan Reyes Cruz, MD
- Dr. Christopher Lueking, MD
Mailing Address
1818 N 6th St
Terre Haute, IN 478044021
Phone: 8122321123