Daniel Underhill
Physician Assistant β’ Derby, CT
130 Division St
Derby, CT 064181326
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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Daniel Underhill is listed in NPPES under Physician Assistant.
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NPI assigned on December 4, 2019; this date does not establish years in practice.
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Published CMS data list 20 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Oxycodone Hcl β 20 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β 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 Β· Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 80% of clinicians listed under Physician Assistant in Derby, CT (2024, 14 clinicians with data). Median for this group: 143. Middle half: 74 to 378.
Fewer Part D prescriptions than 85% of clinicians listed under Physician Assistant in Connecticut (2024, 997 clinicians with data). Median for this group: 225. Middle half: 56 to 692.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 12 in 2023 to 20 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023β2024.
Practice Location & Contact Primary Location
130 Division St
Derby, CT 064181326
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 2 distinct group names: Griffin Faculty Physicians Inc; Mhs Primary Care, Inc.. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2021
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
20 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
$50 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 β by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $4,243.81 across 9 records.
By nature of payment
- Consulting Fee: $3,899.95 across 5 records.
- Travel and Lodging: $175.00 across 1 record.
- Food and Beverage: $168.86 across 3 records.
Reporting-company totals
- Medtronic, Inc.: $4,141.99 across 8 records.
- Solventum Corporation: $101.82 across 1 record.
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 2025 (published June 30, 2026).
Years since graduation
5 years (graduated 2021)
CMS Doctors and Clinicians data list 2021 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2019
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.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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, βDoes your provider accept Medicare as full payment?β
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)
Daniel Underhill 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 Daniel Underhill 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 Derby and Connecticut
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 80% of clinicians listed under Physician Assistant in Derby, CT (2024, 14 clinicians with data). Median for this group: 143. Middle half: 74 to 378.
Fewer Part D prescriptions than 85% of clinicians listed under Physician Assistant in Connecticut (2024, 997 clinicians with data). Median for this group: 225. Middle half: 56 to 692.
Part D drug cost
A lower Part D drug cost than 80% of clinicians listed under Physician Assistant in Derby, CT (2024, 14 clinicians with data). Median for this group: $1,648. Middle half: $415 to $17,346.
A lower Part D drug cost than 95% of clinicians listed under Physician Assistant in Connecticut (2024, 997 clinicians with data). Median for this group: $2,787. Middle half: $445 to $78,108.
20 active clinicians are listed under Physician Assistant with a practice address in Derby, CT (2,047 in Connecticut).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Derby
25% of these 20 clinicians have the CMS telehealth indicator.
75% of these 20 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 2023 to 20 in 2024.
- 2023: 12
- 2024: 20
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30-day fills
30-day fills went from 12 in 2023 to 20 in 2024.
- 2023: 12
- 2024: 20
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Part D drug cost
Part D drug cost went from $36 in 2023 to $50 in 2024.
- 2023: $36
- 2024: $50
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2025 only.
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· 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 2025 (payments made January 1 β December 31, 2025): fewer than 11 records totaling $4,243.81.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Medtronic, Inc. |
Consulting Fee
Cash or cash equivalent
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β | General | $1,740.00 |
| Medtronic, Inc. |
Consulting Fee
Cash or cash equivalent
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β | General | $1,342.25 |
| Medtronic, Inc. |
Consulting Fee
Cash or cash equivalent
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β | General | $726.00 |
| Medtronic, Inc. |
Travel and Lodging
In-kind items and services
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β | General | $175.00 |
| Solventum Corporation |
Food and Beverage
Cash or cash equivalent
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PREVENA | General | $101.82 |
| Medtronic, Inc. |
Consulting Fee
Cash or cash equivalent
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β | General | $45.85 |
| Medtronic, Inc. |
Consulting Fee
Cash or cash equivalent
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β | General | $45.85 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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β | General | $42.04 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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β | General | $25.00 |
Source: CMS Open Payments, program year 2025, 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 |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 20 | 77 | $49.80 | 20 |
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: 2025-08-13NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20210809002483
CT
3779987052
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Mhs Primary Care, Inc.
28 Crescent St, Middletown, CT 064573654
Griffin Faculty Physicians Inc
130 Division St, Derby, CT 064181326
Phone: 2037321352
Mhs Primary Care, Inc.
540 Saybrook Rd, Middletown, CT 064574711
Phone: 8603585120
Mhs Primary Care, Inc.
14 Jones Hollow Rd, Marlborough, CT 064471448
Phone: 8603582850
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Advanced Practice Registered Nurse, Family Nurse Practitioner (Board Certified)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine - Pulmonary Disease
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 130 DIVISION ST, DERBY, CT 064181326 (Tel: 2037321330)
Registered at 67 MAPLE AVE, DERBY, CT 064181328 (Tel: 2037321330)
Physician Assistant (license number reported to NPPES: CT 23.005285)
Registered at 100 GRAND ST, NEW BRITAIN, CT 060522016 (Tel: 4138547537)
Registered at 154 RAYMOND RD UNIT 2, WEST HARTFORD, CT 061072542 (Tel: 4138547537)
NPI status registered as active in NPPES database
Registered at 6 PARLEY ST, GREAT BARRINGTON, MA 012301323 (Tel: 4138547537)
Registered at 6 PARLEY ST, GREAT BARRINGTON, MA 012301323
Recorded as DANIEL UNDERHILL
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Derby
- Natalie Coulis, PA-C
- Gregory Przedpelski, PA-C
- Nikolett Kocsis, PA-C
- Tiji Zehring, PA
- Rebecca Pritchard, PA-C
- Olivia Thomas, PA-C
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Mailing Address
67 Maple Ave
Derby, CT 064181328
Phone: 2037321330