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Dr. Mark Gerard Macgregor , MD

Internal Medicine β€’ Webster, TX

Active NPI 1205923851 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

1010 S Ponds Dr
Webster, TX 775981409

Call 7134424500 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

1010 S Ponds Dr

Webster, TX 775981409

Telephone 7134424500
Organization at the Same NPPES Address or Phone
Kelsey-Seybold Medical Group, Pllc Facility NPI 1013915255

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

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

Medical School

University Of Texas Medical Branch At Galveston

Graduation Year

1986

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.

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.

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.

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.

Guide: How to read an Open Payments record

Years since graduation

40 years (graduated 1986)

CMS Doctors and Clinicians data list 1986 as the year this clinician finished professional 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.

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, β€œDoes your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

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.

Guide: How Medicare covers telehealth

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.

Guide: What Medicare enrollment (PECOS) means

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.

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.

Guide: What ordering and referring status means

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.

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

Open Payments Β· Program Year 2024
Disclosure Year:

Program year 2024 (payments made January 1 – 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
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.

CMS Part D Β· Data Year 2024
Prescription Year:
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: 2021-06-11
Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

License # reported to NPPES TX H2552

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.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Texas Medical Board.
Look Up on State Board Site

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid ID
104746606 (TX)
Medicaid ID
104746605 (TX)
Medicaid ID
104746607 (TX)

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - INTERNAL MEDICINE

Medicare Enrollment ID

I20040616000839

Enrollment State Jurisdiction

TX

PECOS Control ID

9133103161

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

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.

29 listed
Dr. Dennis Brown , MD

Family Medicine

NPI 1063447928

Doctor of Medicine (M.D.)

Dr. Horace Brown , MD

Family Medicine - Sports Medicine

NPI 1972065126

Doctor of Medicine (M.D.)

NPI 1932762507

Doctor of Medicine (M.D.)

Dr. Farooq Cheema , MB, BS, MD

Internal Medicine - Pulmonary Disease

NPI 1730336868

MB, Bachelor of Science, Doctor of Medicine (M.D.)

Dr. Alecia Davis , MD

Obstetrics & Gynecology

NPI 1740376029

Doctor of Medicine (M.D.)

NPI 1013650563

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

11 Historical Events
βœ…
NPI Profile Active January 11, 2017

NPI status registered as active in NPPES database

πŸ“
Updated Practice Location January 11, 2017

Registered at 1010 S PONDS DR, WEBSTER, TX 775981409 (Tel: 7134424500)

πŸ“
Updated Business Mailing Address January 11, 2017

Registered at 11511 SHADOW CREEK PKWY, PEARLAND, TX 775847298 (Tel: 7134420000)

πŸ‘€
Provider Name / Credentials Updated January 11, 2017

Recorded as MARK MACGREGOR, MD

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) January 11, 2017

Internal Medicine (license number reported to NPPES: TX H2552)

βœ…
NPI Profile Active October 24, 2014

NPI status registered as active in NPPES database

πŸ“
Practice Location (Initial Record) October 24, 2014

Registered at 1010 S PONDS DR, WEBSTER, TX 775981409 (Tel: 7134424500)

πŸ“
Business Mailing Address (Initial Record) October 24, 2014

Registered at 11511 SHADOW CREEK PKWY, PEARLAND, TX 775847298 (Tel: 7134420000)

πŸ‘€
Provider Name / Credentials (Initial Record) October 24, 2014

Recorded as MARK MACGREGOR, MD

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) October 24, 2014

Internal Medicine (license number reported to NPPES: TX H2552)

🟒
Initial NPI Registration & Enumeration October 06, 2006

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1205923851
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: October 06, 2006
Last Update: June 11, 2021
Sole Proprietor: No

Other Internal Medicine Providers in Webster

All Internal Medicine Providers in Webster

Mailing Address

11511 Shadow Creek Pkwy

Pearland, TX 775847298

Phone: 7134420000

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.