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GEOFFREY MITCHELL GUENTHER MD, MPH
NPI 1083111769
Pediatrics - Pediatric Infectious Diseases in Boston, MA

Active since April 10, 2018PECOS EnrolledAccepts Medicare Assignment
300 LONGWOOD AVE, BOSTON, MA 02115(617) 919-2900 Get Directions Write a Review

NPPES record last updated: July 15, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 15, 2021, Apr 10, 2018 (2 updates tracked since 2018).

About Geoffrey Mitchell Guenther Md, Mph NPPES

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

GEOFFREY MITCHELL GUENTHER MD, MPH (NPI 1083111769) is an individual pediatric infectious diseases provider in Boston, Massachusetts, licensed in Massachusetts (286821) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS and is a graduate of Tulane University School Of Medicine (2018).

NPPES Registry Identity

NPI1083111769
Entity TypeIndividualMale
Primary Taxonomy2080P0208X
Provider Legal NameGEOFFREY MITCHELL GUENTHERCredential: MD, MPH
Location Address300 LONGWOOD AVEBoston, MA 02115-5724
Mailing Address300 Longwood Ave, Bch 3118Boston, MA 02115 · (617) 919-2900
Phone(617) 919-2900
Sole ProprietorYes
Medical School CMSTulane University School Of MedicineGraduated 2018
Enumeration DateApril 10, 2018
Last NPPES UpdateJuly 15, 20212 updates tracked since enumeration
NPPES CertifiedJuly 15, 2021
✔ NPI 1083111769 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Infectious DiseasesAllopathic & Osteopathic Physicians
Taxonomy Code2080P0208X
License✔ Licensed in MA · 286821
Definition
A pediatrician trained to care for children in the diagnosis, treatment and prevention of infectious diseases. This specialist can apply specific knowledge to affect a better outcome for pediatric infections with complicated courses, underlying diseases that predispose to unusual or severe infections, unclear diagnoses, uncommon diseases and complex or investigational treatments.
300 LONGWOOD AVE, Boston, MA 02115
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Geoffrey Mitchell Guenther Md, Mph is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4981061447
PECOS Enrollment IDI20230530000537
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

2

Medicare enrollment records show Geoffrey Guenther reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

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
Pine Ridge Indian Health Service Hospital
1,550 mi
Clinic/Center
119 SOUTH 1ST AVENUE
Martin, SD 57551
  • Reassigned Medicare billing, Texas enrollment
  • 426 clinicians in this Medicare group
NPI 1003208257 (605) 685-2800

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

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 Geoffrey Guenther's NPI number?

The NPI number for Geoffrey Guenther is 1083111769. It was assigned to this individual provider in the NPPES registry on April 10, 2018.

Where is Geoffrey Guenther located?

Geoffrey Guenther practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 919-2900.

What is Geoffrey Guenther's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Infectious Diseases, with taxonomy code 2080P0208X.

Is Geoffrey Guenther enrolled in Medicare?

Yes. Geoffrey Guenther is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Geoffrey Guenther's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Geoffrey Guenther reassigns Medicare benefits to 2 organizations: Children's Hospital Pediatric Associates, Inc (Boston, MA) and Pine Ridge Indian Health Service Hospital (Martin, SD). 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 Geoffrey Guenther's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Geoffrey Guenther was last updated on July 15, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.