Erin M. O'Toole, PA-C
Physician Assistant · North Grafton, MA
Erin M. O'Toole, PA-C is a physician assistant with a practice address in North Grafton, Massachusetts, and NPI 1679547368, issued on Feb 17, 2006. Check the license (Massachusetts PA887, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Erin M. O'Toole
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA887 MA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Worcester St, North Grafton, MA 01536
- Phone
- (508) 839-7307
- Enumerated
- Feb 17, 2006
- Record last updated
- Jul 22, 2026
- Fax
- (508) 839-5758
- Medicare enrollment
- Enrolled (PECOS I20040309000529); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Also registered at 100 Worcester St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tracey Blum, RPHPharmacist1619578945
- Paul Bradley, MDInternal Medicine Physician1386610061
- Allyson Brown, PHARMDPharmacist1629672845
- Ainun Haq, M.DInternal Medicine Physician1063698322
- Deborah Homer, NPFamily Nurse Practitioner1952407785
- Ramya KorapatiInternal Medicine Physician1104122506
Verify Erin M. O'Toole in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA887Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average physician assistant in 2024
704 Medicare Part D claims for 178 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium47 claims
- Amlodipine Besylate43 claims
- Atorvastatin Calcium37 claims
- Gabapentin33 claims
- Lisinopril26 claims
- Nitrofurantoin Mono-Macro22 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.
Bills Medicare through one group practice
- Umass Memorial Medical Group IncWestborough, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erin M. O'Toole among 4,713 physician assistant records in Massachusetts
Erin M. O'Toole, PA-C is one of 4,713 physician assistant records with a practice address in Massachusetts. 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 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1997 · median 2019 among the 3,217 with a school on file
- Record last updated2026 · 38% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 physician assistant records list a practice address in North Grafton
They are 2 of the 131 NPPES records with a practice address in North Grafton, and 4,713 physician assistant records in Massachusetts.
All 4,713 in Massachusetts → Every provider in North Grafton → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kara ColletteNorth Grafton, MA 015361104487909
- David Blake, PA-CNorthbridge, MA 015341598266462
- Melissa BarrieauOxford, MA 015401235795832
- Julia Foye, PA-CNorthborough, MA 015321457032666
- Ryan ImelioOxford, MA 015401508634775
- Briana Jackson, PA-SNorthborough, MA 015321023853215
- Michelle Jacques, PA-CNorthborough, MA 015321285042671
- Allison KenneyNorthborough, MA 015321528536711
Common questions
What is Erin M. O'Toole, PA-C's NPI number?
Erin M. O'Toole, PA-C's National Provider Identifier (NPI) is 1679547368, issued on Feb 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Erin M. O'Toole, PA-C located?
The NPPES record lists a practice address at 100 Worcester St, North Grafton, MA, 01536. Phone: (508) 839-7307. Providers update this record themselves, so call before visiting.
How can I verify Erin M. O'Toole, PA-C's license?
NPPES lists Massachusetts license number PA887, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Erin M. O'Toole, PA-C prescribe under Medicare Part D?
In 2024, Erin M. O'Toole, PA-C had 704 Medicare Part D claims for 178 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
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.