Ewan Douglas Johnson, MD, PHD
Internal Medicine Physician · Tomball, TX
Ewan Douglas Johnson, MD, PHD is an internal medicine physician with a practice address in Tomball, Texas, and NPI 1043521313, issued on Jul 1, 2010. Check the license (Texas N8018, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Ewan Douglas Johnson
- Credential
- MD, PHD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- N8018 TX
Self-reported in NPPES; status is on the state search - Practice location
- 13414 Medical Complex Dr Ste 6, Tomball, TX 77375
- Phone
- (281) 415-6687
- Enumerated
- Jul 1, 2010
- Record last updated
- Jun 11, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100920000379); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 2004
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Verify Ewan Douglas Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license N8018Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
274 Medicare Part D claims for 167 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 20 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass25 claims
- Cefdinir22 claims
- Meloxicam21 claims
- Dexamethasone16 claims
- Nitrofurantoin Mono-Macro16 claims
- Tramadol Hcl15 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 2 group practices
- Concord Medical Group OF Texas PLLCLittlefield, TX
- Exceptional Physicians Group Yuma Hospital PLLCYuma, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ewan Douglas Johnson among 9,175 internal medicine physician records in Texas
Ewan Douglas Johnson, MD, PHD 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 2010, is newer than 58% of them.
- NPI issued2010 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2004 · 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).
25 internal medicine physician records list a practice address in Tomball
They are 25 of the 1,068 NPPES records with a practice address in Tomball, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Tomball → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Asiya Ahmed, M.D.Tomball, TX 773751013966316
- Shamaila Aslam, MDTomball, TX 773751992748545
- Balbir Chahal, M.D.Tomball, TX 773751508850066
- Muhammad Irfan, M.D.Tomball, TX 773751972570489
- Adnan Jafri, M.D.Tomball, TX 773751699782417
- Mark Le, M.D.Tomball, TX 773751033153002
- David Le, M.D., P.A.Tomball, TX 773751861438525
- Hang Le, D.O.Tomball, TX 773751982618310
Common questions
What is Ewan Douglas Johnson, MD, PHD's NPI number?
Ewan Douglas Johnson, MD, PHD's National Provider Identifier (NPI) is 1043521313, issued on Jul 1, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Ewan Douglas Johnson, MD, PHD located?
The NPPES record lists a practice address at 13414 Medical Complex Dr Ste 6, Tomball, TX, 77375. Phone: (281) 415-6687. Providers update this record themselves, so call before visiting.
How can I verify Ewan Douglas Johnson, MD, PHD's license?
NPPES lists Texas license number N8018, 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 Ewan Douglas Johnson, MD, PHD prescribe under Medicare Part D?
In 2024, Ewan Douglas Johnson, MD, PHD had 274 Medicare Part D claims for 167 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.