Dr. Mark Shell , DO
Internal Medicine - Gastroenterology โข Temple, TX
1605 S 31st St
Temple, TX 765080001
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. Mark Shell is listed in NPPES under Internal Medicine - Gastroenterology.
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NPI assigned on May 7, 2019; this date does not establish years in practice.
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Published CMS data list 32 Original Medicare Part B services in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Published rows only; this is not a quality measure.
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Published Part B service records, 2023:
- 99213 โ Established patient outpatient office visit: 32 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2022 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2023). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 164 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Omeprazole โ 43 prescription fills, including refills.
- Pantoprazole Sodium โ 35 prescription fills, including refills.
- Promethazine Hcl โ 22 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 7 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Close to the middle for Part D prescriptions among clinicians listed under Internal Medicine - Gastroenterology in Temple, TX (2024, 17 clinicians with data). Median for this group: 170. Middle half: 130 to 262.
Fewer Part D prescriptions than 75% of clinicians listed under Internal Medicine - Gastroenterology in Texas (2024, 1,099 clinicians with data). Median for this group: 605. Middle half: 194 to 1,148.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 114 in 2022 to 32 in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022โ2023.
Practice Location & Contact Primary Location
1605 S 31st St
Temple, TX 765080001
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Temple, TX. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Scott And White Clinic. 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
2019
What Public CMS Data Show
Internal Medicine - Gastroenterology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $2,031 in 2023
The total amount Medicare approved for these services in 2023. 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 โ by Provider and Service, 2023.
Paid by Medicare
About $1,336 in 2023
The part of the Medicare-allowed amount that Medicare itself paid in 2023, 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 โ by Provider and Service, 2023.
30-day fills
276 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
$8,050 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 โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $2,390.14 across 19 records.
By nature of payment
- Travel and Lodging: $1,479.36 across 6 records.
- Food and Beverage: $910.78 across 13 records.
Reporting-company totals (3 largest of 7)
- Boston Scientific Corporation: $2,142.45 across 13 records.
- Pfizer Inc.: $108.35 across 1 record.
- Madrigal Pharmaceuticals: $45.29 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.
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, โDoes your provider accept Medicare as full payment?โ
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. Shell 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. Shell 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 Temple and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Internal Medicine - Gastroenterology in Temple, TX (2024, 17 clinicians with data). Median for this group: 170. Middle half: 130 to 262.
Fewer Part D prescriptions than 75% of clinicians listed under Internal Medicine - Gastroenterology in Texas (2024, 1,099 clinicians with data). Median for this group: 605. Middle half: 194 to 1,148.
Part D drug cost
A lower Part D drug cost than 80% of clinicians listed under Internal Medicine - Gastroenterology in Temple, TX (2024, 17 clinicians with data). Median for this group: $24,183. Middle half: $15,098 to $275,270.
A lower Part D drug cost than 80% of clinicians listed under Internal Medicine - Gastroenterology in Texas (2024, 1,099 clinicians with data). Median for this group: $88,602. Middle half: $16,242 to $268,690.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Shell are from 2023.
27 active clinicians are listed under Internal Medicine - Gastroenterology with a practice address in Temple, TX (1,478 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Temple
18.5% of these 27 clinicians have the CMS telehealth indicator.
70.4% of these 27 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
Medicare Part B services decreased 72% from 114 in 2022 to 32 in 2023.
- 2022: 114
- 2023: 32
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Medicare-allowed amount
Medicare-allowed amount decreased 72% from $7,364 in 2022 to $2,031 in 2023.
- 2022: $7,364
- 2023: $2,031
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Paid by Medicare
Paid by Medicare decreased 75% from $5,438 in 2022 to $1,336 in 2023.
- 2022: $5,438
- 2023: $1,336
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 12 in 2021 to 164 in 2024.
- 2021: 12
- 2022: 287
- 2023: 137
- 2024: 164
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30-day fills
30-day fills went from 17 in 2021 to 276 in 2024.
- 2021: 17
- 2022: 441
- 2023: 195
- 2024: 276
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Part D drug cost
Part D drug cost went from $175 in 2021 to $8,050 in 2024.
- 2021: $175
- 2022: $10,930
- 2023: $1,634
- 2024: $8,050
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $170.74 in 2022 to $2,390.14 in 2025.
- 2022: $170.74
- 2023: $121.72
- 2024: $1,523.06
- 2025: $2,390.14
Sources: CMS Medicare Physician & Other Practitioners (2023), 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 ยท 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 โ December 31, 2025): 19 records totaling $2,390.14.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Boston Scientific Corporation |
Travel and Lodging
In-kind items and services
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OverStitch Endoscopic Suturing System | General | $457.85 |
| Boston Scientific Corporation |
Travel and Lodging
In-kind items and services
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OverStitch Endoscopic Suturing System | General | $259.64 |
| Boston Scientific Corporation |
Travel and Lodging
In-kind items and services
|
OverStitch Endoscopic Suturing System | General | $259.64 |
| Boston Scientific Corporation |
Travel and Lodging
In-kind items and services
|
OverStitch Endoscopic Suturing System | General | $259.64 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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OverStitch Endoscopic Suturing System | General | $199.71 |
| Boston Scientific Corporation |
Travel and Lodging
Cash or cash equivalent
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General - Therapies | General | $190.37 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
|
OverStitch Endoscopic Suturing System | General | $187.98 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
|
OverStitch Endoscopic Suturing System | General | $152.15 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
VELSIPITY | General | $108.35 |
| Boston Scientific Corporation |
Food and Beverage
Cash or cash equivalent
|
General - Therapies | General | $81.67 |
| Boston Scientific Corporation |
Travel and Lodging
In-kind items and services
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OverStitch Endoscopic Suturing System | General | $52.22 |
| Madrigal Pharmaceuticals |
Food and Beverage
In-kind items and services
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REZDIFFRA | General | $45.29 |
| Aimmune Therapeutics, Inc. |
Food and Beverage
In-kind items and services
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ZENPEP | General | $29.03 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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TREMFYA | General | $23.92 |
| Enterra Medical, Inc. |
Food and Beverage
In-kind items and services
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โ | General | $20.56 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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PILLCAM | General | $20.54 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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CAPTIVATOR II | General | $16.59 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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TRUEtome 49 | General | $13.64 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
|
EXALT Model D | General | $11.35 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2021โ2022 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 โ by Provider and Service data, 2022โ2023; 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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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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32 | 31 | $142.00 | $63.48 |
Source: CMS Part B by Provider and Service, 2023; 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 |
|---|---|---|---|---|---|
| Omeprazole | Omeprazole | 43 | 2,578 | $916.39 | 16 |
| Pantoprazole Sodium | Pantoprazole Sodium | 35 | 2,370 | $1,257.99 | 12 |
| Promethazine Hcl | Promethazine Hcl | 22 | 624 | $496.74 | โ |
| Mesalamine | Mesalamine | 21 | 630 | $4,395.16 | โ |
| Mirtazapine | Mirtazapine | 16 | 480 | $139.03 | โ |
| Azathioprine | Azathioprine | 15 | 740 | $665.79 | โ |
| Famotidine | Famotidine | 12 | 780 | $178.78 | โ |
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: 2025-06-20NUCC Taxonomy Code: 207RG0100X
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GASTROENTEROLOGY
I20210812000668
TX
2668706607
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
Scott And White Clinic
900 Scott And White Dr, College Station, TX 778456419
Phone: 9792077400
Scott And White Clinic
2401 S 31st St Bldg, Temple, TX 765080001
Phone: 2547242663
Scott And White Clinic
1280 Arrington Rd, College Station, TX 778458696
Phone: 9792076550
Scott And White Clinic
1700 University Dr E Entrance 16, College Station, TX 778402661
Phone: 9792073636
Scott And White Clinic
2401 S 31st St, Temple, TX 765080001
Phone: 2547242459
Scott And White Clinic
700 Scott And White Dr, College Station, TX 778456441
Phone: 9792070100
Scott And White Clinic
1700 University Dr E, College Station, TX 778402661
Phone: 9796913300
Scott And White Clinic
810 W U Ave, Temple, TX 765080001
Phone: 2547242585
Scott And White Clinic
1605 S 31st St, Temple, TX 765080001
Phone: 2542150100
Secondary Practice Locations
2401 S 31st St
Temple, TX 765080001
Phone: 2542150600
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Doctor of Osteopathic Medicine (D.O.)
Internal Medicine
Doctor of Osteopathic Medicine (D.O.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Internal Medicine
Internal Medicine - Endocrinology, Diabetes & Metabolism
MB, Bachelor of Science
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at PO BOX 844658, DALLAS, TX 752844658 (Tel: 2547242111)
Internal Medicine (license number reported to NPPES: TX T1845)
Registered at 1605 S 31ST ST, TEMPLE, TX 765080001 (Tel: 2542150100)
NPI status registered as active in NPPES database
Registered at 2401 S 31ST ST, TEMPLE, TX 765080001 (Tel: 2542150600)
Registered at 3451 RIVER PARK DR APT 922, FORT WORTH, TX 761169579 (Tel: 2544988987)
Recorded as MARK SHELL, DO
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine - Gastroenterology Specialists in Temple
- Dr. Raymond Duggan, DO
- Dr. Christopher Naumann, MD
- Namisha Thapa
- Juan Diocares
- Alexis Bejcek
- Dr. Gurkarminder Sandhu, MD
Mailing Address
Po Box 844658
Dallas, TX 752844658
Phone: 2547242111