NPPES file of Aug 9, 2026

Gregory O. Appleton, M.D.

Cardiovascular Disease Physician · Houston, TX

Gregory O. Appleton, M.D. is a cardiovascular disease physician with a practice address in Houston, Texas, and NPI 1114927928, issued on Jul 22, 2005. Check the license (Texas L6265, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1114927928
Name
Gregory O. Appleton
Credential
M.D.
Primary taxonomy
Cardiovascular Disease Physician 207RC0000X
License number
L6265 TX
Self-reported in NPPES; status is on the state search
Practice location
6441 Main St, Houston, TX 77030
Phone
(281) 579-0061
Enumerated
Jul 22, 2005
Record last updated
May 28, 2026
Medicare enrollment
Enrolled (PECOS I20040227000591); accepts Medicare assignment
Medical or professional school
University Of California, San Francisco School Of Medicine, 1989
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 cardiovascular disease physician records → All 1,603 in Texas → Look up another NPI →

Also registered at 6441 Main St

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

  1. James Asbury, M.D.Critical Care Medicine (Internal Medicine) Physician1174631535
  2. Elaine LowerySpeech-Language Pathologist1992285720
  3. Jennifer Naus, PT, DPTPhysical Therapist1619894839
  4. Abbye Robinson, SLPSpeech-Language Pathologist1366215774

Verify Gregory O. Appleton in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license L6265    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Knd Development 59 LLCHouston, TX

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

Gregory O. Appleton among 1,603 cardiovascular disease physician records in Texas

Gregory O. Appleton, M.D. is one of 1,603 cardiovascular disease physician records with a practice address in Texas. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 80% newer
  • In a Medicare fileYes · 88% of these records are
  • In the CMS Doctors and Clinicians fileYes · 76% of these records are
  • Graduated1989 · median 1998 among the 1,219 with a school on file
  • Record last updated2026 · 47% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Cardiovascular Disease Physician providers in Texas

There are 1,603 cardiovascular disease physician records in Texas.

All 1,603 in Texas → Every provider in Houston → Cardiovascular Disease Physician nationwide →

The 8 cardiovascular disease physician records with the nearest ZIP codes

  1. Jaime Benrey, MDHouston, TX 770301003810854
  2. Michael Bungo, M.D.Houston, TX 770301497756654
  3. Sayed Feghali, M.D.Houston, TX 770301326040486
  4. Jorge Garcia-Gregory, MDHouston, TX 770301760486450
  5. Ihab Hamzeh, MDHouston, TX 770301700886934
  6. Surendra Jain, MDHouston, TX 770301326036195
  7. Milton Klein, MDHouston, TX 770301689673568
  8. Edward Massin, MDHouston, TX 770301528062379

Common questions

What is Gregory O. Appleton, M.D.'s NPI number?

Gregory O. Appleton, M.D.'s National Provider Identifier (NPI) is 1114927928, issued on Jul 22, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Gregory O. Appleton, M.D. located?

The NPPES record lists a practice address at 6441 Main St, Houston, TX, 77030. Phone: (281) 579-0061. Providers update this record themselves, so call before visiting.

How can I verify Gregory O. Appleton, M.D.'s license?

NPPES lists Texas license number L6265, 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.

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.