Callum Graham McCormick, M.S., D.O.
Internal Medicine Physician · Irving, TX
Callum Graham McCormick, M.S., D.O. is an internal medicine physician with a practice address in Irving, Texas, and NPI 1831551589, issued on Mar 22, 2016. Check the license (Texas S2413, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Callum Graham McCormick
- Credential
- M.S., D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- S2413 TX
Self-reported in NPPES; status is on the state search - Practice location
- 6161 N State Highway 161 Ste 200, Irving, TX 75038
- Phone
- (972) 258-7499
- Enumerated
- Mar 22, 2016
- Record last updated
- Oct 3, 2024
- Fax
- (972) 870-7303
- Medicare enrollment
- Enrolled (PECOS I20190916002520); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 6161 N State Highway 161 Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alyssa Brion, PA-CPhysician Assistant1356943013
- Atiq Budhani, DOFamily Medicine Physician1336560101
- Tania Castleman, FNP-BCFamily Nurse Practitioner1124629639
- John Martin, MDFamily Medicine Physician1881645646
- Chizoba OnyemelukwePhysician Assistant1275210189
- Delara Pollman, APRN-CNPFamily Nurse Practitioner1962766303
Verify Callum Graham McCormick in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license S2413Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% more Medicare Part D claims than the average internal medicine physician in 2024
5,435 Medicare Part D claims for 661 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Atorvastatin Calcium278 claims
- Amlodipine Besylate237 claims
- Fluticasone Propionate232 claims
- Levothyroxine Sodium194 claims
- Rosuvastatin Calcium194 claims
- Metformin Hcl156 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Medical Clinic OF North Texas, PLLCIrving, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Callum Graham McCormick among 9,175 internal medicine physician records in Texas
Callum Graham McCormick, M.S., D.O. is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 74% of them.
- NPI issued2016 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2016 · median 2004 among the 6,088 with a school on file
- Record last updated2024 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
98 internal medicine physician records list a practice address in Irving
They are 98 of the 3,532 NPPES records with a practice address in Irving, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Irving → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Engleman, MDIrving, TX 750381427095603
- John Gillean, MDIrving, TX 750381699822635
- Betty Grasty, MDIrving, TX 750381407853674
- Suma Gudur, M.DIrving, TX 750381043461585
- Sofia Gul, MDIrving, TX 750381346573086
- Shanisa Harrold, MDIrving, TX 750381831651504
- Franklin Heredia, MDIrving, TX 750381295719870
- Sumana Ketha, MDIrving, TX 750381962447805
Common questions
What is Callum Graham McCormick, M.S., D.O.'s NPI number?
Callum Graham McCormick, M.S., D.O.'s National Provider Identifier (NPI) is 1831551589, issued on Mar 22, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Callum Graham McCormick, M.S., D.O. located?
The NPPES record lists a practice address at 6161 N State Highway 161 Ste 200, Irving, TX, 75038. Phone: (972) 258-7499. Providers update this record themselves, so call before visiting.
How can I verify Callum Graham McCormick, M.S., D.O.'s license?
NPPES lists Texas license number S2413, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Callum Graham McCormick, M.S., D.O. prescribe under Medicare Part D?
In 2024, Callum Graham McCormick, M.S., D.O. had 5,435 Medicare Part D claims for 661 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.