DR. KARL CHRISTIAN SANTIAGO MD
NPI 1033641287
Pediatrics in Boston, MA

Q: What is Karl Santiago's NPI number?

The NPI number for Karl Santiago is 1033641287. It was assigned to this individual provider in the NPPES registry on March 28, 2017.

Q: What is Karl Santiago's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for Karl Santiago was last updated on May 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 28, 2017PECOS Enrolled

300 LONGWOOD AVE, BOSTON, MA 02115(617) 355-6000 Get Directions Write a Review

NPPES record last updated: May 12, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 12, 2025, Feb 11, 2025, Jan 7, 2025 and 3 more (6 updates tracked since 2017).

On this page

About Dr. Karl Christian Santiago Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. KARL CHRISTIAN SANTIAGO MD (NPI 1033641287) is an individual pediatrics provider in Boston, Massachusetts, licensed in Massachusetts (1023807) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1033641287

Entity TypeIndividualMale

Primary Taxonomy208000000X

Provider Legal NameDR. KARL CHRISTIAN SANTIAGOCredential: MD

Location Address300 LONGWOOD AVEBoston, MA 02115-5724

Mailing Address300 Longwood AveBoston, MA 02115-5724 · (617) 355-6000

Phone(617) 355-6000

Sole ProprietorNo

Enumeration DateMarch 28, 2017

Last NPPES UpdateMay 12, 20256 updates tracked since enumeration

NPPES CertifiedMay 12, 2025

✔ NPI 1033641287 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

Licenses✔ Licensed in MA · 1023807✔ Licensed in ME · MD24103

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

300 LONGWOOD AVE, Boston, MA 02115

Open in Google Maps ↗

Secondary Practice Locations 3

Location 19 Fahy StBelfast, ME 04915-6028 · Phone (207) 505-3600 · Fax (207) 553-8364

Location 215 Anchor Dr Ste 103Rockport, ME 04856-3847 · Phone (207) 301-5600 · Fax (207) 301-5360

Location 375 Bickford StJamaica Plain, MA 02130-1401 · Phone (617) 971-2100

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Karl Christian Santiago Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Karl Santiago reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Children's Hospital Pediatric Associates, Inc

Same address

Pediatrics

300 LONGWOOD AVE
Boston, MA 02115

Reassigned Medicare billing, Massachusetts enrollment
1,358 clinicians in this Medicare group

NPI 1457306664 (617) 355-6000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02115 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$97.64 typical visit price

range $63.72 – $189.86

Typical copayment $24.41 (range $15.93 – $47.46)

Most-billed visit code 99203

Established Patient

$111.18 typical visit price

range $21.07 – $155.29

Typical copayment $27.79 (range $5.26 – $38.82)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JULIE ANN HANSEN LCSW

Social Worker (Clinical)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (857) 218-4309

MS. ANNA ROGLIERI

Nurse Practitioner (Psychiatric/Mental Health)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-6000

STEPHEN G. FLYNN M.D.

Anesthesiology (Pediatric Anesthesiology)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-6000

MRS. LAUREN ASHLEY SHARIS P.T., D.P.T

Physical Therapist

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-7216

MS. SOYUN KWAN LICSW

Social Worker (Clinical)

300 LONGWOOD AVE, CHILDREN'S HOSPITAL BOSTON
BOSTON, MA 02115

Suffolk County (617) 355-0567

PUJA BANKA M.D.

Pediatrics

300 LONGWOOD AVE, BADER 203
BOSTON, MA 02115

Suffolk County (617) 355-6363

MR. COURTNEY SULLIVAN FRATTO CPNP

Nurse Practitioner (Pediatrics)

300 LONGWOOD AVE, HUNNEWELL BUILDING 322
BOSTON, MA 02115

Suffolk County (857) 218-4085

DR. ELIZABETH S TAGLAUER M.D., PH.D.

Pediatrics (Neonatal-Perinatal Medicine)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-6000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Karl Santiago's NPI number?

The NPI number for Karl Santiago is 1033641287. It was assigned to this individual provider in the NPPES registry on March 28, 2017.

Where is Karl Santiago located?

Karl Santiago practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6000.

What is Karl Santiago's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Karl Santiago enrolled in Medicare?

Yes. Karl Santiago is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Karl Santiago's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karl Santiago reassigns Medicare benefits to Children's Hospital Pediatric Associates, Inc (Boston, MA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karl Santiago's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Karl Santiago accept?

Health plans from Anthem Blue Cross and Blue Shield list Karl Santiago as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Karl Santiago was last updated on May 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.