Karen Courtney Shellenbarger , NP
Nurse Practitioner - Pediatrics • Worcester, MA
55 Lake Ave N
Worcester, MA 01655
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Karen Shellenbarger is listed in NPPES under Nurse Practitioner - Pediatrics.
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NPI assigned on August 21, 2008; this date does not establish years in practice.
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Published CMS data list 52 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Emflaza (Deflazacort) — 52 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 70% of clinicians listed under Nurse Practitioner - Pediatrics in Massachusetts (2024, 41 clinicians with data). Median for this group: 31. Middle half: 14 to 56.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 17 in 2022 to 52 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2022–2024.
Practice Location & Contact Primary Location
55 Lake Ave N
Worcester, MA 01655
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Nurse Practitioner - Pediatrics: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
52 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$665,573 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2023
All general payments: $1,052.43 across 3 records.
By nature of payment
- Honoraria: $990.00 across 2 records.
- Food and Beverage: $62.43 across 1 record.
Reporting-company totals
- NS Pharma, Inc.: $1,052.43 across 3 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2023 (published June 30, 2026).
NPI first issued
2008
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Karen Shellenbarger has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Karen Shellenbarger as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Worcester and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 70% of clinicians listed under Nurse Practitioner - Pediatrics in Massachusetts (2024, 41 clinicians with data). Median for this group: 31. Middle half: 14 to 56.
Too few clinicians listed under Nurse Practitioner - Pediatrics in Worcester have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 95% of clinicians listed under Nurse Practitioner - Pediatrics in Massachusetts (2024, 41 clinicians with data). Median for this group: $1,743. Middle half: $265 to $18,289.
Too few clinicians listed under Nurse Practitioner - Pediatrics in Worcester have Medicare Part D data for 2024 to compare.
21 active clinicians are listed under Nurse Practitioner - Pediatrics with a practice address in Worcester, MA (1,311 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Worcester
0% of these 21 clinicians have the CMS telehealth indicator.
14.3% of these 21 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 17 in 2022 to 52 in 2024.
- 2022: 17
- 2023: 48
- 2024: 52
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30-day fills
30-day fills went from 17 in 2022 to 52 in 2024.
- 2022: 17
- 2023: 48
- 2024: 52
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Part D drug cost
Part D drug cost increased 225% from $204,534 in 2022 to $665,573 in 2024.
- 2022: $204,534
- 2023: $610,700
- 2024: $665,573
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $495.00 in 2022 to $1,052.43 in 2023.
- 2022: $495.00
- 2023: $1,052.43
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2023), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2023 (payments made January 1 – December 31, 2023): fewer than 11 records totaling $1,052.43.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| NS Pharma, Inc. |
Honoraria
Cash or cash equivalent
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VILTEPSO | General | $660.00 |
| NS Pharma, Inc. |
Honoraria
Cash or cash equivalent
|
VILTEPSO | General | $330.00 |
| NS Pharma, Inc. |
Food and Beverage
In-kind items and services
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VILTEPSO | General | $62.43 |
Source: CMS Open Payments, program year 2023, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Emflaza | Deflazacort | 52 | 1,560 | $665,572.51 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-10-26NUCC Taxonomy Code: 363LP0200X
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NURSE PRACTITIONER
I20181127003077
MA
7113169897
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Psychiatry & Neurology - Neurology
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Neurology
Doctor of Philosophy (Ph.D.)
Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology
Doctor of Medicine (M.D.)
Pediatrics - Neurodevelopmental Disabilities
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 55 LAKE AVE N, WORCESTER, MA 01655 (Tel: 7744417615)
Nurse Practitioner (license number reported to NPPES: MA RN2324819)
Registered at 55 LAKE AVE N, WORCESTER, MA 016550002 (Tel: 7744425695)
Registered at PO BOX 415348, BOSTON, MA 022415348 (Tel: 8002258885)
Nurse Practitioner (license number reported to NPPES: MA PENDING)
NPI status registered as active in NPPES database
Registered at 3333 BURNET AVE, ML 2015, CINCINNATI, OH 452293026 (Tel: 5136364222)
Registered at 3333 BURNET AVE, ML 5021, CINCINNATI, OH 452293026 (Tel: 5136364225)
Recorded as KAREN SHELLENBARGER, NP
Nurse Practitioner (license number reported to NPPES: OH COA.10178-NP)
First registered as active Individual Practitioner in NPPES Database.
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Mailing Address
Po Box 415348
Boston, MA 022415348
Phone: 8002258885