Stephen Loosigian, DO
Critical Care Medicine (Internal Medicine) Physician · Manchester, NH
Stephen Loosigian, DO is a critical care medicine (internal medicine) physician with a practice address in Manchester, New Hampshire, and NPI 1477522753, issued on Mar 17, 2006. Check the license on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Stephen Loosigian
- Credential
- DO
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- Practice location
- 1 Elliot Way, Manchester, NH 03103
- Phone
- (603) 663-2271
- Enumerated
- Mar 17, 2006
- Entity
- Type 1 · individual
Also registered at 1 Elliot Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bryan AjaStudent in an Organized Health Care Education/Training Program1194184580
- Bridget Alcorn, NPAdult Health Nurse Practitioner1457300352
- Jaime Altabet, M.D.Student in an Organized Health Care Education/Training Program1760820609
- Nicholas AngeloneFamily Nurse Practitioner1124850680
- David Arend, MDAnesthesiology Physician1639133119
- Paul Arnstein, ARNPNurse Practitioner1184686131
Verify Stephen Loosigian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of MedicineCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
90% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
108 Medicare Part D claims for 53 beneficiaries, against an average of 1,103 among the 4,049 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Prednisone14 claims
- Metoprolol Succinate11 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.
One hospital or facility affiliation
- Elliot Professional ServicesManchester, NH
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Critical Care Medicine (Internal Medicine) Physician providers in New Hampshire
There are 41 critical care medicine (internal medicine) physician records in New Hampshire.
Other critical care medicine (internal medicine) physician records in New Hampshire
- Naim Aoun, M.D.Nashua, NH1457323354
- Patricia Atchinson, DOLebanon, NH1255741369
- Christopher Brauer, MDManchester, NH1366411647
- John Brennan, MDExeter, NH1851339071
- Ryan Clouser, D.O.Manchester, NH1780650382
- Christopher Daigle, M.D.Nashua, NH1861503567
- Eliza Deery, MDLaconia, NH1801866157
- Paul Deranian, MDExeter, NH1154381374
- Dhruv Desai, M.DDover, NH1265872584
- Kevin Desrosiers, MD, MPHManchester, NH1306062054
Common questions
What is Stephen Loosigian, DO's NPI number?
Stephen Loosigian, DO's National Provider Identifier (NPI) is 1477522753, issued on Mar 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Loosigian, DO located?
The NPPES record lists a practice address at 1 Elliot Way, Manchester, NH, 03103. Phone: (603) 663-2271. Providers update this record themselves, so call before visiting.
How can I verify Stephen Loosigian, DO's license?
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 Stephen Loosigian, DO prescribe under Medicare Part D?
In 2024, Stephen Loosigian, DO had 108 Medicare Part D claims for 53 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 1,103. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.