John Nicasio, DO
Endocrinology, Diabetes & Metabolism Physician · Northampton, MA
John Nicasio, DO is an endocrinology, diabetes & metabolism physician with a practice address in Northampton, Massachusetts, and NPI 1982803003, issued on Jul 18, 2007. Check the license (Massachusetts 234897, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John Nicasio
- Credential
- DO
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 234897 MA
Self-reported in NPPES; status is on the state search - Practice location
- 22 Atwood Dr, Northampton, MA 01060
- Phone
- (413) 582-4728
- Enumerated
- Jul 18, 2007
- Record last updated
- Mar 15, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (413) 923-9318
- Medicaid ID
- 2150697 MA
- Medicare enrollment
- Enrolled (PECOS I20080726000022); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 522 in Massachusetts → Look up another NPI →
Also registered at 22 Atwood Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jessica Dawicki, RDRegistered Dietitian1265045421
- Peter Elsea, MDInternal Medicine Physician1699731182
- Eric Granowitz, MDInfectious Disease Physician1801855242
- Peter Halperin, MDPsychiatry Physician1992736482
- Dhruv Jani, DOGeriatric Medicine (Family Medicine) Physician1891355293
Verify John Nicasio in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 234897Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
3,638 Medicare Part D claims for 510 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.
Most prescribed
- Alendronate Sodium375 claims
- Levothyroxine Sodium360 claims
- Pioglitazone Hcl237 claims
- Jardiance216 claims
- Trulicity216 claims
- Metformin Hcl Er205 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: $158.44
6 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
- Mass General Brigham Medical Group Western Massachusetts IncNorthampton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Nicasio among 522 endocrinology, diabetes & metabolism physician records in Massachusetts
John Nicasio, DO is one of 522 endocrinology, diabetes & metabolism physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 40% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2000 · median 2002 among the 378 with a school on file
- Record last updated2018 · 60% 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 Massachusetts 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 Massachusetts
There are 522 endocrinology, diabetes & metabolism physician records in Massachusetts.
All 522 in Massachusetts → Every provider in Northampton → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Vilma Carlone, MDNorthampton, MA 010601962459339
- Mary Roy, MDNorthampton, MA 010601295702967
- Peter Butler, M.D.Florence, MA 010621871708990
- Alice Abbott, MDLeeds, MA 010531922096205
- Jorge Silva, M.D.Southwick, MA 010771013978030
- Robert Cooper, M.D.Holyoke, MA 010401992739726
- Aysha Khan, MDHolyoke, MA 010401669034187
- Thomas Gartman, M.D.Chicopee, MA 010201861455958
Common questions
What is John Nicasio, DO's NPI number?
John Nicasio, DO's National Provider Identifier (NPI) is 1982803003, issued on Jul 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Nicasio, DO located?
The NPPES record lists a practice address at 22 Atwood Dr, Northampton, MA, 01060. Phone: (413) 582-4728. Providers update this record themselves, so call before visiting.
How can I verify John Nicasio, DO's license?
NPPES lists Massachusetts license number 234897, 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 Nicasio, DO prescribe under Medicare Part D?
In 2024, John Nicasio, DO had 3,638 Medicare Part D claims for 510 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.