Dr. Mark W Sij , DO
Internal Medicine • Kaufman, TX
874 Ed Hall Dr Ste B-108
Kaufman, TX 751421861
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 March 27, 2006; this date does not establish years in practice.
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Published CMS data list 6,702 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:
- J1010 — Injection, methylprednisolone acetate, 1 mg: 3,770 service units.
- 93010 — Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only: 1,217 service units.
- 99214 — Established patient outpatient office visit: 572 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 16 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 23,353 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:
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) — 801 prescription fills, including refills.
- Atorvastatin Calcium — 751 prescription fills, including refills.
- Pantoprazole Sodium — 684 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 240 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: 645. Middle half: 277 to 1,322.
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 3,097 in 2020 to 6,702 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
874 Ed Hall Dr Ste B-108
Kaufman, TX 751421861
CMS Doctors and Clinicians lists 1 group name: Texas Health Physicians Group. 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
University Of North Texas Hsc, College Of Osteopathic Med
1998
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
990 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 $112,442 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 $76,988 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
43,597 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
$1,525,595 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: $2,353.74 across 120 records.
By nature of payment
- Food and Beverage: $2,353.74 across 120 records.
Reporting-company totals (3 largest of 26)
- ABBVIE INC.: $415.98 across 28 records.
- AstraZeneca Pharmaceuticals LP: $238.81 across 12 records.
- Pfizer Inc.: $237.23 across 10 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
28 years (graduated 1998)
CMS Doctors and Clinicians data list 1998 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
2006
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?”
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Sij 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. Sij 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 Kaufman and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: 645. Middle half: 277 to 1,322.
Too few clinicians listed under Internal Medicine in Kaufman have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 70% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: $61,221. Middle half: $27,420 to $115,826.
Too few clinicians listed under Internal Medicine in Kaufman have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 65% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: $47,501. Middle half: $20,446 to $90,051.
Too few clinicians listed under Internal Medicine in Kaufman have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 95% of clinicians listed under Internal Medicine in Texas (2024, 5,674 clinicians with data). Median for this group: 828. Middle half: 121 to 4,824.
Too few clinicians listed under Internal Medicine in Kaufman have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 95% of clinicians listed under Internal Medicine in Texas (2024, 5,674 clinicians with data). Median for this group: $64,859. Middle half: $4,211 to $436,775.
Too few clinicians listed under Internal Medicine in Kaufman have Medicare Part D data for 2024 to compare.
9 active clinicians are listed under Internal Medicine with a practice address in Kaufman, TX (9,191 in Texas).
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 increased 116% from 3,097 in 2020 to 6,702 in 2024.
- 2020: 3,097
- 2021: 2,739
- 2022: 3,024
- 2023: 2,476
- 2024: 6,702
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Medicare-allowed amount
Medicare-allowed amount decreased 14% from $131,041 in 2020 to $112,442 in 2024.
- 2020: $131,041
- 2021: $137,666
- 2022: $122,507
- 2023: $111,352
- 2024: $112,442
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Paid by Medicare
Paid by Medicare decreased 15% from $90,124 in 2020 to $76,988 in 2024.
- 2020: $90,124
- 2021: $94,881
- 2022: $82,850
- 2023: $74,996
- 2024: $76,988
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 15% from 20,299 in 2020 to 23,353 in 2024.
- 2020: 20,299
- 2021: 19,707
- 2022: 18,969
- 2023: 19,711
- 2024: 23,353
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30-day fills
30-day fills increased 21% from 36,112 in 2020 to 43,597 in 2024.
- 2020: 36,112
- 2021: 36,071
- 2022: 35,667
- 2023: 37,055
- 2024: 43,597
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Part D drug cost
Part D drug cost increased 38% from $1,106,393 in 2020 to $1,525,595 in 2024.
- 2020: $1,106,393
- 2021: $1,022,313
- 2022: $879,960
- 2023: $1,206,295
- 2024: $1,525,595
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Industry payments (Open Payments)
Industry payments (Open Payments) increased 95% from $1,206.47 in 2021 to $2,353.74 in 2025.
- 2021: $1,206.47
- 2022: $1,535.65
- 2023: $1,866.85
- 2024: $2,065.39
- 2025: $2,353.74
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): 120 records totaling $2,353.74.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Corcept Therapeutics |
Food and Beverage
In-kind items and services
|
Korlym | General | $42.81 |
| Corcept Therapeutics |
Food and Beverage
In-kind items and services
|
Korlym | General | $42.81 |
| Corcept Therapeutics |
Food and Beverage
In-kind items and services
|
Korlym | General | $42.81 |
| Corcept Therapeutics |
Food and Beverage
In-kind items and services
|
Korlym | General | $40.77 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
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TZIELD | General | $36.25 |
| Eisai Inc. |
Food and Beverage
In-kind items and services
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Leqembi | General | $32.50 |
| Axsome Therapeutics, Inc. |
Food and Beverage
In-kind items and services
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Auvelity | General | $31.70 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
JARDIANCE | General | $29.47 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
|
TZIELD | General | $29.40 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
VYNDAQEL | General | $27.88 |
| ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) |
Food and Beverage
In-kind items and services
|
CAPLYTA | General | $27.58 |
| Otsuka America Pharmaceutical, Inc. |
Food and Beverage
In-kind items and services
|
REXULTI | General | $27.36 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
ELIQUIS | General | $26.67 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
AIRSUPRA | General | $26.66 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
AIRSUPRA | General | $26.19 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
VYNDAQEL | General | $26.08 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
|
JARDIANCE | General | $26.00 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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FARXIGA | General | $25.68 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
PREVNAR 20 | General | $25.07 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
CREON | General | $24.89 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Wegovy | General | $24.75 |
| Corcept Therapeutics |
Food and Beverage
In-kind items and services
|
Korlym | General | $24.46 |
| Abbott Laboratories |
Food and Beverage
In-kind items and services
|
FREESTYLE LIBRE 3 | General | $24.02 |
| Takeda Pharmaceuticals U.S.A., Inc. |
Food and Beverage
In-kind items and services
|
TRINTELLIX | General | $23.84 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
ELIQUIS | General | $23.65 |
(top 25 shown)
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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J1010
Injection, methylprednisolone acetate, 1 mg
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3,770 | 38 | $0.31 | $0.13 |
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93010
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
|
1,217 | 775 | $28.00 | $7.69 |
|
99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
572 | 241 | $323.00 | $121.73 |
|
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
|
494 | 231 | $18.00 | $15.62 |
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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
|
162 | 40 | $128.00 | $39.76 |
|
G0008
Administration of influenza virus vaccine
|
87 | 83 | $60.00 | $31.03 |
|
90662
Influenza vaccine split virus, preservative free
|
84 | 80 | $93.71 | $81.11 |
|
J0696
Injection, ceftriaxone sodium, per 250 mg
|
68 | 17 | $3.00 | $0.46 |
|
96372
Injection of drug or substance under skin or into muscle
|
60 | 38 | $73.00 | $13.61 |
|
20610
Aspiration and/or injection of fluid from large joint
|
43 | 28 | $247.63 | $59.03 |
|
81003
Automated urinalysis test
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39 | 31 | $10.00 | $2.20 |
|
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
|
29 | 27 | $167.00 | $49.96 |
|
80305
Testing for presence of drug, read by direct observation
|
23 | 19 | $38.00 | $12.35 |
|
J1040
Injection, methylprednisolone acetate, 80 mg
|
22 | 21 | $21.55 | $9.72 |
|
99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
17 | 17 | $500.00 | $151.43 |
|
99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
15 | 14 | $218.00 | $86.71 |
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 |
|---|---|---|---|---|---|
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 801 | 21,846 | $31,617.73 | 135 |
| Atorvastatin Calcium | Atorvastatin Calcium | 751 | 57,042 | $5,110.22 | 198 |
| Pantoprazole Sodium | Pantoprazole Sodium | 684 | 46,153 | $5,053.69 | 175 |
| Levothyroxine Sodium | Levothyroxine Sodium | 670 | 50,179 | $5,694.25 | 190 |
| Gabapentin | Gabapentin | 641 | 30,010 | $9,314.74 | 149 |
| Amlodipine Besylate | Amlodipine Besylate | 558 | 42,177 | $2,905.75 | 160 |
| Meloxicam | Meloxicam | 519 | 41,153 | $2,913.45 | 169 |
| Lisinopril | Lisinopril | 513 | 36,275 | $2,815.24 | 136 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 469 | 32,460 | $3,494.75 | 125 |
| Trazodone Hcl | Trazodone Hcl | 460 | 22,663 | $2,420.12 | 103 |
| Furosemide | Furosemide | 454 | 27,809 | $1,741.78 | 124 |
| Metformin Hcl | Metformin Hcl | 440 | 30,505 | $2,800.46 | 119 |
| Losartan Potassium | Losartan Potassium | 377 | 29,190 | $3,213.44 | 114 |
| Tamsulosin Hcl | Tamsulosin Hcl | 366 | 24,790 | $4,199.92 | 97 |
| Alprazolam | Alprazolam | 350 | 11,496 | $1,825.43 | 55 |
| Clonazepam | Clonazepam | 329 | 11,034 | $2,819.20 | 72 |
| Escitalopram Oxalate | Escitalopram Oxalate | 306 | 17,607 | $2,431.78 | 77 |
| Pregabalin | Pregabalin | 290 | 10,666 | $4,469.88 | 50 |
| Diclofenac Sodium | Diclofenac Sodium | 285 | 12,523 | $4,150.67 | 63 |
| Potassium Chloride | Potassium Chloride | 285 | 15,949 | $3,857.71 | 66 |
| Tizanidine Hcl | Tizanidine Hcl | 277 | 12,073 | $3,709.93 | 86 |
| Tramadol Hcl | Tramadol Hcl | 274 | 7,422 | $2,971.49 | 60 |
| Clopidogrel | Clopidogrel Bisulfate | 269 | 17,686 | $2,008.12 | 68 |
| Methylprednisolone | Methylprednisolone | 268 | 1,638 | $2,049.49 | 184 |
| Omeprazole | Omeprazole | 264 | 20,209 | $4,190.20 | 71 |
(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
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
I20090325000516
TX
8426115056
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
Texas Health Physicians Group
874 Ed Hall Dr, Kaufman, TX 751421861
Phone: 9729325555
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Nurse Practitioner
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Internal Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Advanced Practice Registered Nurse, Family Nurse Practitioner (Board Certified)
Career & Practice History
NPI enumerated March 27, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Internal Medicine Providers in Kaufman
Mailing Address
874 Ed Hall Dr Ste B-108
Kaufman, TX 751421861
Phone: 9729325555