Harvey H. Dayton, M.D.
Internal Medicine Physician · Houston, TX
Harvey H. Dayton, M.D. is an internal medicine physician with a practice address in Houston, Texas, and NPI 1710091137, issued on Aug 19, 2006. Check the license (Texas G1884, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Harvey H. Dayton
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G1884 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1320 Quitman St, Houston, TX 77009
- Phone
- (713) 227-8246
- Enumerated
- Aug 19, 2006
- Record last updated
- Nov 28, 2023
- Fax
- (713) 222-0464
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 1320 Quitman St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Morgan, LCSWClinical Social Worker1750548517
Verify Harvey H. Dayton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license G1884Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,614 Medicare Part D claims for 407 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 35 claims were for opioids.
Most prescribed
- Atorvastatin Calcium106 claims
- Amlodipine Besylate73 claims
- Losartan Potassium67 claims
- Lisinopril65 claims
- Metformin Hcl57 claims
- Levothyroxine Sodium50 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.
Harvey H. Dayton among 9,175 internal medicine physician records in Texas
Harvey H. Dayton, M.D. 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2023 · 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).
1,488 internal medicine physician records list a practice address in Houston
They are 1,488 of the 61,221 NPPES records with a practice address in Houston, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Houston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Ngan Thien Dao, D.O.Houston, TX 770081376830364
- Oladipo Fadayomi, M.D.Houston, TX 770081316383565
- Frene' Lacour-Chestnut, M.D.Houston, TX 770081316196884
- Joo Lee, DOHouston, TX 770081477944130
- Maria Nomani, DOHouston, TX 770081669000782
- Omare Okotie-Eboh, MDHouston, TX 770081891352472
Common questions
What is Harvey H. Dayton, M.D.'s NPI number?
Harvey H. Dayton, M.D.'s National Provider Identifier (NPI) is 1710091137, issued on Aug 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harvey H. Dayton, M.D. located?
The NPPES record lists a practice address at 1320 Quitman St, Houston, TX, 77009. Phone: (713) 227-8246. Providers update this record themselves, so call before visiting.
How can I verify Harvey H. Dayton, M.D.'s license?
NPPES lists Texas license number G1884, 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 Harvey H. Dayton, M.D. prescribe under Medicare Part D?
In 2024, Harvey H. Dayton, M.D. had 1,614 Medicare Part D claims for 407 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.