Dr. Michael H Kelleher , MD
Internal Medicine • Worcester, MA
5 Neponset St Fl Street12
Worcester, MA 016062714
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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Dr. Michael Kelleher is listed in NPPES under Internal Medicine.
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NPI assigned on March 11, 2006; this date does not establish years in practice.
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Published CMS data list 11 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Published rows only; this is not a quality measure.
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Published Part D records, 2023:
- Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl) — 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. 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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Medicare Part D prescriptions went from 12 in 2016 to 11 in 2023.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2016–2023.
Practice Location & Contact Primary Location
5 Neponset St Fl Street12
Worcester, MA 016062714
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
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
11 standardized 30-day fills in 2023
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
$162 in 2023
The total cost of these prescriptions in 2023, 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, 2023.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
NPI first issued
2006
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, CMS release of October 2, 2026; 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, CMS release of October 2, 2026.
Compared with the same specialty in Worcester and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Kelleher are from 2023.
443 active clinicians are listed under Internal Medicine with a practice address in Worcester, MA (6,822 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Worcester
18.5% of these 443 clinicians have the CMS telehealth indicator.
59.1% of these 443 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 12 in 2016 to 11 in 2023.
- 2016: 12
- 2017: 14
- 2018: 23
- 2019: 26
- 2023: 11
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30-day fills
30-day fills went from 12 in 2016 to 11 in 2023.
- 2016: 12
- 2017: 14
- 2018: 23
- 2019: 26
- 2023: 11
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Part D drug cost
Part D drug cost went from $144 in 2016 to $162 in 2023.
- 2016: $144
- 2017: $162
- 2018: $307
- 2019: $322
- 2023: $162
Sources: CMS Medicare Part D Prescribers (2023), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2023.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Gavilyte-G | Peg3350/Sod Sulf,bicarb,cl/Kcl | 11 | 13 | $161.62 | 11 |
Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Speech-Language Pathologist
CCCA
Otolaryngology - Otolaryngology/Facial Plastic Surgery
Doctor of Medicine (M.D.)
Audiologist
Doctor of Philosophy (Ph.D.)
Otolaryngology
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Specialist
Doctor of Medicine (M.D.)
Otolaryngology
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 5 NEPONSET ST FL STREET12, WORCESTER, MA 016062714 (Tel: 5083683103)
Registered at 5 NEPONSET ST FL STREET12, WORCESTER, MA 016062714 (Tel: 5085952300)
NPI status registered as active in NPPES database
Registered at 191 MAY ST, WORCESTER, MA 01602 (Tel: 5083683103)
Registered at 630 PLANTATION ST, WOT 2ND FL, STE C203, WORCESTER, MA 016052038 (Tel: 5088520600)
Recorded as MICHAEL KELLEHER, MD
Internal Medicine (license number reported to NPPES: MA 44235)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Worcester
- Dr. Vanitha Velayutham, MD
- Dr. Gautam Chhajed, MD
- Dr. Morris Milman, MD
- Dr. Jang Singh, MD
- Dr. Akil Sherif, MD
- Dr. George Eypper, MD
Mailing Address
5 Neponset St Fl Street12
Worcester, MA 016062714
Phone: 5085952300