John A. Poremba, M.D.
Endocrinology, Diabetes & Metabolism Physician · Nashua, NH
John A. Poremba, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Nashua, New Hampshire, and NPI 1104829506, issued on May 31, 2005. Check the license (New Hampshire 13776, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- John A. Poremba
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 13776 NH
MD051524L PA
Self-reported in NPPES; status is on the state search - Practice location
- 17 Riverside St Ste 202, Nashua, NH 03062
- Phone
- (603) 577-5760
- Enumerated
- May 31, 2005
- Record last updated
- Feb 21, 2023
- Fax
- (603) 577-5765
- Medicare enrollment
- Enrolled (PECOS I20080926000286); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 65 in New Hampshire → Look up another NPI →
Also registered at 17 Riverside St Ste 202
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Simona Ioja, M.D.Endocrinology, Diabetes & Metabolism Physician1265662621
- Paul Labinson, D.O.Endocrinology, Diabetes & Metabolism Physician1295782548
- Susan Morris, RDRegistered Dietitian1215116793
- Brian Murphy, FNP-BCFamily Nurse Practitioner1952018210
- Linda Sheldon, M.D.Internal Medicine Physician1275519910
- Brett Wayne, MDA, RDRegistered Dietitian1427846781
Verify John A. Poremba in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 13776Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,937 Medicare Part D claims for 496 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 48% of claims.
Most prescribed
- Levothyroxine Sodium299 claims
- Metformin Hcl208 claims
- Lantus Solostar153 claims
- Ozempic134 claims
- Metformin Hcl Er120 claims
- Jardiance105 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: $127.32
2 payments; by number, the most common kind was food and beverage; the largest payer was Dexcom, Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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.
Bills Medicare through one group practice
- Foundation Medical Partners IncNashua, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John A. Poremba among 65 endocrinology, diabetes & metabolism physician records in New Hampshire
John A. Poremba, M.D. is one of 65 endocrinology, diabetes & metabolism physician records with a practice address in New Hampshire. 72% 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, 94% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1991 · median 2004 among the 40 with a school on file
- Record last updated2023 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in New Hampshire
There are 65 endocrinology, diabetes & metabolism physician records in New Hampshire.
All 65 in New Hampshire → Every provider in Nashua → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Simona Ioja, M.D.Nashua, NH 030621265662621
- Paul Labinson, D.O.Nashua, NH 030621295782548
- Nikita Mohan, MDNashua, NH 030621649944695
- Ellie Chuang, MDNashua, NH 030631336248921
- Nancy Nyberg-Lake, ARNPNashua, NH 030631700845534
- Margaret Flynn, MDNashua, NH 030601821094491
- Robert Levine, M.D., FACENashua, NH 030601821058009
- Richard Licata, M.D.Nashua, NH 030601124085998
Common questions
What is John A. Poremba, M.D.'s NPI number?
John A. Poremba, M.D.'s National Provider Identifier (NPI) is 1104829506, issued on May 31, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John A. Poremba, M.D. located?
The NPPES record lists a practice address at 17 Riverside St Ste 202, Nashua, NH, 03062. Phone: (603) 577-5760. Providers update this record themselves, so call before visiting.
How can I verify John A. Poremba, M.D.'s license?
NPPES lists New Hampshire license number 13776, 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 John A. Poremba, M.D. prescribe under Medicare Part D?
In 2024, John A. Poremba, M.D. had 2,937 Medicare Part D claims for 496 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.