Mark Kenneth Detweiler, M.D.
Specialist · Londonderry, NH
Mark Kenneth Detweiler, M.D. is a specialist with a practice address in Londonderry, New Hampshire, and NPI 1548344583, issued on Oct 25, 2006. Check the license (New Hampshire 6919, as entered in NPPES) with the New Hampshire board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Kenneth Detweiler
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 6919 NH
Self-reported in NPPES; status is on the state search - Practice location
- 1B Commons Dr, Londonderry, NH 03053
- Phone
- (603) 818-4712
- Enumerated
- Oct 25, 2006
- Record last updated
- Apr 24, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (603) 421-6899
- Medicare enrollment
- Enrolled (PECOS I20060511000007); accepts Medicare assignment
- Medical or professional school
- Pennsylvania State University College Of Medicine, 1979
- Entity
- Type 1 · individual
8 nearest specialist records → All 1,010 in New Hampshire → Look up another NPI →
Also registered at 1B Commons Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Donna Eyssi-Dow, LICSWClinical Social Worker1467405142
Verify Mark Kenneth Detweiler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New Hampshire board licenses this profession
Search for license 6919Check 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 specialist in 2024
128 Medicare Part D claims for 28 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. 21 claims were for opioids.
Most prescribed
- Nystatin18 claims
- Oxycodone Hcl17 claims
- Famotidine13 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.
Mark Kenneth Detweiler among 1,010 specialist records in New Hampshire
Mark Kenneth Detweiler, M.D. is one of 1,010 specialist records with a practice address in New Hampshire. 2% 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 1% of them.
- NPI issued2006 · 1% of these records are older, 89% newer
- In a Medicare fileYes · 2% of these records are
- In the CMS Doctors and Clinicians fileYes · 2% of these records are
- Graduated1979 · median 1985 among the 17 with a school on file
- Record last updated2019 · 71% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in New Hampshire
There are 1,010 specialist records in New Hampshire.
All 1,010 in New Hampshire → Every provider in Londonderry → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Blair Macdonald, DPTLondonderry, NH 030531598994196
- Allyssa Bedard, L.M.T.Merrimack, NH 030541851777437
- Todd Brede, PSY.DLitchfield, NH 030521841232220
- Mary Catherine LavalleeMerrimack, NH 030541932028834
- Noelle Frauton, O.T.Merrimack, NH 030541427123264
- Celia Gatsas, OTR/LMerrimack, NH 030541710962790
- Edward Holdgate, PTAMerrimack, NH 030541790111425
- Rebecca DecotiisHudson, NH 030511497154256
Common questions
What is Mark Kenneth Detweiler, M.D.'s NPI number?
Mark Kenneth Detweiler, M.D.'s National Provider Identifier (NPI) is 1548344583, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Kenneth Detweiler, M.D. located?
The NPPES record lists a practice address at 1B Commons Dr, Londonderry, NH, 03053. Phone: (603) 818-4712. Providers update this record themselves, so call before visiting.
How can I verify Mark Kenneth Detweiler, M.D.'s license?
NPPES lists New Hampshire license number 6919, as entered by the provider. Search the New Hampshire board that licenses this profession; the NPPES record confirms identity only.
How much does Mark Kenneth Detweiler, M.D. prescribe under Medicare Part D?
In 2024, Mark Kenneth Detweiler, M.D. had 128 Medicare Part D claims for 28 beneficiaries; the average among specialist prescribers was 1,380. 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.