KAYLA THERESA HARTJES M.D.
NPI 1619339819
Pediatrics - Pediatric Gastroenterology in Worcester, MA

Q: What is Kayla Hartjes's NPI number?

The NPI number for Kayla Hartjes is 1619339819. It was assigned to this individual provider in the NPPES registry on March 26, 2016.

Q: What is Kayla Hartjes's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.

Q: When was this NPI record last updated?

The NPPES record for Kayla Hartjes was last updated on December 14, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 26, 2016PECOS Enrolled

55 LAKE AVE N, WORCESTER, MA 01655(508) 334-1000 Get Directions Write a Review

NPPES record last updated: December 14, 2023. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Dec 14, 2023, Jul 3, 2019, Jun 13, 2016 and 1 more (4 updates tracked since 2016).

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About Kayla Theresa Hartjes M.d. NPPES

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

KAYLA THERESA HARTJES M.D. (NPI 1619339819) is an individual pediatric gastroenterology provider in Worcester, Massachusetts, licensed in Massachusetts (279598) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS and maintains a secondary practice location in Boston.

NPPES Registry Identity

NPI1619339819

Entity TypeIndividualFemale

Primary Taxonomy2080P0206X

Provider Legal NameKAYLA THERESA HARTJESCredential: M.D.

Location Address55 LAKE AVE NWorcester, MA 01655-0002

Mailing Address55 Fruit StBoston, MA 02114-2621 · (617) 726-2000

Phone(508) 334-1000

Sole ProprietorNo

Enumeration DateMarch 26, 2016

Last NPPES UpdateDecember 14, 20234 updates tracked since enumeration

NPPES CertifiedDecember 14, 2023

✔ NPI 1619339819 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code2080P0206X

License✔ Licensed in MA · 279598

Definition

A pediatrician who specializes in the diagnosis and treatment of diseases of the digestive systems of infants, children and adolescents. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using lighted scopes to see internal organs.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

55 LAKE AVE N, Worcester, MA 01655

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Secondary Practice Location 1

Location 155 Fruit StBoston, MA 02114-2621 · Phone (617) 726-8705

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Kayla Theresa Hartjes 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

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

The General Hospital Corporation

36 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

36 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 01655 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

$134.47 typical visit price

range $58.86 – $177.36

Typical copayment $33.61 (range $14.71 – $44.34)

Most-billed visit code 99204

Established Patient

$103.48 typical visit price

range $19.11 – $144.84

Typical copayment $25.87 (range $4.77 – $36.21)

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.

HILLARY R. IRONS MD

Emergency Medicine

55 LAKE AVE N
WORCESTER, MA 01655

Worcester County (508) 421-1400

MS. SHERINE MARY HASSEY-HALLIGAN NP

Nurse Practitioner

55 LAKE AVE N
WORCESTER, MA 01655

Worcester County (508) 334-8585

MS. EILEEN A. DUHAMEL NP

Nurse Practitioner

55 LAKE AVE N, DEPARTMENT OF RADIOLOGY
WORCESTER, MA 01655

Worcester County (508) 334-2710

EWA HRYNISZYN CRNA

Nurse Anesthetist, Certified Registered

55 LAKE AVE N, DEPARTMENT OF ANESTHESIOLOGY
WORCESTER, MA 01655

Worcester County (508) 334-3271

HELEN COPSEY PA-C

Physician Assistant

55 LAKE AVE N
WORCESTER, MA 01655

Worcester County (508) 334-8585

DR. ADEPEJU GBADEBO CHAMPION M.D.

Internal Medicine

55 LAKE AVE N
WORCESTER, MA 01655

Worcester County (508) 334-2731

SOWMYA KORAPATI

Internal Medicine (Hematology & Oncology)

55 LAKE AVE N
WORCESTER, MA 01655

Worcester County (508) 334-3550

LAYLA FAKHRZADEH M.D.

Anesthesiology

55 LAKE AVE N, ANESTHESIOLOGY
WORCESTER, MA 01655

Worcester County (508) 334-3271

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 Kayla Hartjes's NPI number?

The NPI number for Kayla Hartjes is 1619339819. It was assigned to this individual provider in the NPPES registry on March 26, 2016.

Where is Kayla Hartjes located?

Kayla Hartjes practices at 55 Lake Ave N, Worcester, MA 01655. The listed phone number is (508) 334-1000.

What is Kayla Hartjes's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.

Is Kayla Hartjes enrolled in Medicare?

Yes. Kayla Hartjes is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Kayla Hartjes's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kayla Hartjes reassigns Medicare benefits to 2 organizations: 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 Kayla Hartjes'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 Kayla Hartjes was last updated on December 14, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.