John S. Ferris, MD
Internal Medicine Physician · Grapevine, TX
John S. Ferris, MD is an internal medicine physician with a practice address in Grapevine, Texas, and NPI 1538257084, issued on Oct 10, 2006. Check the license (Texas E6346, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John S. Ferris
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- E6346 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1604 Lancaster Dr, Grapevine, TX 76051
- Phone
- (817) 481-8661
- Enumerated
- Oct 10, 2006
- Record last updated
- Jun 28, 2022
- Fax
- (817) 416-8801
- Medicaid ID
- 1279085 TX
- Entity
- Type 1 · individual
Also registered at 1604 Lancaster Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jorge Candiotti, PA-CPhysician Assistant1245877679
- Shopana Ganpath, M.D.Internal Medicine Physician1225305147
- Martyn Gordon, MDInternal Medicine Physician1972689750
- Melissa Kujawski, NP-CNurse Practitioner1376140954
- Ashley Netting, RD,LDRegistered Dietitian1114163995
- Lija Thomas, M.D.Family Medicine Physician1891135125
Verify John S. Ferris in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license E6346Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
147 Medicare Part D claims for 67 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium18 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.
27 internal medicine physician records list a practice address in Grapevine
They are 27 of the 1,104 NPPES records with a practice address in Grapevine, and 9,175 internal medicine physician records in Texas.
All 27 in Grapevine → All 9,175 in Texas → Every provider in Grapevine →
Other internal medicine physician records in Texas
- Muhammad A. Sattar, MDDallas, TX1760465553
- Gayatri Aaluri, MDGalveston, TX1821928508
- Anunaya AashishDenton, TX1134246374
- Queenie Ann Abad, M.D.San Antonio, TX1174979785
- Fuad Abaleka, M.DLubbock, TX1861925596
- Carol Abalihi, M.D.El Paso, TX1326136243
- Oliverio Abarca Guzman, MDHarlingen, TX1346972940
- Obinna Abaribe, M.DMansfield, TX1457704355
- Enyinnaya Abarikwu, MDTyler, TX1174788178
- Sulaiman Abawi, D.O.Frisco, TX1780845255
Common questions
What is John S. Ferris, MD's NPI number?
John S. Ferris, MD's National Provider Identifier (NPI) is 1538257084, issued on Oct 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John S. Ferris, MD located?
The NPPES record lists a practice address at 1604 Lancaster Dr, Grapevine, TX, 76051. Phone: (817) 481-8661. Providers update this record themselves, so call before visiting.
How can I verify John S. Ferris, MD's license?
NPPES lists Texas license number E6346, 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 John S. Ferris, MD prescribe under Medicare Part D?
In 2024, John S. Ferris, MD had 147 Medicare Part D claims for 67 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.