Colin J. McMahon, MD
Internal Medicine Physician · Lockport, NY
Colin J. McMahon, MD is an internal medicine physician with a practice address in Lockport, New York, and NPI 1427015650, issued on May 1, 2006. Check the license (New York 186388, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Colin J. McMahon
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 186388 NY
Self-reported in NPPES; status is on the state search - Practice location
- 521 East Ave, Lockport, NY 14094
- Phone
- (716) 514-5700
- Enumerated
- May 1, 2006
- Record last updated
- Apr 3, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 01439803 NY
- Medicare enrollment
- Enrolled (PECOS I20040430000869); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 521 East Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mirza Beg, MDFamily Medicine Physician1710911268
- Kevin BeneyMedical Laboratory Technician1972129666
- James Bolton, D.O.Family Medicine Physician1861848392
- Parag Desai, MDHospitalist Physician1164601761
- Janice Errick, MDAnatomic Pathology & Clinical Pathology Physician1104874205
- Hany Fattouch, M.D.Anesthesiology Physician1841267838
Verify Colin J. McMahon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 186388Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average internal medicine physician in 2024
494 Medicare Part D claims for 217 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. 11 claims were for opioids.
Most prescribed
- Cefdinir76 claims
- Prednisone51 claims
- Jardiance22 claims
- Spironolactone22 claims
- Eliquis21 claims
- Azithromycin20 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
- Buffalo-Niagara Hospitalists LLCLewiston, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Colin J. McMahon among 12,067 internal medicine physician records in New York
Colin J. McMahon, MD is one of 12,067 internal medicine physician records with a practice address in New York. 79% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1990 · median 2002 among the 7,221 with a school on file
- Record last updated2020 · 61% 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in New York
There are 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Lockport → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Edgar Bassig, MDLockport, NY 140941205891306
- Christopher Beney, MDLockport, NY 140941669492096
- Jasmeet Gill, M.D.Lockport, NY 140941275702300
- Gregory Jehrio, MDLockport, NY 140941033193339
- Vigel Varkey, M.D.Lockport, NY 140941659379691
- Ei Cho, M.B.,B.SLewiston, NY 140921962961045
- Robert Divencenzo, D.O.Lewiston, NY 140921467450833
- Yahya Hashmi, MDLewiston, NY 140921861433930
Common questions
What is Colin J. McMahon, MD's NPI number?
Colin J. McMahon, MD's National Provider Identifier (NPI) is 1427015650, issued on May 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Colin J. McMahon, MD located?
The NPPES record lists a practice address at 521 East Ave, Lockport, NY, 14094. Phone: (716) 514-5700. Providers update this record themselves, so call before visiting.
How can I verify Colin J. McMahon, MD's license?
NPPES lists New York license number 186388, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Colin J. McMahon, MD prescribe under Medicare Part D?
In 2024, Colin J. McMahon, MD had 494 Medicare Part D claims for 217 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.