DR. DIANA LESLIE GEISSER M.D.
NPI 1821397142
Pediatrics - Pediatric Critical Care Medicine in Boston, MA

Q: What is Diana Geisser's NPI number?

The NPI number for Diana Geisser is 1821397142. It was assigned to this individual provider in the NPPES registry on March 25, 2011.

Q: What is Diana Geisser's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.

Q: When was this NPI record last updated?

The NPPES record for Diana Geisser was last updated on March 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.

Active since March 25, 2011PECOS EnrolledAccepts Medicare Assignment

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

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

Record update history: Mar 15, 2021, Aug 12, 2020 (2 updates tracked since 2020).

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About Dr. Diana Leslie Geisser M.d. NPPES

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

DR. DIANA LESLIE GEISSER M.D. (NPI 1821397142) is an individual pediatric critical care medicine provider in Boston, Massachusetts, licensed in Massachusetts (274547) and active in the NPI registry since March 2011. She is enrolled in Medicare PECOS and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2011).

NPPES Registry Identity

NPI1821397142

Entity TypeIndividualFemale

Primary Taxonomy2080P0203X

Provider Legal NameDR. DIANA LESLIE GEISSERCredential: M.D.

Location Address300 LONGWOOD AVEBoston, MA 02115-5724

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

Phone(617) 355-6000

Sole ProprietorNo

Medical School CMSPerelman School Of Med At The University Of PennsylvaniaGraduated 2011

Enumeration DateMarch 25, 2011

Last NPPES UpdateMarch 15, 20212 updates tracked since enumeration

NPPES CertifiedMarch 15, 2021

✔ NPI 1821397142 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Critical Care MedicineAllopathic & Osteopathic Physicians

Taxonomy Code2080P0203X

License✔ Licensed in MA · 274547

Definition

A pediatrician expert in advanced life support for children from the term or near-term neonate to the adolescent. This competence extends to the critical care management of life-threatening organ system failure from any cause in both medical and surgical patients and to the support of vital physiological functions. This specialist may have administrative responsibilities for intensive care units and also facilitates patient care among other specialists.

300 LONGWOOD AVE, Boston, MA 02115

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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

Dr. Diana Leslie Geisser M.d. 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 ID9133349319

PECOS Enrollment IDI20200910002750

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

Medicare enrollment records show Diana Geisser reassigns Medicare billing to 3 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

Boston Childrens Heart Foundation Inc

Same address

Pediatric Cardiology

300 LONGWOOD AVE
Boston, MA 02115

Reassigned Medicare billing, Massachusetts enrollment
220 clinicians in this Medicare group

NPI 1982680922 (617) 355-6793

Chmc Anesthesia Foundation Inc

Same address

Pediatric Anesthesiology

300 LONGWOOD AVE
Boston, MA 02115

Reassigned Medicare billing, Massachusetts enrollment
86 clinicians in this Medicare group

NPI 1831268754 (617) 919-1340

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 Diana Geisser's NPI number?

The NPI number for Diana Geisser is 1821397142. It was assigned to this individual provider in the NPPES registry on March 25, 2011.

Where is Diana Geisser located?

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

What is Diana Geisser's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.

Is Diana Geisser enrolled in Medicare?

Yes. Diana Geisser 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 Diana Geisser's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Diana Geisser reassigns Medicare benefits to 3 organizations: Children's Hospital Pediatric Associates, Inc (Boston, MA), Boston Childrens Heart Foundation Inc (Boston, MA) and Chmc Anesthesia Foundation 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 Diana Geisser'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 Diana Geisser was last updated on March 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.