1. Home
  2. Directory
  3. Massachusetts
  4. Boston
  5. Pediatrics
  6. NPI Profile

DR. PHOEBE HILDRETH YAGER MD
NPI 1104927623
Pediatrics in Boston, MA

Active since September 26, 2006PECOS Enrolled
175 CAMBRIDGE STREET, CPZS-5, BOSTON, MA 02114(617) 724-4380(617) 724-4391 Get Directions Write a Review

NPPES record last updated: November 24, 2008. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Phoebe Hildreth Yager Md NPPES

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

DR. PHOEBE HILDRETH YAGER MD (NPI 1104927623) is an individual pediatrics provider in Boston, Massachusetts, licensed in Massachusetts (216176) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1104927623
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. PHOEBE HILDRETH YAGERCredential: MD
Location Address175 CAMBRIDGE STREET, CPZS-5Boston, MA 02114-2696
Mailing AddressPo Box 9142, Mass General Physician OrganizationCharlestown, MA 02129-9142 · (617) 724-0287 · Fax (617) 726-2894
Phone(617) 724-4380
Fax(617) 724-4391
Sole ProprietorNo
Enumeration DateSeptember 26, 2006
Last NPPES UpdateNovember 24, 2008
✔ NPI 1104927623 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in MA · 216176
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.
Also ListedPediatrics · Pediatric Critical Care MedicineTaxonomy 2080P0203X · License 216176 (MA)
175 CAMBRIDGE STREET, Boston, MA 02114
Open in Google Maps ↗

Other Identifiers 5

Other216176MA · Tufts Health Plan
OtherJ26342MA · Bcbs Ma
Medicare UPINH89600
Medicaid2012316MA
Medicare ID-Type UnspecifiedA35720MA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AmeriHealth Caritas Next, Taro Health.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. Phoebe Hildreth Yager 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 Reassignments

3

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

The Shriners' Hospital For Children
0.1 mi
Pediatric Surgery
51 BLOSSOM ST
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 128 clinicians in this Medicare group
NPI 1366886525 (617) 371-2300
The General Hospital Corporation
0.2 mi
General Acute Care Hospital
55 FRUIT ST, BULFINCH 360
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,234 clinicians in this Medicare group
NPI 1023049236 (617) 726-2000
Massachusetts General Physicians Organization Inc
0.2 mi
Dermatology
55 FRUIT ST, BUL 2
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,360 clinicians in this Medicare group
NPI 1801874573 (617) 724-0287

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 02114 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 3

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

DR. JAMES E. ZACHAZEWSKI PT, DPT, ATC, SCS
Specialist/Technologist (Athletic Trainer)
175 CAMBRIDGE STREET, SUIITE 470
BOSTON, MA 02114
Suffolk County (617) 643-1230
DENISE E RICHARDS FNP
Nurse Practitioner (Family)
175 CAMBRIDGE STREET, 5TH FLOOR MGH PEDIATRIC ENDOCRINE ASSOCIATES
BOSTON, MA 02114
Suffolk County (617) 726-2909
DR. DONGHOON DEREK SHIN MD
Radiology (Diagnostic Radiology)
175 CAMBRIDGE STREET
BOSTON, MA 02114
Suffolk County (617) 643-2009

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 Phoebe Yager's NPI number?

The NPI number for Phoebe Yager is 1104927623. It was assigned to this individual provider in the NPPES registry on September 26, 2006.

Where is Phoebe Yager located?

Phoebe Yager practices at 175 Cambridge Street Cpzs-5, Boston, MA 02114. The listed phone number is (617) 724-4380.

What is Phoebe Yager's specialty?

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

Is Phoebe Yager enrolled in Medicare?

Yes. Phoebe Yager is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Phoebe Yager's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Phoebe Yager reassigns Medicare benefits to 3 organizations: The Shriners' Hospital For Children (Boston, MA), The General Hospital Corporation (Boston, MA) and Massachusetts General Physicians Organization Inc (Boston, MA). 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 Phoebe Yager's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Phoebe Yager accept?

Health plans from AmeriHealth Caritas Next and Taro Health list Phoebe Yager 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 Phoebe Yager was last updated on November 24, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.