NPPES file of Aug 9, 2026

Thomas Oran Dalton, M.D.

Geriatric Medicine (Internal Medicine) Physician · Dallas, TX

Thomas Oran Dalton, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Dallas, Texas, and NPI 1124286661, issued on May 31, 2008. Check the license (Texas N6849, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1124286661
Name
Thomas Oran Dalton
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
N6849 TX
Self-reported in NPPES; status is on the state search
Practice location
5323 Harry Hines Boulevard, Dallas, TX 75390
Phone
(214) 645-8650
Enumerated
May 31, 2008
Record last updated
Jul 14, 2014 (not updated in 12 years: call before relying on the address or phone)
Fax
(214) 645-8601
Medicare enrollment
Enrolled (PECOS I20140730001887); accepts Medicare assignment
Medical or professional school
University Of Texas Southwestern Medical School At Dallas, 2008
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest geriatric medicine (internal medicine) physician records → All 256 in Texas → Look up another NPI →

Also registered at 5323 Harry Hines Boulevard

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kareem Abdelfattah, MDSurgery Physician1053510339
  2. Habib Abla, MDStudent in an Organized Health Care Education/Training Program1275335705
  3. Soney Abraham, NPFamily Nurse Practitioner1003232018
  4. Jessica Abramowitz, MDEndocrinology, Diabetes & Metabolism Physician1184856759
  5. Elizabeth AdamsStudent in an Organized Health Care Education/Training Program1710590344
  6. Harsh Agarwal, M.D.Student in an Organized Health Care Education/Training Program1437999174

Verify Thomas Oran Dalton in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license N6849    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Texas license search

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79% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

893 Medicare Part D claims for 148 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 25 claims were for opioids.

  1. Thomas Dalton893
  2. Specialty average4,246

Most prescribed

  1. Atorvastatin Calcium61 claims
  2. Losartan Potassium50 claims
  3. Amlodipine Besylate45 claims
  4. Tamsulosin Hcl37 claims
  5. Allopurinol32 claims
  6. Levothyroxine Sodium32 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

  1. University OF Texas Southwestern Medical Center AT DallasDallas, TX

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Thomas Oran Dalton among 256 geriatric medicine (internal medicine) physician records in Texas

Thomas Oran Dalton, M.D. is one of 256 geriatric medicine (internal medicine) physician records with a practice address in Texas. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 67% of them.

  • NPI issued2008 · 67% of these records are older, 29% newer
  • In a Medicare fileYes · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 56% of these records are
  • Graduated2008 · median 2000 among the 143 with a school on file
  • Record last updated2014 · 48% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in Texas

There are 256 geriatric medicine (internal medicine) physician records in Texas.

All 256 in Texas → Every provider in Dallas → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. Ravindra Bharadwaj, MDDallas, TX 753901477526044
  2. Tara Duval, MDDallas, TX 753901154539534
  3. Kathryn Eubank, M.D.Dallas, TX 753901508911181
  4. Anupama Gangavati, M.D.Dallas, TX 753901831298140
  5. Ihab Hajjar, MD,MSDallas, TX 753901891723912
  6. Namirah Jamshed, MDDallas, TX 753901700917572
  7. Amy Johnson, M.D.Dallas, TX 753901942407572
  8. Lynne Kirk, MDDallas, TX 753901225097348

Common questions

What is Thomas Oran Dalton, M.D.'s NPI number?

Thomas Oran Dalton, M.D.'s National Provider Identifier (NPI) is 1124286661, issued on May 31, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Thomas Oran Dalton, M.D. located?

The NPPES record lists a practice address at 5323 Harry Hines Boulevard, Dallas, TX, 75390. Phone: (214) 645-8650. Providers update this record themselves, so call before visiting.

How can I verify Thomas Oran Dalton, M.D.'s license?

NPPES lists Texas license number N6849, 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 Thomas Oran Dalton, M.D. prescribe under Medicare Part D?

In 2024, Thomas Oran Dalton, M.D. had 893 Medicare Part D claims for 148 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.