Alexander Constantine, M.D.
Internal Medicine Physician · Houston, TX
Alexander Constantine, M.D. is an internal medicine physician with a practice address in Houston, Texas, and NPI 1902332901, issued on May 11, 2017. Check the license (Texas S9670, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Alexander Constantine
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- S9670 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1 Baylor Plz, Houston, TX 77030
- Phone
- (713) 798-5588
- Enumerated
- May 11, 2017
- Record last updated
- Sep 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid IDs
- 425869102 TX
425869103 TX
425869101 TX - Medicare enrollment
- Enrolled (PECOS I20210614002802); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2017
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 1 Baylor Plz
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alexander Constantine in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license S9670Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
347 Medicare Part D claims for 113 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium29 claims
- Lisinopril19 claims
- Amlodipine Besylate14 claims
- Losartan Potassium14 claims
- Levothyroxine Sodium13 claims
- Albuterol Sulfate Hfa12 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
- Kelsey-Seybold Medical Group, PLLCSugar Land, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander Constantine among 9,175 internal medicine physician records in Texas
Alexander Constantine, 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 2017, is newer than 77% of them.
- NPI issued2017 · 77% of these records are older, 21% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2017 · median 2004 among the 6,088 with a school on file
- Record last updated2021 · 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
- Ketti Awad, MDHouston, TX 770301740284710
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- James Baker, MDHouston, TX 770301477549566
- Ana Blackmon, M.D.Houston, TX 770301962402446
- Maria Cruz-Carreras, MDHouston, TX 770301376533893
- Marina George, MDHouston, TX 770301780680009
- Barry Goodfriend, MDHouston, TX 770301588666218
- Betty Halpern, MDHouston, TX 770301942292685
Common questions
What is Alexander Constantine, M.D.'s NPI number?
Alexander Constantine, M.D.'s National Provider Identifier (NPI) is 1902332901, issued on May 11, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Alexander Constantine, M.D. located?
The NPPES record lists a practice address at 1 Baylor Plz, Houston, TX, 77030. Phone: (713) 798-5588. Providers update this record themselves, so call before visiting.
How can I verify Alexander Constantine, M.D.'s license?
NPPES lists Texas license number S9670, 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 Alexander Constantine, M.D. prescribe under Medicare Part D?
In 2024, Alexander Constantine, M.D. had 347 Medicare Part D claims for 113 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.