Brian L. Gretta, M.D.
Emergency Medicine Physician · Derry, NH
Brian L. Gretta, M.D. is an emergency medicine physician with a practice address in Derry, New Hampshire, and NPI 1659356384, issued on Dec 15, 2005. Check the license on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Brian L. Gretta
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- MD13084 ME
62698 GA
205530 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Parkland Dr, Derry, NH 03038
- Phone
- (207) 794-3321
- Enumerated
- Dec 15, 2005
- Record last updated
- Jul 31, 2026
- Medicare enrollment
- Enrolled (PECOS I20241009001697); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 351 in New Hampshire → Look up another NPI →
Also registered at 1 Parkland Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alaa Azzouqa, M.D.Hospitalist Physician1386195469
- Summer Bell, APRNFamily Nurse Practitioner1154031292
- Alexis Boyatsis, PA-CPhysician Assistant1376986935
- David Bryson, PA-CMedical Physician Assistant1043236011
- Kyle Cahill, OTR/LOccupational Therapist1720612054
- Daanish Chippa, M.D.Internal Medicine Physician1316324163
Verify Brian L. Gretta 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
21% more Medicare Part D claims than the average emergency medicine physician in 2024
273 Medicare Part D claims for 158 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 50 claims were for opioids.
Most prescribed
- Ondansetron Odt31 claims
- Tramadol Hcl24 claims
- Methylprednisolone18 claims
- Oxycodone-Acetaminophen18 claims
- Azithromycin15 claims
- Prednisone15 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.
Bills Medicare through one group practice
- Emergency Medicine Services OF NH, LLCDerry, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brian L. Gretta among 351 emergency medicine physician records in New Hampshire
Brian L. Gretta, M.D. is one of 351 emergency medicine physician records with a practice address in New Hampshire. 76% 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, 97% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1986 · median 2011 among the 205 with a school on file
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in New Hampshire
There are 351 emergency medicine physician records in New Hampshire.
All 351 in New Hampshire → Every provider in Derry → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Maria Diaz, M.D.Derry, NH 030381013142959
- Marc Grossman, MDDerry, NH 030381598799025
- Da Le, MDDerry, NH 030381477578623
- Amy Margolis, DODerry, NH 030381295760841
- Thomas Scott, DODerry, NH 030381184643546
- Henry Wagner, MDDerry, NH 030381184643587
- Mark Feldman, M.D.Hudson, NH 030511700115250
- Joseph Cardeiro, M.D.Nashua, NH 030601659470714
Common questions
What is Brian L. Gretta, M.D.'s NPI number?
Brian L. Gretta, M.D.'s National Provider Identifier (NPI) is 1659356384, issued on Dec 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Brian L. Gretta, M.D. located?
The NPPES record lists a practice address at 1 Parkland Dr, Derry, NH, 03038. Phone: (207) 794-3321. Providers update this record themselves, so call before visiting.
How can I verify Brian L. Gretta, M.D.'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 Brian L. Gretta, M.D. prescribe under Medicare Part D?
In 2024, Brian L. Gretta, M.D. had 273 Medicare Part D claims for 158 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.