Michael G. Bertos, M.D.
Internal Medicine Physician · N Chelmsford, MA
Michael G. Bertos, M.D. is an internal medicine physician with a practice address in N Chelmsford, Massachusetts, and NPI 1043245145, issued on Jul 11, 2006. Check the license (Massachusetts 160611, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Michael G. Bertos
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 160611 MA
Self-reported in NPPES; status is on the state search - Practice location
- 20 Research PL, N Chelmsford, MA 01863
- Phone
- (978) 459-2152
- Enumerated
- Jul 11, 2006
- Record last updated
- Nov 2, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20120112000019); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 20 Research PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Judith Bain, NPFamily Nurse Practitioner1609952035
- Louis Bresnick, M.D.Internal Medicine Physician1205861390
- Jayme Cerullo, NPFamily Nurse Practitioner1689711871
- Kathleen Cullen-Lutter, RN/NMAdvanced Practice Midwife1588096267
- Minerva Domingo, MDSpecialist1639170210
- Roula Johnstone, ACNP-BCAcute Care Nurse Practitioner1598907271
Verify Michael G. Bertos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 160611Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10.2 times the Medicare Part D claims of the average internal medicine physician in 2024
32,526 Medicare Part D claims for 1,466 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 358 claims were for opioids.
Most prescribed
- Atorvastatin Calcium1,605 claims
- Levothyroxine Sodium1,030 claims
- Furosemide956 claims
- Amlodipine Besylate897 claims
- Eliquis887 claims
- Trazodone Hcl703 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: $16.88
1 payment: food and beverage; the largest payer was Inspire Medical Systems, 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
- Lgh Professional Services LLCNorth Chelmsford, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael G. Bertos among 6,825 internal medicine physician records in Massachusetts
Michael G. Bertos, M.D. 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 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1997 · 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).
3 internal medicine physician records list a practice address in N Chelmsford
They are 3 of the 66 NPPES records with a practice address in N Chelmsford, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in N Chelmsford → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Louis Bresnick, M.D.N Chelmsford, MA 018631205861390
- Jacqueline Chu, MDNorth Chelmsford, MA 018631619359858
- Joshua GoldbergNorth Chelmsford, MA 018631699320432
- Philip Tavano, M.D.N Chelmsford, MA 018631710919238
- Caitlin Waters, MDNorth Chelmsford, MA 018631841600178
- Jessica Wieselquist, MDNorth Chelmsford, MA 018631144255712
- Timothy Wymer, M.D.North Chelmsford, MA 018631376937268
- Tatiana Bernde Aime Noel, MDN Billerica, MA 018621588061964
Common questions
What is Michael G. Bertos, M.D.'s NPI number?
Michael G. Bertos, M.D.'s National Provider Identifier (NPI) is 1043245145, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael G. Bertos, M.D. located?
The NPPES record lists a practice address at 20 Research PL, N Chelmsford, MA, 01863. Phone: (978) 459-2152. Providers update this record themselves, so call before visiting.
How can I verify Michael G. Bertos, M.D.'s license?
NPPES lists Massachusetts license number 160611, 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 Michael G. Bertos, M.D. prescribe under Medicare Part D?
In 2024, Michael G. Bertos, M.D. had 32,526 Medicare Part D claims for 1,466 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.