Daniel Underhill
Physician Assistant · Derby, CT
Daniel Underhill is a physician assistant with a practice address in Derby, Connecticut, and NPI 1083251490, issued on Dec 4, 2019. Check the license (Connecticut 23.005285, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Daniel Underhill
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 23.005285 CT
Self-reported in NPPES; status is on the state search - Practice location
- 130 Division St, Derby, CT 06418
- Phone
- (203) 732-1330
- Enumerated
- Dec 4, 2019
- Record last updated
- Aug 13, 2025
- Fax
- (203) 732-1332
- Medicare enrollment
- Enrolled (PECOS I20210809002483); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 2,047 in Connecticut → Look up another NPI →
Also registered at 130 Division St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohammed Abbas, MDStudent in an Organized Health Care Education/Training Program1215687991
- Jenny Abdulkarim, MDStudent in an Organized Health Care Education/Training Program1033795729
- Ahmed AbdullahStudent in an Organized Health Care Education/Training Program1255034690
- Binta Abdullahi, MDStudent in an Organized Health Care Education/Training Program1942051057
- Nicholas Adams, NPNurse Practitioner1093599979
- Divya Aggarwal, MDStudent in an Organized Health Care Education/Training Program1154558401
Verify Daniel Underhill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 23.005285Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average physician assistant in 2024
61 Medicare Part D claims for 37 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 28 claims were for opioids.
Most prescribed
- Oxycodone Hcl20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 91.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Griffin Faculty Physicians IncDerby, CT
- Mhs Primary Care, Inc.Marlborough, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Underhill among 2,047 physician assistant records in Connecticut
Daniel Underhill is one of 2,047 physician assistant records with a practice address in Connecticut. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 55% of them.
- NPI issued2019 · 55% of these records are older, 40% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2021 · median 2018 among the 1,338 with a school on file
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 physician assistant records list a practice address in Derby
They are 20 of the 453 NPPES records with a practice address in Derby, and 2,047 physician assistant records in Connecticut.
All 2,047 in Connecticut → Every provider in Derby → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Timothy Akojenu, PA-CDerby, CT 064181508149220
- Katherine Boxberger, PADerby, CT 064181427388461
- Natalie Coulis, PA-CDerby, CT 064181427006261
- Veronica Genovez, PA-CDerby, CT 064181396055000
- Jessica Gonzalez, PA-CDerby, CT 064181619367141
- Samantha Holzman, PA-CDerby, CT 064181336571165
- Linda Hricz-Borges, PA-CDerby, CT 064181528016755
- Tamara Kaliszewski, P.A..Derby, CT 064181316987621
Common questions
What is Daniel Underhill's NPI number?
Daniel Underhill's National Provider Identifier (NPI) is 1083251490, issued on Dec 4, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Underhill located?
The NPPES record lists a practice address at 130 Division St, Derby, CT, 06418. Phone: (203) 732-1330. Providers update this record themselves, so call before visiting.
How can I verify Daniel Underhill's license?
NPPES lists Connecticut license number 23.005285, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.
How much does Daniel Underhill prescribe under Medicare Part D?
In 2024, Daniel Underhill had 61 Medicare Part D claims for 37 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Daniel Underhill's MIPS final score?
The 2023 MIPS final score is 91.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.