Rosemary C. Janas, FNP
Internal Medicine Physician · Tewksbury, MA
Rosemary C. Janas, FNP is an internal medicine physician with a practice address in Tewksbury, Massachusetts, and NPI 1104978980, issued on Jan 18, 2007. Check the license (Massachusetts 155482, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Rosemary C. Janas
- Credential
- FNP
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 155482 MA
Self-reported in NPPES; status is on the state search - Practice location
- 600 Clark RD, Tewksbury, MA 01876
- Phone
- (978) 453-8261
- Enumerated
- Jan 18, 2007
- Record last updated
- Feb 15, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040722000222); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 600 Clark RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexa Aboshar, PA-CPhysician Assistant1245623578
- Laurie Botie, MDFamily Medicine Physician1639293558
- Leah CalderazzoPhysical Therapist1508584392
- Cindy Cheng, M.D.Internal Medicine Physician1114989613
- Tara Coyne, NPFamily Nurse Practitioner1184972333
- Lisa DiburroFamily Nurse Practitioner1821514274
Verify Rosemary C. Janas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 155482Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average internal medicine physician in 2024
3,249 Medicare Part D claims for 327 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 144 claims were for opioids.
Most prescribed
- Atorvastatin Calcium239 claims
- Metoprolol Succinate174 claims
- Lisinopril151 claims
- Simvastatin135 claims
- Lorazepam113 claims
- Alprazolam110 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: $1,688.34
77 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Global Care Medical Group PCLowell, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rosemary C. Janas among 6,825 internal medicine physician records in Massachusetts
Rosemary C. Janas, FNP is one of 6,825 internal medicine 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 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1984 · median 2004 among the 4,103 with a school on file
- Record last updated2011 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 internal medicine physician records list a practice address in Tewksbury
They are 8 of the 423 NPPES records with a practice address in Tewksbury, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Tewksbury → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Diana Arena, D.O.Tewksbury, MA 018761609986074
- Cindy Cheng, M.D.Tewksbury, MA 018761114989613
- Shirish Desai, M.D.Tewksbury, MA 018761467488601
- Paul Geraldez, M.D.Tewksbury, MA 018761457342958
- James Kuin, M.D.Tewksbury, MA 018761972564995
- Michael O'Connell, M.D.Tewksbury, MA 018761174543862
- Kali Scott, DVMTewksbury, MA 018761316629991
- Davis Bu, M.D.Wakefield, MA 018801154303550
Common questions
What is Rosemary C. Janas, FNP's NPI number?
Rosemary C. Janas, FNP's National Provider Identifier (NPI) is 1104978980, issued on Jan 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Rosemary C. Janas, FNP located?
The NPPES record lists a practice address at 600 Clark RD, Tewksbury, MA, 01876. Phone: (978) 453-8261. Providers update this record themselves, so call before visiting.
How can I verify Rosemary C. Janas, FNP's license?
NPPES lists Massachusetts license number 155482, 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 Rosemary C. Janas, FNP prescribe under Medicare Part D?
In 2024, Rosemary C. Janas, FNP had 3,249 Medicare Part D claims for 327 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.