Leon P. McLean, MD
Gastroenterology Physician · Derry, NH
Leon P. McLean, MD is a gastroenterology physician with a practice address in Derry, New Hampshire, and NPI 1457495806, issued on Feb 19, 2007. Check the license (New Hampshire NH17841, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Leon P. McLean
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- NH17841 NH
Self-reported in NPPES; status is on the state search - Practice location
- 6 Tsienneto RD Ste 301, Derry, NH 03038
- Phone
- (603) 432-8802
- Enumerated
- Feb 19, 2007
- Record last updated
- Mar 8, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (603) 432-8802
- Medicaid ID
- 420209100 NH
- Medicare enrollment
- Enrolled (PECOS I20161212002066); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2006
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 110 in New Hampshire → Look up another NPI →
Also registered at 6 Tsienneto RD Ste 301
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Allison AnastasoffFamily Nurse Practitioner1326491325
- Alyssa Dunn, PA-CMedical Physician Assistant1790139244
- Steven Tsistrakis, M.DGastroenterology Physician1992168389
Verify Leon P. McLean in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license NH17841Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% fewer Medicare Part D claims than the average gastroenterology physician in 2024
520 Medicare Part D claims for 194 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Pantoprazole Sodium152 claims
- Omeprazole59 claims
- Gavilyte-G49 claims
- Famotidine33 claims
- Peg-3350 And Electrolytes32 claims
- Esomeprazole Magnesium23 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.
Industry payments in 2024: $23,497.70
60 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Granite State Gastrointestinal Consultants PLLCBedford, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leon P. McLean among 110 gastroenterology physician records in New Hampshire
Leon P. McLean, MD is one of 110 gastroenterology physician records with a practice address in New Hampshire. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 58% of them.
- NPI issued2007 · 58% of these records are older, 29% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2006 · median 2002 among the 80 with a school on file
- Record last updated2017 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in New Hampshire
There are 110 gastroenterology physician records in New Hampshire.
All 110 in New Hampshire → Every provider in Derry → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Knut Roalsvig, MDDerry, NH 030381154381614
- Steven Taylor, MDDerry, NH 030381134106990
- Steven Tsistrakis, M.DDerry, NH 030381992168389
- Laura Horton, M.D.Londonderry, NH 030531609225242
- Chengta Dai, MDNashua, NH 030601023189891
- Alan Freeman, M.D.,FRCPC,FACPNashua, NH 030601457322638
- Prasanna Gulur, M.D.Nashua, NH 030601164443750
- Michael Kaczanowski, M.D.Nashua, NH 030601639371263
Common questions
What is Leon P. McLean, MD's NPI number?
Leon P. McLean, MD's National Provider Identifier (NPI) is 1457495806, issued on Feb 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Leon P. McLean, MD located?
The NPPES record lists a practice address at 6 Tsienneto RD Ste 301, Derry, NH, 03038. Phone: (603) 432-8802. Providers update this record themselves, so call before visiting.
How can I verify Leon P. McLean, MD's license?
NPPES lists New Hampshire license number NH17841, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leon P. McLean, MD prescribe under Medicare Part D?
In 2024, Leon P. McLean, MD had 520 Medicare Part D claims for 194 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.