Christopher Anthony Alonzo, M.D., MPH
Internal Medicine Physician · Boston, MA
Christopher Anthony Alonzo, M.D., MPH is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1265812226, issued on Jun 4, 2015. Check the license (Massachusetts 277140, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Christopher Anthony Alonzo
- Credential
- M.D., MPH
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 277140 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1340 Boylston St, Boston, MA 02215
- Phone
- (617) 267-0900
- Enumerated
- Jun 4, 2015
- Record last updated
- Oct 15, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20221101002749); accepts Medicare assignment
- 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 1340 Boylston St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pamela Adelstein, MDFamily Medicine Physician1306822416
- Emily Aduba, FNP-BCFamily Nurse Practitioner1831617315
- Adam Albano, M.D.Internal Medicine Physician1558689828
- Isabella Anderson, MSWSocial Worker1528701315
- Sophia AxtmanFamily Nurse Practitioner1902452022
- Joseph Baker, MD, MPHFamily Medicine Physician1144338138
Verify Christopher Anthony Alonzo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 277140Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,677 Medicare Part D claims for 178 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 30 claims were for opioids.
Most prescribed
- Atorvastatin Calcium174 claims
- Amlodipine Besylate115 claims
- Lisinopril72 claims
- Tamsulosin Hcl52 claims
- Metformin Hcl50 claims
- Omeprazole47 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
- Atrius Health IncCambridge, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christopher Anthony Alonzo among 6,825 internal medicine physician records in Massachusetts
Christopher Anthony Alonzo, M.D., MPH 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 2015, is newer than 74% of them.
- NPI issued2015 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2015 · median 2004 among the 4,103 with a school on file
- Record last updated2018 · 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).
2,320 internal medicine physician records list a practice address in Boston
They are 2,320 of the 41,865 NPPES records with a practice address in Boston, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Boston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Stephen Boswell, M.D.Boston, MA 022151477541217
- Jennifer Cluett, MDBoston, MA 022151962491183
- Jan Cook, M.D.Boston, MA 022151437152139
- Rachel Freedman, M.D.Boston, MA 022151942297189
- Joseph Gesmundo, MDBoston, MA 022151891785069
- Alex Gonzalez, MD, MPHBoston, MA 022151134101629
- Scott Harris, MDBoston, MA 022151871581694
- Joseph Li, M.D.Boston, MA 022151043209380
Common questions
What is Christopher Anthony Alonzo, M.D., MPH's NPI number?
Christopher Anthony Alonzo, M.D., MPH's National Provider Identifier (NPI) is 1265812226, issued on Jun 4, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Christopher Anthony Alonzo, M.D., MPH located?
The NPPES record lists a practice address at 1340 Boylston St, Boston, MA, 02215. Phone: (617) 267-0900. Providers update this record themselves, so call before visiting.
How can I verify Christopher Anthony Alonzo, M.D., MPH's license?
NPPES lists Massachusetts license number 277140, 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 Christopher Anthony Alonzo, M.D., MPH prescribe under Medicare Part D?
In 2024, Christopher Anthony Alonzo, M.D., MPH had 1,677 Medicare Part D claims for 178 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.