Dr. Mark Gerard Macgregor , MD
Internal Medicine β’ Webster, TX
1010 S Ponds Dr
Webster, TX 775981409
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 Macgregor is listed in NPPES under Internal Medicine.
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NPI assigned on October 6, 2006; this date does not establish years in practice.
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Published CMS data list 12 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Jardiance (Empagliflozin) β 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β 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 Β· Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 95% of clinicians listed under Internal Medicine in Webster, TX (2024, 62 clinicians with data). Median for this group: 736. Middle half: 221 to 3,531.
Fewer 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.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 16,776 in 2020 to 12 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2020β2024.
Practice Location & Contact Primary Location
1010 S Ponds Dr
Webster, TX 775981409
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: Kelsey-Seybold Medical Group, Pllc. 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 Texas Medical Branch At Galveston
1986
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
14 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
$6,659 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 β by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $23.88 in 2024
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2024.
Years since graduation
40 years (graduated 1986)
CMS Doctors and Clinicians data list 1986 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, βDoes your provider accept Medicare as full payment?β
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. Macgregor 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. Macgregor 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 Webster and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 95% of clinicians listed under Internal Medicine in Webster, TX (2024, 62 clinicians with data). Median for this group: 736. Middle half: 221 to 3,531.
Fewer 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.
Part D drug cost
A lower Part D drug cost than 80% of clinicians listed under Internal Medicine in Webster, TX (2024, 62 clinicians with data). Median for this group: $48,008. Middle half: $9,404 to $381,447.
A lower Part D drug cost than 70% 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.
69 active clinicians are listed under Internal Medicine with a practice address in Webster, TX (9,191 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Webster
20.3% of these 69 clinicians have the CMS telehealth indicator.
84.1% of these 69 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 D prescriptions
Medicare Part D prescriptions decreased 100% from 16,776 in 2020 to 12 in 2024.
- 2020: 16,776
- 2021: 6,726
- 2022: 114
- 2023: 70
- 2024: 12
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30-day fills
30-day fills decreased 100% from 35,830 in 2020 to 14 in 2024.
- 2020: 35,830
- 2021: 15,694
- 2022: 240
- 2023: 125
- 2024: 14
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Part D drug cost
Part D drug cost decreased 99% from $799,192 in 2020 to $6,659 in 2024.
- 2020: $799,192
- 2021: $324,219
- 2022: $1,276
- 2023: $1,098
- 2024: $6,659
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $31.68 in 2022 to $23.88 in 2024.
- 2022: $31.68
- 2023: $15.39
- 2024: $23.88
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· 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 2024 (payments made January 1 β December 31, 2024): fewer than 11 records totaling $23.88.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Gilead Sciences, Inc. |
Food and Beverage
In-kind items and services
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β | General | $23.88 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
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 |
|---|---|---|---|---|---|
| Jardiance | Empagliflozin | 12 | 420 | $6,658.64 | β |
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: 2021-06-11NUCC 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
I20040616000839
TX
9133103161
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
Kelsey-Seybold Medical Group, Pllc
2727 W Holcombe Blvd, Houston, TX 770251669
Phone: 7134420000
Kelsey-Seybold Medical Group, Pllc
1010 S Ponds Dr, Webster, TX 775981409
Phone: 7134424300
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Family Medicine
Doctor of Medicine (M.D.)
Family Medicine - Sports Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine - Pulmonary Disease
MB, Bachelor of Science, Doctor of Medicine (M.D.)
Obstetrics & Gynecology
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
NPI status registered as active in NPPES database
Registered at 1010 S PONDS DR, WEBSTER, TX 775981409 (Tel: 7134424500)
Registered at 11511 SHADOW CREEK PKWY, PEARLAND, TX 775847298 (Tel: 7134420000)
Recorded as MARK MACGREGOR, MD
Internal Medicine (license number reported to NPPES: TX H2552)
NPI status registered as active in NPPES database
Registered at 1010 S PONDS DR, WEBSTER, TX 775981409 (Tel: 7134424500)
Registered at 11511 SHADOW CREEK PKWY, PEARLAND, TX 775847298 (Tel: 7134420000)
Recorded as MARK MACGREGOR, MD
Internal Medicine (license number reported to NPPES: TX H2552)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Webster
- Dr. Muralidhar Yerramadha, MD
- Dr. Sailaja Vallabhajosula, MD
- Dr. Remy Teqwimuah, DO
- Dr. Dennis Tang, MD
- Dr. Pranav Bhakta, MD
- Dr. Jamil Memon, MD
Mailing Address
11511 Shadow Creek Pkwy
Pearland, TX 775847298
Phone: 7134420000