Dr. Catherine Brittain Callahan, MD
- Medicare services, 2024
- 3,739
- Medicare patients, 2024
- 426
- Part D claims, 2024
- 7,744
- Hospital affiliations
- 2
- Industry payments
- $3,794
- Practice address
- 5960 Fairview Rd, Charlotte, NC 28210
- Practice phone
- Call (704) 495-6334
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Tryon Medical Partners
Charlotte, North Carolina
Find Dr. Callahan's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Catherine Brittain Callahan is an internist in Charlotte, North Carolina
Dr. Callahan practices at Tryon Medical Partners in Charlotte, North Carolina.
Dr. Callahan's NPI, 1407870926, was assigned on July 27, 2006. Dr. Callahan graduated from Medical College of Georgia School of Medicine in 2006. Dr. Callahan holds North Carolina license 200101316.
- NPI
- 1407870926NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618983834
- NPI enumeration date
- July 27, 2006
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (704) 495-6334
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Catherine Brittain Callahan practices at Tryon Medical Partners in Charlotte, North Carolina
Dr. Callahan's primary practice is Tryon Medical Partners, at 5960 Fairview Rd, Charlotte, NC 28210 in Mecklenburg County. The practice phone is (704) 495-6334.
- Tryon Medical Partners5960 Fairview Rd, Charlotte, NC 28210 · Mecklenburg CountyPhone(704) 495-6334
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Catherine Brittain Callahan is affiliated with 5 sites of care and 2 medical groups
Dr. Callahan's primary practice is Tryon Medical Partners in Charlotte, North Carolina. Dr. Callahan is also affiliated with Atrium Health Carolinas Medical Center. The medical group on file is Tryon Medical Partners. Dmand AI also links Dr. Callahan to 1 more hospital, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Catherine Brittain Callahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Callahan practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Tryon Medical Partners | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Catherine Brittain Callahan is one of 3,705 internists in North Carolina
Internal medicine is Dr. Callahan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Callahan's licenses on file in 2 states: North Carolina and South Carolina.
Specialties and state licenses
- Internal medicine, North CarolinaPrimary
- South Carolina license
Internists near Dr. Callahan
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Catherine Brittain Callahan billed Medicare for 3,739 services in 2024
CMS data shows 3,739 Medicare services from Dr. Callahan across 30 procedure codes in 2024, for 426 Medicare patients. Medicare paid $139,065 for them. Every service was in an office.
Dr. Callahan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 2,1112024: 2,2346%
- Office and hospital visits
- 2023: 7272024: 7523%
- Other services
- 2023: 5202024: 68632%
- Tests and treatments
- 2023: 702024: 674%
Dr. Callahan compared with the North Carolina median for internists, 2024
- Dr. Callahan
- North Carolina median
- Medicare services
- 3,739vs 5217.2 times
- Medicare patients
- 426vs 1852.3 times
- Part D claims
- 7,071vs 27226.0 times
Medians across 3,695 internists in North Carolina with Dmand AI profiles that report each measure.
Dr. Callahan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Callahan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Callahan and other internists in North Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Catherine Brittain Callahan treated 426 Medicare patients in 2024, average age 76
CMS counts 426 Medicare patients who saw Dr. Callahan in 2024. The largest group is 65 to 74, with 192 patients. 75% of them have high cholesterol, and 58% have high blood pressure. Their average risk score is 1.04, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Callahan's median patient age at 67, with 80% women.
Dr. Callahan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Callahan's Medicare patients by sex, 2024
- Women36085%
- Men6615%
Chronic conditions among Dr. Callahan's Medicare patients, 2024
- High cholesterol75%
- High blood pressure58%
- Arthritis46%
- Osteoporosis28%
- Mood disorders26%
- Depression25%
- Anxiety20%
- Ischemic heart disease20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Callahan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women80%
- Men18%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Catherine Brittain Callahan wrote 7,744 Medicare Part D claims in 2024
In 2024, Dr. Callahan wrote 7,744 Medicare Part D claims for 704 patients. 86% of them were for generic drugs. CMS names the drug for 7,071 of them, across 110 drugs with 11 or more claims each, at $476,464 in total drug cost. In 2023, CMS named 6,706 claims across 111 drugs.
Dr. Callahan's Part D claims by kind of drug, 2024
- Generic6,680 claims86%
- Brand-name1,028 claims13%
- Other36 claims0%
Dr. Callahan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Callahan's Part D claims, 2024
- Opioids2%124 of 7,744 claims
- Antibiotics2%141 of 7,744 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6,7062024: 7,0715%
Drugs named by CMS: 110 in 2024, 111 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Catherine Brittain Callahan offers telehealth to Medicare patients
CMS lists Dr. Callahan as offering telehealth.
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Catherine Brittain Callahan received $3,794 in industry payments from 2016 to 2025
CMS Open Payments shows 225 general payments to Dr. Callahan from 39 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Novo Nordisk Inc paid the most, $539.
General payments to Dr. Callahan by program year, 2016 to 2025
General payments to Dr. Callahan by kind, 2016 to 2025
- Food and beverage$3,77399%
- Education$201%
Companies that paid Dr. Callahan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Catherine Brittain Callahan graduated from Medical College of Georgia School of Medicine
Dr. Callahan graduated from Medical College of Georgia School of Medicine in 2006.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Catherine Brittain Callahan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Catherine Brittain Callahan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Catherine Brittain Callahan's NPI number?
Dr. Catherine Brittain Callahan's NPI number is 1407870926. It was assigned on July 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Catherine Brittain Callahan?
Dr. Catherine Brittain Callahan is an internist in Charlotte, North Carolina. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Catherine Brittain Callahan practice?
Dr. Callahan practices at 5960 Fairview Rd, Charlotte, NC 28210. Dr. Callahan's primary practice is Tryon Medical Partners in Charlotte, North Carolina. Dmand AI also links Dr. Callahan to 1 hospital, 2 group practices and clinics and 1 medical group.
What is Dr. Catherine Brittain Callahan's office phone number?
The practice phone on file for Dr. Callahan is (704) 495-6334.
What is Dr. Catherine Brittain Callahan's medical license number?
Dr. Callahan holds North Carolina license 200101316, one of the licenses on file in 2 states.
Which states has Dr. Catherine Brittain Callahan been licensed in?
Dmand AI has state licenses on file for Dr. Callahan in North Carolina and South Carolina.
Which hospitals is Dr. Catherine Brittain Callahan affiliated with?
Dr. Callahan is affiliated with Atrium Health Carolinas Medical Center. Dmand AI links Dr. Callahan to 1 more hospital.
What medical group is Dr. Catherine Brittain Callahan part of?
Dr. Callahan is linked to Tryon Medical Partners. Dmand AI links Dr. Callahan to 1 more medical group.
Does Dr. Catherine Brittain Callahan accept Medicare?
Yes. CMS data shows Dr. Callahan billed Medicare for 3,739 services in 2024.
Does Dr. Catherine Brittain Callahan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Callahan as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Catherine Brittain Callahan see?
CMS counts 426 Medicare patients who saw Dr. Callahan in 2024, with an average age of 76.
What services does Dr. Catherine Brittain Callahan bill to Medicare?
In 2024, Dr. Callahan's most billed Medicare services were office visit, established patient (99214), lab and pathology test (80053) and lab and pathology test (85025).
Where did Dr. Catherine Brittain Callahan go to medical school?
Dr. Callahan graduated from Medical College of Georgia School of Medicine in 2006.
What drugs does Dr. Catherine Brittain Callahan prescribe most?
In 2024 Medicare Part D data, Dr. Callahan's most prescribed drugs by claims were Rosuvastatin Calcium, Levothyroxine Sodium and Atorvastatin Calcium.
Has Dr. Catherine Brittain Callahan received payments from drug or device companies?
CMS Open Payments shows $3,794 in general payments to Dr. Callahan from 39 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Catherine Brittain Callahan been practicing?
Dr. Callahan graduated from medical school in 2006, 20 years ago.
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