Christopher Alonzo, M.D., MPH
NPI 1265812226 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Alonzo, M.D., MPH is a Internal Medicine Physician provider in Boston, MA (NPI 1265812226).
Provider details
- NPI number
- 1265812226
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., MPH
- Sex
- Male
- Sole proprietor
- Yes
- License
- 277140 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
625 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 109 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 61 | $90 |
| Hemoglobin A1c Level83036 | 60 | $10 |
| Creatinine Level to Test for Kidney Function Or Muscle Injury82570 | 53 | $5 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 52 | $13 |
| Urine Microalbumin (protein) Level82043 | 50 | $6 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 174 | 58 |
| Amlodipine Besylate | 115 | 37 |
| Lisinopril | 72 | 23 |
| Tamsulosin Hcl | 52 | 14 |
| Metformin Hcl | 50 | 15 |
| Omeprazole | 47 | 17 |
| Metformin Hcl |
Practice location
Mailing address
Additional practice locations (1)
- 1340 Boylston StBoston, MA 02215Phone: (617) 267-0900
Registry dates
- Enumerated
- 2015-06-04
- Last updated
- 2018-10-15
Frequently asked questions
- What is Christopher Alonzo's NPI number?
- Christopher Alonzo's National Provider Identifier (NPI) is 1265812226, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Alonzo's specialty?
- Christopher Alonzo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Alonzo located?
- Christopher Alonzo's practice location on file with NPPES is 1340 Boylston St, Boston, MA 02215.
- What is Christopher Alonzo's phone number?
- The practice phone number listed in the NPPES registry for Christopher Alonzo is (617) 267-0900.
- Does Christopher Alonzo accept Medicare?
- Christopher Alonzo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Alonzo's NPI active?
- Yes — Christopher Alonzo's NPI (1265812226) is active in the NPPES registry as of the last update on 2018-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.