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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

EMILY DIEZEMANN
NPI 1821770165
Nurse Practitioner - Family in Boston, MA

Active since August 04, 2023PECOS Enrolled
300 LONGWOOD AVE, BOSTON, MA 02115(617) 645-4450 Get Directions Write a Review

NPPES record last updated: July 28, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Jul 28, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Emily Diezemann NPPES

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

EMILY DIEZEMANN (NPI 1821770165) is an individual family provider in Boston, Massachusetts, licensed in Massachusetts (RN2354319) and active in the NPI registry since August 2023. She is enrolled in Medicare PECOS and maintains a secondary practice location in Boston.

NPPES Registry Identity

NPI1821770165
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameEMILY DIEZEMANN
Location Address300 LONGWOOD AVEBoston, MA 02115-5724
Mailing Address300 Longwood AveBoston, MA 02115-5724 · (774) 266-6969
Phone(617) 645-4450
Sole ProprietorNo
Enumeration DateAugust 4, 2023
Last NPPES UpdateJuly 28, 20262 updates tracked since enumeration
NPPES CertifiedJuly 28, 2026
✔ NPI 1821770165 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in MA · RN2354319
Also ListedFamily MedicineTaxonomy 207Q00000X · License RN2354319 (MA)
300 LONGWOOD AVE, Boston, MA 02115
Open in Google Maps ↗

Secondary Practice Location 1

Location 1110 Francis StBoston, MA 02215-5501 · Phone (617) 754-4450

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, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Emily Diezemann 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.

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 Emily Diezemann's NPI number?

The NPI number for Emily Diezemann is 1821770165. It was assigned to this individual provider in the NPPES registry on August 4, 2023.

Where is Emily Diezemann located?

Emily Diezemann practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 645-4450.

What is Emily Diezemann's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Emily Diezemann enrolled in Medicare?

Yes. Emily Diezemann is registered in the Medicare PECOS enrollment system.

What insurance does Emily Diezemann accept?

Health plans from Anthem Blue Cross and Blue Shield list Emily Diezemann 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 Emily Diezemann was last updated on July 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 days 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.