John A. Hamjian, M.D.
Neurology Physician · Hyannis, MA
John A. Hamjian, M.D. is a neurology physician with a practice address in Hyannis, Massachusetts, and NPI 1124120613, issued on Sep 4, 2006. Check the license (Massachusetts 80980, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John A. Hamjian
- Credential
- M.D.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- 80980 MA
Self-reported in NPPES; status is on the state search - Practice location
- 2 Lynxholm CT, Hyannis, MA 02601
- Phone
- (508) 778-8585
- Enumerated
- Sep 4, 2006
- Record last updated
- Jan 31, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (508) 775-2951
- Medicaid ID
- 3141993 MA
- Medicare enrollment
- Enrolled (PECOS I20050601000131); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1987
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 964 in Massachusetts → Look up another NPI →
Verify John A. Hamjian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 80980Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% more Medicare Part D claims than the average neurology physician in 2024
2,129 Medicare Part D claims for 351 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Gabapentin312 claims
- Donepezil Hcl184 claims
- Carbidopa-Levodopa163 claims
- Memantine Hcl115 claims
- Topiramate102 claims
- Ropinirole Hcl97 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 MIPS final score for 2023 (Medicare payment program): 0 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
John A. Hamjian among 964 neurology physician records in Massachusetts
John A. Hamjian, M.D. is one of 964 neurology physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 57% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1987 · median 2006 among the 612 with a school on file
- Record last updated2008 · 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 2084N0400X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in Massachusetts
There are 964 neurology physician records in Massachusetts.
All 964 in Massachusetts → Every provider in Hyannis → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Lisa Ferley, MDHyannis, MA 026011699733469
- Michael Markowski, D.O.Hyannis, MA 026011295774057
- James McCarthy, MDHyannis, MA 026011245337963
- Michael Leahy, M.D.North Falmouth, MA 025561720050073
- Megan Callahan, M.D.Attleboro, MA 027031780642611
- Tzu-Ying Chuang, MD, PHDAttleboro, MA 027031477040558
- Ranbir Dhillon, M.D.Attleboro, MA 027031124090691
- Tracey Garcia, M.D.Needham, MA 024921598920332
Common questions
What is John A. Hamjian, M.D.'s NPI number?
John A. Hamjian, M.D.'s National Provider Identifier (NPI) is 1124120613, issued on Sep 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John A. Hamjian, M.D. located?
The NPPES record lists a practice address at 2 Lynxholm CT, Hyannis, MA, 02601. Phone: (508) 778-8585. Providers update this record themselves, so call before visiting.
How can I verify John A. Hamjian, M.D.'s license?
NPPES lists Massachusetts license number 80980, 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 John A. Hamjian, M.D. prescribe under Medicare Part D?
In 2024, John A. Hamjian, M.D. had 2,129 Medicare Part D claims for 351 beneficiaries; the average among neurology physician prescribers was 1,370. Part D covers Medicare prescriptions only.
What is John A. Hamjian, M.D.'s MIPS final score?
The 2023 MIPS final score is 0 of 100. 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.