Dr. Callum Graham Mccormick , MS, DO
Internal Medicine โข Irving, TX
6161 N State Highway 161 Ste 200
Irving, TX 750382220
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. Callum Mccormick is listed in NPPES under Internal Medicine.
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NPI assigned on March 22, 2016; this date does not establish years in practice.
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Published CMS data list 423 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:
- 99214 โ Established patient outpatient office visit: 226 service units.
- 93000 โ Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report: 29 service units.
- G0439 โ Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit: 29 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 all 10 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 4,741 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:
- Atorvastatin Calcium โ 278 prescription fills, including refills.
- Amlodipine Besylate โ 237 prescription fills, including refills.
- Fluticasone Propionate โ 232 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 100 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 60% of clinicians listed under Internal Medicine in Irving, TX (2024, 73 clinicians with data). Median for this group: 611. Middle half: 277 to 1,016.
Fewer Medicare Part B services than 60% 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 โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 108 in 2019 to 423 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2019โ2024.
Practice Location & Contact Primary Location
6161 N State Highway 161 Ste 200
Irving, TX 750382220
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: Medical Clinic Of North Texas, 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
2016
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
133 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 $36,821 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 $25,099 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.
30-day fills
11,348 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
$376,275 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.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $26.93 in 2025
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 2025.
Years since graduation
10 years (graduated 2016)
CMS Doctors and Clinicians data list 2016 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
2016
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
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. Mccormick 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. Mccormick 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 Irving and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 60% of clinicians listed under Internal Medicine in Irving, TX (2024, 73 clinicians with data). Median for this group: 611. Middle half: 277 to 1,016.
Fewer Medicare Part B services than 60% 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.
Medicare-allowed amount
A lower Medicare-allowed amount than 65% of clinicians listed under Internal Medicine in Irving, TX (2024, 73 clinicians with data). Median for this group: $61,380. Middle half: $20,865 to $88,737.
A lower Medicare-allowed amount than 65% 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.
Paid by Medicare
A lower Medicare payment amount than 65% of clinicians listed under Internal Medicine in Irving, TX (2024, 73 clinicians with data). Median for this group: $46,931. Middle half: $15,873 to $70,519.
A lower Medicare payment amount than 70% 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.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Internal Medicine in Irving, TX (2024, 70 clinicians with data). Median for this group: 675. Middle half: 162 to 3,733.
More Part D prescriptions than 70% 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 higher Part D drug cost than 75% of clinicians listed under Internal Medicine in Irving, TX (2024, 70 clinicians with data). Median for this group: $80,468. Middle half: $3,506 to $310,950.
A higher 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.
99 active clinicians are listed under Internal Medicine with a practice address in Irving, TX (9,191 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Irving
26.3% of these 99 clinicians have the CMS telehealth indicator.
70.7% of these 99 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 increased 292% from 108 in 2019 to 423 in 2024.
- 2019: 108
- 2020: 717
- 2021: 176
- 2024: 423
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Medicare-allowed amount
Medicare-allowed amount increased 378% from $7,708 in 2019 to $36,821 in 2024.
- 2019: $7,708
- 2020: $65,632
- 2021: $20,794
- 2024: $36,821
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Paid by Medicare
Paid by Medicare increased 331% from $5,829 in 2019 to $25,099 in 2024.
- 2019: $5,829
- 2020: $47,213
- 2021: $8,815
- 2024: $25,099
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 99% from 2,387 in 2020 to 4,741 in 2024.
- 2020: 2,387
- 2021: 3,901
- 2022: 5,694
- 2023: 6,068
- 2024: 4,741
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30-day fills
30-day fills increased 110% from 5,404 in 2020 to 11,348 in 2024.
- 2020: 5,404
- 2021: 8,952
- 2022: 13,352
- 2023: 14,632
- 2024: 11,348
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Part D drug cost
Part D drug cost increased 357% from $82,419 in 2020 to $376,275 in 2024.
- 2020: $82,419
- 2021: $203,000
- 2022: $453,410
- 2023: $554,737
- 2024: $376,275
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $61.18 in 2019 to $26.93 in 2025.
- 2019: $61.18
- 2020: $47.31
- 2021: $264.52
- 2025: $26.93
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 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 $26.93.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $26.93 |
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 2018โ2023 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, 2019โ2024; 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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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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226 | 106 | $456.57 | $125.88 |
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93000
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
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29 | 27 | $94.03 | $14.02 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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29 | 29 | $426.21 | $127.92 |
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81003
Automated urinalysis test
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26 | 26 | $15.65 | $2.20 |
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G0442
Annual alcohol misuse screening, 5 to 15 minutes
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24 | 24 | $88.00 | $18.65 |
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80053
Blood test, comprehensive group of blood chemicals
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22 | 21 | $29.00 | $10.35 |
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G0444
Annual depression screening, 5 to 15 minutes
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21 | 21 | $88.00 | $18.67 |
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83036
Hemoglobin a1c level
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17 | 17 | $27.00 | $9.52 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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17 | 17 | $741.65 | $165.43 |
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80061
Blood test, lipids (cholesterol and triglycerides)
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12 | 12 | $37.00 | $13.12 |
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 |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 278 | 23,772 | $1,954.49 | 117 |
| Amlodipine Besylate | Amlodipine Besylate | 237 | 20,205 | $1,270.70 | 100 |
| Fluticasone Propionate | Fluticasone Propionate | 232 | 12,893 | $3,117.03 | 130 |
| Levothyroxine Sodium | Levothyroxine Sodium | 194 | 15,457 | $1,596.28 | 70 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 194 | 16,918 | $1,465.20 | 77 |
| Metformin Hcl | Metformin Hcl | 156 | 12,858 | $1,115.92 | 61 |
| Tamsulosin Hcl | Tamsulosin Hcl | 132 | 10,199 | $1,277.34 | 51 |
| Lisinopril | Lisinopril | 129 | 10,611 | $792.93 | 54 |
| Levocetirizine Dihydrochloride | Levocetirizine Dihydrochloride | 127 | 6,201 | $1,205.62 | 54 |
| Gabapentin | Gabapentin | 123 | 6,908 | $1,663.37 | 50 |
| Metoprolol Succinate | Metoprolol Succinate | 114 | 9,740 | $1,001.35 | 46 |
| Simvastatin | Simvastatin | 102 | 8,830 | $672.27 | 44 |
| Pantoprazole Sodium | Pantoprazole Sodium | 101 | 8,550 | $721.94 | 46 |
| Montelukast Sodium | Montelukast Sodium | 94 | 6,364 | $530.86 | 35 |
| Trazodone Hcl | Trazodone Hcl | 91 | 5,960 | $1,370.18 | 29 |
| Losartan Potassium | Losartan Potassium | 88 | 7,850 | $598.28 | 39 |
| Omeprazole | Omeprazole | 84 | 6,215 | $1,330.80 | 38 |
| Carvedilol | Carvedilol | 78 | 6,210 | $486.68 | 30 |
| Duloxetine Hcl | Duloxetine Hcl | 73 | 3,650 | $1,445.29 | 25 |
| Olmesartan Medoxomil | Olmesartan Medoxomil | 72 | 6,210 | $902.99 | 30 |
| Hydrochlorothiazide | Hydrochlorothiazide | 64 | 5,740 | $299.26 | 28 |
| Meloxicam | Meloxicam | 63 | 3,604 | $280.39 | 24 |
| Vitamin D2 | Ergocalciferol (Vitamin D2) | 59 | 2,774 | $511.69 | 18 |
| Ozempic | Semaglutide | 59 | 2,074 | $67,009.65 | 14 |
| Alendronate Sodium | Alendronate Sodium | 58 | 3,825 | $339.76 | 21 |
(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
Self-certified to NPPES: 2024-10-03NUCC 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 - INTERNAL MEDICINE
I20190916002520
TX
9739418831
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
Medical Clinic Of North Texas, Pllc
6161 N State Hwy 161, Irving, TX 750382220
Phone: 9722587499
Medical Clinic Of North Texas, Pllc
900 Airport Fwy, Hurst, TX 760543253
Phone: 8175144000
Medical Clinic Of North Texas, Pllc
7501 Lakeview Pkwy, Rowlett, TX 750889324
Phone: 9724633100
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
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Nurse Practitioner - Family
Family Nurse Practitioner (Board Certified)
General Practice
Physician Assistant (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 6161 N STATE HIGHWAY 161 STE 200, IRVING, TX 750382220 (Tel: 9722587499)
Registered at 6161 N STATE HIGHWAY 161 STE 200, IRVING, TX 750382220 (Tel: 9722587499)
Registered at 400 HOSPITAL DR STE 208, CORSICANA, TX 751102489 (Tel: 9036417860)
Internal Medicine (license number reported to NPPES: TX S2413)
NPI status registered as active in NPPES database
Registered at 506 6TH ST, BROOKLYN, NY 112153609 (Tel: 7187803000)
Registered at 506 6TH ST, BROOKLYN, NY 112153609
Recorded as CALLUM MCCORMICK, M.S., D.O.
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Irving
- Dr. Jeffrey Austin, MD
- Dr. Pritha Browning, MD
- Dr. Harichandana Mukkamalla, MD
- Dr. Jenifer Welsh, MD
- Dr. Richard Johnston, MD
- Dr. Murad Jussa, MD
Mailing Address
6161 N State Highway 161 Ste 200
Irving, TX 750382220
Phone: 9722587499