Dr. Samuel Peter Mackoff , MD
General Practice โข Houston, TX
6411 Fannin St
Houston, TX 770301501
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. Samuel Mackoff is listed in NPPES under General Practice.
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NPI assigned on April 8, 2021; this date does not establish years in practice.
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Published CMS data list 56 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99233 โ Subsequent hospital care with moderate levelof medical decision making: 56 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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Fewer Medicare Part B services than 80% of clinicians listed under General Practice in Houston, TX (2024, 28 clinicians with data). Median for this group: 223. Middle half: 73 to 747.
Fewer Medicare Part B services than 80% of clinicians listed under General Practice in Texas (2024, 172 clinicians with data). Median for this group: 341. Middle half: 100 to 1,551.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
Practice Location & Contact Primary Location
6411 Fannin St
Houston, TX 770301501
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
24 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 โ by Provider, 2024.
Medicare-allowed amount
About $6,658 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 โ by Provider and Service, 2024.
Paid by Medicare
About $5,305 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 โ by Provider and Service, 2024.
Open Payments general payments, program year 2025
All general payments: $63.90 across 3 records.
By nature of payment
- Food and Beverage: $63.90 across 3 records.
Reporting-company totals
- GlaxoSmithKline, LLC.: $32.88 across 2 records.
- Merck Sharp & Dohme LLC: $31.02 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).
NPI first issued
2021
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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. Mackoff 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. Mackoff 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 Houston and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 80% of clinicians listed under General Practice in Houston, TX (2024, 28 clinicians with data). Median for this group: 223. Middle half: 73 to 747.
Fewer Medicare Part B services than 80% of clinicians listed under General Practice in Texas (2024, 172 clinicians with data). Median for this group: 341. Middle half: 100 to 1,551.
Medicare-allowed amount
A lower Medicare-allowed amount than 80% of clinicians listed under General Practice in Houston, TX (2024, 28 clinicians with data). Median for this group: $20,660. Middle half: $9,422 to $74,378.
A lower Medicare-allowed amount than 75% of clinicians listed under General Practice in Texas (2024, 172 clinicians with data). Median for this group: $28,596. Middle half: $8,918 to $83,485.
Paid by Medicare
A lower Medicare payment amount than 80% of clinicians listed under General Practice in Houston, TX (2024, 28 clinicians with data). Median for this group: $14,270. Middle half: $6,534 to $56,228.
A lower Medicare payment amount than 75% of clinicians listed under General Practice in Texas (2024, 172 clinicians with data). Median for this group: $19,146. Middle half: $6,451 to $65,134.
133 active clinicians are listed under General Practice with a practice address in Houston, TX (1,066 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Houston
6.8% of these 133 clinicians have the CMS telehealth indicator.
30.1% of these 133 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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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2025 only.
Sources: CMS Medicare Physician & Other Practitioners (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): fewer than 11 records totaling $63.90.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
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ZERBAXA | General | $31.02 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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NUCALA | General | $17.49 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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NUCALA | General | $15.39 |
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 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 โ 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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99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
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56 | 13 | $283.00 | $118.90 |
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.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2024-09-19NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
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 - GENERAL PRACTICE
I20240929000167
TX
4486185683
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
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 Medicine (M.D.)
Student in an Organized Health Care Education/Training Program
Student in an Organized Health Care Education/Training Program
Internal Medicine
Doctor of Medicine (M.D.)
Hospitalist
Doctor of Medicine (M.D.)
Internal Medicine - Cardiovascular Disease
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 6411 FANNIN ST, HOUSTON, TX 770301501 (Tel: 7135006526)
Registered at 1133 JOHN FREEMAN BLVD STE JJLS80, HOUSTON, TX 770302809
Internal Medicine (license number reported to NPPES: TX V2151)
NPI status registered as active in NPPES database
Registered at 6431 FANNIN ST # 1.134, HOUSTON, TX 770301501 (Tel: 7135006526)
Registered at 6431 FANNIN ST # 1.134, HOUSTON, TX 770301501
Recorded as SAMUEL MACKOFF, MD
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other General Practices in Houston
- Dr. Kelechi Azuogu, MD
- Dr. Mabel Perez, MD
- Atia Amatullah
- Dr. Zachary Sanford, MD MSC
- Dr. Katherine Mcelroy, MD
- Dr. Stephen Vanroekel, DO
Mailing Address
1133 John Freeman Blvd Ste Jjls80
Houston, TX 770302809