Mark Adam Horton, MD
Pain Medicine (Anesthesiology) Physician · Keene, NH
Mark Adam Horton, MD is a pain medicine (anesthesiology) physician with a practice address in Keene, New Hampshire, and NPI 1982830725, issued on Jun 8, 2009. Check the license (New Hampshire 16586, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark Adam Horton
- Credential
- MD
- Primary taxonomy
- Pain Medicine (Anesthesiology) Physician 207LP2900X
- License number
- 16586 NH
Self-reported in NPPES; status is on the state search - Practice location
- 590 Court St, Keene, NH 03431
- Phone
- (603) 354-5400
- Enumerated
- Jun 8, 2009
- Record last updated
- Jul 24, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140821000881); accepts Medicare assignment
- Medical or professional school
- University Of Vermont College Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest pain medicine (anesthesiology) physician records → All 34 in New Hampshire → Look up another NPI →
Also registered at 590 Court St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew Anderson, M.D.Critical Care Medicine (Anesthesiology) Physician1790927168
- William Argie, PA-CMedical Physician Assistant1265519946
- Jeremy Arnold, M.D.Emergency Medicine Physician1174784557
- Payson Ayer-Dufner, PA-CPhysician Assistant1124424379
- Everett Bacon, MDEmergency Medicine Physician1669827143
- Samantha BarryFamily Nurse Practitioner1568004307
Verify Mark Adam Horton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 16586Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average pain medicine (anesthesiology) physician in 2024
378 Medicare Part D claims for 83 beneficiaries, against an average of 1,750 among the 2,982 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 92 claims were for opioids.
Most prescribed
- Gabapentin111 claims
- Pregabalin66 claims
- Meloxicam36 claims
- Tizanidine Hcl32 claims
- Oxycodone Hcl29 claims
- Duloxetine Hcl26 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 78.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
2 hospital affiliations
- Cheshire Medical CenterKeene, NH · Acute Care Hospitals4 of 5 stars
- Mary Hitchcock Memorial HospitalKeene, NH · Acute Care Hospitals3 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Mark Adam Horton among 34 pain medicine (anesthesiology) physician records in New Hampshire
Mark Adam Horton, MD is one of 34 pain medicine (anesthesiology) physician records with a practice address in New Hampshire. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 62% of them.
- NPI issued2009 · 62% of these records are older, 32% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2009 · median 2009 among the 20 with a school on file
- Record last updated2014 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207LP2900X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pain Medicine (Anesthesiology) Physician providers in New Hampshire
There are 34 pain medicine (anesthesiology) physician records in New Hampshire.
All 34 in New Hampshire → Every provider in Keene → Pain Medicine (Anesthesiology) Physician nationwide →
The 8 pain medicine (anesthesiology) physician records with the nearest ZIP codes
- Nita Grover, MDConcord, NH 033011619904901
- Robert Spencer, M.D.Concord, NH 033011477602795
- Ralph Beasley, MDLebanon, NH 037561184668667
- Corey Burchman, MDLebanon, NH 037561417934845
- Vinca Chow, M.D.Lebanon, NH 037561043575277
- Gilbert Fanciullo, MDLebanon, NH 037561275575862
- Bert Fichman, MDLebanon, NH 037561508866716
- George Lantz, DOLebanon, NH 037561972565422
Common questions
What is Mark Adam Horton, MD's NPI number?
Mark Adam Horton, MD's National Provider Identifier (NPI) is 1982830725, issued on Jun 8, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mark Adam Horton, MD located?
The NPPES record lists a practice address at 590 Court St, Keene, NH, 03431. Phone: (603) 354-5400. Providers update this record themselves, so call before visiting.
How can I verify Mark Adam Horton, MD's license?
NPPES lists New Hampshire license number 16586, 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 Mark Adam Horton, MD prescribe under Medicare Part D?
In 2024, Mark Adam Horton, MD had 378 Medicare Part D claims for 83 beneficiaries; the average among pain medicine (anesthesiology) physician prescribers was 1,750. Part D covers Medicare prescriptions only.
What is Mark Adam Horton, MD's MIPS final score?
The 2023 MIPS final score is 78.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.