Dr. Carl Thomas Long III, MD
- Industry payments
- $34
- Affiliated sites
- 1
- Medical group
- 1
- State licenses
- 2
- Year NPI issued
- 2006
- Practice address
- 4708 Alliance Blvd, Plano, TX 75093-5339
- Practice phone
- Call (972) 758-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Dallas Diagnostic Association
Multi-specialty group site · Plano, Texas
Find Dr. Long'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. Carl Thomas Long III is an internist in Plano, Texas
Dr. Long practices at Dallas Diagnostic Association in Plano, Texas.
Dr. Long's NPI, 1306951215, was assigned on August 20, 2006. Dr. Long graduated from UTMB Health in 1974. Dr. Long holds Texas license E2682.
- NPI
- 1306951215NPI Registry (opens in a new tab)
- NPI enumeration date
- August 20, 2006
- NPI status
- Active
- Practice phone
- (972) 758-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1974
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Carl Thomas Long III practices at Dallas Diagnostic Association in Plano, Texas
Dr. Long's primary practice is Dallas Diagnostic Association, at 4708 Alliance Blvd, Plano, TX 75093-5339. The practice phone is (972) 758-6000.
- Dallas Diagnostic Association4708 Alliance Blvd, Plano, TX 75093-5339Phone(972) 758-6000
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Carl Thomas Long III is affiliated with 1 site of care and 1 medical group
Dr. Long's primary practice is Dallas Diagnostic Association in Plano, Texas. Dmand AI also links Dr. Long to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Carl Thomas Long III's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Long practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dallas Diagnostic Association | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Carl Thomas Long III is one of 8,437 internists in Texas
Internal medicine is Dr. Long's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Long is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Long's licenses on file in 2 states: Texas and Montana.
Specialties and state licenses
- Internal medicine, TexasPrimary
- Montana license
Internists near Dr. Long
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. Carl Thomas Long III's patients have a median age of 80
Across all payers, Dmand AI patient panel data puts Dr. Long's median patient age at 80, with 70% women.
Dr. Long's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 80
Patient panel by sex, all payers
- Women70%
- Men30%
Source: Dmand AI Patient Panel Data
Dr. Carl Thomas Long III received $34 in industry payments from 2017 to 2024
CMS Open Payments shows 2 general payments to Dr. Long from 2 drug and device companies from 2017 to 2024. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $23.
General payments to Dr. Long by program year, 2017 to 2024
Companies that paid Dr. Long the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Carl Thomas Long III graduated from UTMB Health
Dr. Long graduated from UTMB Health in 1974.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Carl Thomas Long III'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 | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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. Carl Thomas Long III
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. Carl Thomas Long III's NPI number?
Dr. Carl Thomas Long III's NPI number is 1306951215. It was assigned on August 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Carl Thomas Long III?
Dr. Carl Thomas Long III is an internist in Plano, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Carl Thomas Long III practice?
Dr. Long practices at 4708 Alliance Blvd, Plano, TX 75093-5339. Dr. Long's primary practice is Dallas Diagnostic Association in Plano, Texas. Dmand AI also links Dr. Long to 1 medical group.
What is Dr. Carl Thomas Long III's office phone number?
The practice phone on file for Dr. Long is (972) 758-6000.
What is Dr. Carl Thomas Long III's medical license number?
Dr. Long holds Texas license E2682, one of the licenses on file in 2 states.
Which states has Dr. Carl Thomas Long III been licensed in?
Dmand AI has state licenses on file for Dr. Long in Texas (1974 to 2026) and Montana (2014 to 2026).
Is Dr. Carl Thomas Long III board certified?
Yes. Dr. Long is board certified in internal medicine by the American Board of Internal Medicine.
Where did Dr. Carl Thomas Long III go to medical school?
Dr. Long graduated from UTMB Health in 1974.
Has Dr. Carl Thomas Long III received payments from drug or device companies?
CMS Open Payments shows $34 in general payments to Dr. Long from 2 companies from 2017 to 2024. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Carl Thomas Long III been practicing?
Dr. Long graduated from medical school in 1974, 52 years ago.
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