1. Home
  2. Directory
  3. Maine
  4. Brunswick
  5. Pediatrics
  6. NPI Profile

DR. GILLIAN BRESLIN GRIJALVA M.D.
NPI 1649408824
Pediatrics in Brunswick, ME

Active since June 26, 2009PECOS Enrolled
74 BARIBEAU DR, BRUNSWICK, ME 04011(207) 798-4050(207) 798-4018 Get Directions Write a Review

NPPES record last updated: September 15, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 15, 2020, Jul 8, 2020 (2 updates tracked since 2020).

About Dr. Gillian Breslin Grijalva M.d. NPPES

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

DR. GILLIAN BRESLIN GRIJALVA M.D. (NPI 1649408824) is an individual pediatrics provider in Brunswick, Maine, licensed in Maine (MD23707) and active in the NPI registry since June 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649408824
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. GILLIAN BRESLIN GRIJALVACredential: M.D.
Location Address74 BARIBEAU DRBrunswick, ME 04011-3218
Mailing AddressPo Box 9746Portland, ME 04104-5040
Phone(207) 798-4050
Fax(207) 798-4018
Sole ProprietorNo
Enumeration DateJune 26, 2009
Last NPPES UpdateSeptember 15, 20202 updates tracked since enumeration
NPPES CertifiedSeptember 15, 2020
✔ NPI 1649408824 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
Licenses✔ Licensed in ME · MD23707✔ Licensed in MA · 252563✔ Licensed in NY · 276241
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.
74 BARIBEAU DR, Brunswick, ME 04011
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Premera Blue Cross Blue Shield of Alaska.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. Gillian Breslin Grijalva M.d. 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 Reassignments

3

Medicare enrollment records show Gillian Grijalva reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Martin's Point Health Care, Inc.
20 mi
Family Medicine
331 VERANDA ST
Portland, ME 04104
  • Reassigned Medicare billing, Maine enrollment
  • 153 clinicians in this Medicare group
NPI 1366474611 (207) 791-3888
Multicare Health System
2,261 mi
Internal Medicine
15533 E BROADWAY AVE
Spokane Valley, WA 99037
  • Reassigned Medicare billing, Washington enrollment
  • 4,383 clinicians in this Medicare group
NPI 1336902345 (509) 530-4260
Seattle Children's Hospital
2,493 mi
Specialist
4800 SAND POINT WAY NE
Seattle, WA 98105
  • Reassigned Medicare billing, Washington enrollment
  • Medicare enrollment name: Seattle Childrens Hospital
  • 912 clinicians in this Medicare group
NPI 1003319500 (206) 987-2000

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 04011 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
$86.72 typical visit price
range $56.28 – $169.96
Typical copayment $21.68 (range $14.07 – $42.49)
Most-billed visit code 99203
Established Patient
$99.18 typical visit price
range $18.22 – $138.92
Typical copayment $24.79 (range $4.55 – $34.73)
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 16

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

DAHLIA PEASE
Pediatrics
74 BARIBEAU DR
BRUNSWICK, ME 04011
Cumberland County (207) 798-4050
MATTHEW TYCZ MSPT
Physical Therapist
74 BARIBEAU DR
BRUNSWICK, ME 04011
Cumberland County (207) 798-4050
SARAH MUIR KENNEDY NP
Nurse Practitioner
74 BARIBEAU DR
BRUNSWICK, ME 04011
Cumberland County (207) 798-4050
DR. MICHAEL A BERGERON MD
Family Medicine
74 BARIBEAU DR
BRUNSWICK, ME 04011
Cumberland County (207) 777-4111
DANIEL MORGENSTERN MD
Internal Medicine
74 BARIBEAU DR
BRUNSWICK, ME 04011
Cumberland County (207) 798-4050
JUDITH CHAMBERLAIN MD
Family Medicine
74 BARIBEAU DR
BRUNSWICK, ME 04011
Cumberland County (207) 798-4050
MARK WORTHING MD
Family Medicine
74 BARIBEAU DR
BRUNSWICK, ME 04011
Cumberland County (207) 798-4050
ANDREA LOEFFLER MD
Pediatrics
74 BARIBEAU DR
BRUNSWICK, ME 04011
Cumberland County (207) 798-4050

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 Gillian Grijalva's NPI number?

The NPI number for Gillian Grijalva is 1649408824. It was assigned to this individual provider in the NPPES registry on June 26, 2009.

Where is Gillian Grijalva located?

Gillian Grijalva practices at 74 Baribeau Dr, Brunswick, ME 04011. The listed phone number is (207) 798-4050.

What is Gillian Grijalva's specialty?

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

Is Gillian Grijalva enrolled in Medicare?

Yes. Gillian Grijalva is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gillian Grijalva's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gillian Grijalva reassigns Medicare benefits to 3 organizations: Martin's Point Health Care, Inc. (Portland, ME), Multicare Health System (Spokane Valley, WA) and Seattle Children's Hospital (Seattle, WA). Each 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 Gillian Grijalva's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gillian Grijalva accept?

Health plans from Ambetter Health and Premera Blue Cross Blue Shield of Alaska list Gillian Grijalva 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 Gillian Grijalva was last updated on September 15, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.