Douglas Alan Horst, MD
Gastroenterology Physician · Boston, MA
Douglas Alan Horst, MD is a gastroenterology physician with a practice address in Boston, Massachusetts, and NPI 1518957224, issued on Oct 24, 2005. Check the license (Massachusetts 39297, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Douglas Alan Horst
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 39297 MA
Self-reported in NPPES; status is on the state search - Practice location
- 330 Brookline Ave, Boston, MA 02215
- Phone
- (617) 632-8623
- Enumerated
- Oct 24, 2005
- Record last updated
- Apr 14, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 1194765438 MA
- Medicare enrollment
- Enrolled (PECOS I20050628000017); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1974
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 686 in Massachusetts → Look up another NPI →
Also registered at 330 Brookline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Douglas Alan Horst in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 39297Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% fewer Medicare Part D claims than the average gastroenterology physician in 2024
724 Medicare Part D claims for 332 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. 19 claims were for opioids.
Most prescribed
- Sod Sulf-Potass Sulf-Mag Sulf218 claims
- Omeprazole45 claims
- Dicyclomine Hcl42 claims
- Mesalamine42 claims
- Pantoprazole Sodium38 claims
- Lorazepam30 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: $22.86
1 payment: food and beverage; the largest payer was Organon Llc. 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.
2 hospitals and group practices
- Nantucket Cottage HospitalNantucket, MA · Acute Care Hospitals3 of 5 stars
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncBoston, MA
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.
Douglas Alan Horst among 686 gastroenterology physician records in Massachusetts
Douglas Alan Horst, MD is one of 686 gastroenterology physician records with a practice address in Massachusetts. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1974 · median 2004 among the 491 with a school on file
- Record last updated2011 · 66% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Massachusetts
There are 686 gastroenterology physician records in Massachusetts.
All 686 in Massachusetts → Every provider in Boston → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Michael Apstein, MDBoston, MA 022151609854603
- Alphonso Brown, MDBoston, MA 022151871579987
- Valerie Byrnes, M.D.Boston, MA 022151467410332
- Catherine Cheney, M.D.Boston, MA 022151710962030
- Zalman Falchuk, MDBoston, MA 022151912996000
- Kenneth Falchuk, M.D.Boston, MA 022151639154305
- John Lamont, MDBoston, MA 022151316903735
- Anthony Lembo, M.D.Boston, MA 022151407826266
Common questions
What is Douglas Alan Horst, MD's NPI number?
Douglas Alan Horst, MD's National Provider Identifier (NPI) is 1518957224, issued on Oct 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Alan Horst, MD located?
The NPPES record lists a practice address at 330 Brookline Ave, Boston, MA, 02215. Phone: (617) 632-8623. Providers update this record themselves, so call before visiting.
How can I verify Douglas Alan Horst, MD's license?
NPPES lists Massachusetts license number 39297, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Douglas Alan Horst, MD prescribe under Medicare Part D?
In 2024, Douglas Alan Horst, MD had 724 Medicare Part D claims for 332 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.