Karl Santiago, MD
NPI 1033641287 · Pediatrics Physician · Boston, MA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karl Santiago, MD is a Pediatrics Physician provider in Boston, MA (NPI 1033641287).
Provider details
- NPI number
- 1033641287
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD24103 (ME)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
4 documented practice locations
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.
Practice location
Mailing address
Additional practice locations (3)
- 75 Bickford StJamaica Plain, MA 02130-1401Phone: (617) 971-2100
- 9 Fahy StBelfast, ME 04915-6028Phone: (207) 505-3600Fax: (207) 553-8364
- 15 Anchor Dr Ste 103Rockport, ME 04856-3847Phone: (207) 301-5600Fax: (207) 301-5360
Registry dates
- Enumerated
- 2017-03-28
- Last updated
- 2025-05-12
- Certified
- 2025-05-12
Frequently asked questions
- What is Karl Santiago's NPI number?
- Karl Santiago's National Provider Identifier (NPI) is 1033641287, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl Santiago's specialty?
- Karl Santiago is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Karl Santiago located?
- Karl Santiago's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Karl Santiago's phone number?
- The practice phone number listed in the NPPES registry for Karl Santiago is (617) 355-6000.
- Does Karl Santiago accept Medicare?
- Karl Santiago is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karl Santiago's NPI active?
- Yes — Karl Santiago's NPI (1033641287) is active in the NPPES registry as of the last update on 2025-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.