Amy R. Lo, M.D.
Internal Medicine Physician · Acton, MA
Amy R. Lo, M.D. is an internal medicine physician with a practice address in Acton, Massachusetts, and NPI 1174783526, issued on Jun 10, 2008. Check the license (Massachusetts 247460, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Amy R. Lo
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 247460 MA
Self-reported in NPPES; status is on the state search - Practice location
- 321 Main St, Acton, MA 01720
- Phone
- (978) 635-8700
- Enumerated
- Jun 10, 2008
- Record last updated
- Sep 27, 2023
- Fax
- (978) 635-8921
- Medicare enrollment
- Enrolled (PECOS I20110816000022); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 2007
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 321 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christopher Bechtel, NPNurse Practitioner1144578626
- Meryl BergerNurse Practitioner1922600220
- Louis Berk, M.D.Family Medicine Physician1730501875
- Elizabeth Berman, RDN, LDNRegistered Dietitian1679949143
- Christine Brown, M.D.Internal Medicine Physician1588861660
- Samuel BrownClinical Social Worker1336576065
Verify Amy R. Lo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 247460Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,244 Medicare Part D claims for 272 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 44 claims were for opioids.
Most prescribed
- Atorvastatin Calcium105 claims
- Lisinopril59 claims
- Levothyroxine Sodium50 claims
- Losartan Potassium48 claims
- Omeprazole45 claims
- Amlodipine Besylate39 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.
Bills Medicare through one group practice
- Acton Medical Associates PCActon, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Amy R. Lo among 6,825 internal medicine physician records in Massachusetts
Amy R. Lo, 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 2008, is newer than 55% of them.
- NPI issued2008 · 55% of these records are older, 40% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2007 · median 2004 among the 4,103 with a school on file
- Record last updated2023 · 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).
17 internal medicine physician records list a practice address in Acton
They are 17 of the 556 NPPES records with a practice address in Acton, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Acton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Christine Brown, M.D.Acton, MA 017201588861660
- Amy Churchill, MDActon, MA 017201033171749
- Peter Demartino, M.D.Acton, MA 017201043292360
- Allessandro Girolamo, M.D.Acton, MA 017201689636300
- Ingrid Gorman, M.D.Acton, MA 017201053302158
- Edwin Knights, MDActon, MA 017201801885512
- Deborah Kovacs, MDActon, MA 017201386634772
- Teli Leung-Galecki, M.D.Acton, MA 017201043363088
Common questions
What is Amy R. Lo, M.D.'s NPI number?
Amy R. Lo, M.D.'s National Provider Identifier (NPI) is 1174783526, issued on Jun 10, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Amy R. Lo, M.D. located?
The NPPES record lists a practice address at 321 Main St, Acton, MA, 01720. Phone: (978) 635-8700. Providers update this record themselves, so call before visiting.
How can I verify Amy R. Lo, M.D.'s license?
NPPES lists Massachusetts license number 247460, 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 Amy R. Lo, M.D. prescribe under Medicare Part D?
In 2024, Amy R. Lo, M.D. had 1,244 Medicare Part D claims for 272 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.