Michael Lloyd McMahon, M.D.
Internal Medicine Physician · Nederland, TX
Michael Lloyd McMahon, M.D. is an internal medicine physician with a practice address in Nederland, Texas, and NPI 1548240641, issued on Jan 17, 2006. Check the license (Texas K0347, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Michael Lloyd McMahon
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- K0347 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1003 Nederland Ave, Nederland, TX 77627
- Phone
- (409) 344-4466
- Enumerated
- Jan 17, 2006
- Record last updated
- Jan 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (409) 600-8525
- Medicare enrollment
- Enrolled (PECOS I20050808000536); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 1003 Nederland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- George Brown, MDFamily Medicine Physician1497703334
- Adam Jaynes, FNPFamily Nurse Practitioner1154875441
- Brent MazzagateFamily Nurse Practitioner1952904104
Verify Michael Lloyd McMahon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license K0347Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.2 times the Medicare Part D claims of the average internal medicine physician in 2024
13,444 Medicare Part D claims for 574 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 132 claims were for opioids.
Most prescribed
- Atorvastatin Calcium639 claims
- Levothyroxine Sodium584 claims
- Eliquis423 claims
- Pantoprazole Sodium379 claims
- Donepezil Hcl355 claims
- Furosemide332 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
- Mid County Medical Group PANederland, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Lloyd McMahon among 9,175 internal medicine physician records in Texas
Michael Lloyd McMahon, 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 fileYes · 66% of these records are
- Graduated1991 · 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).
9 internal medicine physician records list a practice address in Nederland
They are 9 of the 178 NPPES records with a practice address in Nederland, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Nederland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- John Badlissi, MDNederland, TX 776271578753265
- Michael Badlissi, M.D.Nederland, TX 776271770710337
- Kristopher Dela Cruz, M.D.Nederland, TX 776271821403809
- William George, M.D.Nederland, TX 776271144229659
- Kahtan Kaissi, M.D.Nederland, TX 776271518999226
- William Novelli, MD, MPHNederland, TX 776271679571319
- Sreedhar Polavarapu, M.D.Nederland, TX 776271427040815
- Michael Thomas, MDNederland, TX 776271801955349
Common questions
What is Michael Lloyd McMahon, M.D.'s NPI number?
Michael Lloyd McMahon, M.D.'s National Provider Identifier (NPI) is 1548240641, issued on Jan 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Lloyd McMahon, M.D. located?
The NPPES record lists a practice address at 1003 Nederland Ave, Nederland, TX, 77627. Phone: (409) 344-4466. Providers update this record themselves, so call before visiting.
How can I verify Michael Lloyd McMahon, M.D.'s license?
NPPES lists Texas license number K0347, 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 Michael Lloyd McMahon, M.D. prescribe under Medicare Part D?
In 2024, Michael Lloyd McMahon, M.D. had 13,444 Medicare Part D claims for 574 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.