Jonathan K Underhill , PA-C
Physician Assistant • Boston, MA
1 Deaconess Rd, Clinical Center Room 303
Boston, MA 022155321
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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Jonathan Underhill is listed in NPPES under Physician Assistant.
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NPI assigned on June 10, 2009; this date does not establish years in practice.
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Published CMS data list 71 Medicare Part D prescriptions, including refills, in 2021.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2021. Published rows only; this is not a quality measure.
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Published Part D records, 2021:
- Oxycodone Hcl — 20 prescription fills, including refills.
- Omeprazole — 15 prescription fills, including refills.
- Ibuprofen — 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2021. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 5 records in the table · Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 20 in 2014 to 71 in 2021.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2014–2021.
Practice Location & Contact Primary Location
1 Deaconess Rd
Clinical Center Room 303
Boston, MA 022155321
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 1 group name: Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr 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
1991
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
71 standardized 30-day fills in 2021
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
$183 in 2021
The total cost of these prescriptions in 2021, 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, 2021.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021–2025.
Years since graduation
35 years (graduated 1991)
CMS Doctors and Clinicians data list 1991 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
2009
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, “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)
Jonathan 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 Jonathan 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 Boston and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Jonathan Underhill are from 2021.
1,660 active clinicians are listed under Physician Assistant with a practice address in Boston, MA (4,715 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boston
15.4% of these 1,660 clinicians have the CMS telehealth indicator.
57.1% of these 1,660 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 increased 255% from 20 in 2014 to 71 in 2021.
- 2014: 20
- 2015: 11
- 2018: 14
- 2019: 11
- 2021: 71
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30-day fills
30-day fills increased 255% from 20 in 2014 to 71 in 2021.
- 2014: 20
- 2015: 11
- 2018: 14
- 2019: 11
- 2021: 71
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Part D drug cost
Part D drug cost went from $83 in 2014 to $183 in 2021.
- 2014: $83
- 2015: $51
- 2018: $28
- 2019: $27
- 2021: $183
Sources: CMS Medicare Part D Prescribers (2021), CMS Doctors and Clinicians, 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 2021.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 20 | 52 | $73.58 | 19 |
| Omeprazole | Omeprazole | 15 | 117 | $29.26 | 14 |
| Ibuprofen | Ibuprofen | 13 | 81 | $33.02 | 13 |
| Prednisone | Prednisone | 12 | 15 | $17.54 | — |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 11 | 75 | $29.86 | 11 |
Source: CMS Part D by Provider and Drug, 2021; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC 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
I20250307002368
MA
8325569239
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
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
600 Unicorn Park Dr, Woburn, MA 018013376
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
330 Brookline Ave, Boston, MA 022155400
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
330 Brookline Ave, Boston, MA 022155400
Phone: 6177548612
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
1 Deaconess Rd, Boston, MA 022155321
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
Nurse Practitioner
Anesthesiology
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Radiology - Vascular & Interventional Radiology
Emergency Medicine
Career & Practice History
NPI enumerated June 10, 2009.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Physician Assistants in Boston
- Raina Singh, PA-C
- Linnea Fulton, PA-C
- Macy Cook, PA
- Colin Flynn, PA-C
- Katlin Fister, PA-C
- Laurel Taylor
Mailing Address
1 Deaconess Rd, Clinical Center Room 303
Boston, MA 022155321
Phone: 6177542517