Grant Stewart Coan, MD
Internal Medicine Physician · Houston, TX
Grant Stewart Coan, MD is an internal medicine physician with a practice address in Houston, Texas, and NPI 1518548213, issued on Apr 15, 2021. Check the license on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Grant Stewart Coan
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MD220271 OR
MD61550815 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Baylor Plz, Houston, TX 77030
- Phone
- (713) 791-1414
- Enumerated
- Apr 15, 2021
- Record last updated
- Mar 2, 2025
- 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 Grant Stewart Coan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average internal medicine physician in 2024
331 Medicare Part D claims for 81 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium20 claims
- Lisinopril20 claims
- Amlodipine Besylate19 claims
- Losartan Potassium13 claims
- Isosorbide Mononitrate Er12 claims
- Metformin Hcl12 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.
Grant Stewart Coan among 9,175 internal medicine physician records in Texas
Grant Stewart Coan, MD 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 2021, is newer than 88% of them.
- NPI issued2021 · 88% of these records are older, 9% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2025 · 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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- 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 Grant Stewart Coan, MD's NPI number?
Grant Stewart Coan, MD's National Provider Identifier (NPI) is 1518548213, issued on Apr 15, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Grant Stewart Coan, MD located?
The NPPES record lists a practice address at 1 Baylor Plz, Houston, TX, 77030. Phone: (713) 791-1414. Providers update this record themselves, so call before visiting.
How can I verify Grant Stewart Coan, MD's license?
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 Grant Stewart Coan, MD prescribe under Medicare Part D?
In 2024, Grant Stewart Coan, MD had 331 Medicare Part D claims for 81 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.