Joseph Marcel-Saint-Louis Demertine, M.D.
NPI 1427007822 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Marcel-Saint-Louis Demertine, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1427007822).
Provider details
- NPI number
- 1427007822
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 76898 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
- Family Medicine Physician207Q00000X
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ibuprofen | 25 | 24 |
| Clotrimazole/Betamethasone Dipbrand: Clotrimazole-Betamethasone | 24 | — |
| Lisinopril | 17 | — |
| Atorvastatin Calcium | 16 | — |
| Metformin Hcl | 14 | — |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 13 | 13 |
| Ciprofloxacin Hcl | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-10
- Last updated
- 2017-02-22
Frequently asked questions
- What is Joseph Marcel-Saint-Louis Demertine's NPI number?
- Joseph Marcel-Saint-Louis Demertine's National Provider Identifier (NPI) is 1427007822, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Marcel-Saint-Louis Demertine's specialty?
- Joseph Marcel-Saint-Louis Demertine is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Marcel-Saint-Louis Demertine located?
- Joseph Marcel-Saint-Louis Demertine's practice location on file with NPPES is 581 Boylston St, Boston, MA 02116-3608.
- What is Joseph Marcel-Saint-Louis Demertine's phone number?
- The practice phone number listed in the NPPES registry for Joseph Marcel-Saint-Louis Demertine is (617) 247-1400.
- Does Joseph Marcel-Saint-Louis Demertine accept Medicare?
- Joseph Marcel-Saint-Louis Demertine is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Marcel-Saint-Louis Demertine's NPI active?
- Yes — Joseph Marcel-Saint-Louis Demertine's NPI (1427007822) is active in the NPPES registry as of the last update on 2017-02-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.