Erica Guenthner, MSN, APRN, FNP-BC
Family Medicine Physician · Westborough, MA
Erica Guenthner, MSN, APRN, FNP-BC is a family medicine physician with a practice address in Westborough, Massachusetts, and NPI 1093356123, issued on Sep 30, 2019. Check the license (Massachusetts RN2289399, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Erica Guenthner
- Credential
- MSN, APRN, FNP-BC
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- RN2289399 MA
Self-reported in NPPES; status is on the state search - Practice location
- 24 Lyman St Ste 300, Westborough, MA 01581
- Phone
- (508) 366-7100
- Enumerated
- Sep 30, 2019
- Record last updated
- Sep 30, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (508) 366-7303
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,265 in Massachusetts → Look up another NPI →
Also registered at 24 Lyman St Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Emily Powers, FNPFamily Nurse Practitioner1750114518
- Rachel Stroh, FNP-BCFamily Nurse Practitioner1629793385
Verify Erica Guenthner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license RN2289399Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average family medicine physician in 2024
1,334 Medicare Part D claims for 223 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 112 claims were for opioids.
Most prescribed
- Atorvastatin Calcium99 claims
- Lisinopril78 claims
- Trazodone Hcl45 claims
- Gabapentin37 claims
- Levothyroxine Sodium33 claims
- Sertraline Hcl31 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.
Erica Guenthner among 2,265 family medicine physician records in Massachusetts
Erica Guenthner, MSN, APRN, FNP-BC is one of 2,265 family medicine physician records with a practice address in Massachusetts. 80% 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 84% of them.
- NPI issued2019 · 84% of these records are older, 13% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 68% of these records are
- Record last updated2019 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 family medicine physician records list a practice address in Westborough
They are 10 of the 565 NPPES records with a practice address in Westborough, and 2,265 family medicine physician records in Massachusetts.
All 2,265 in Massachusetts → Every provider in Westborough → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Leah Doret, M.D.Westborough, MA 015811699781039
- Daniel Freitas, M.D.Westborough, MA 015811497827612
- Deborah Kylander, M.D.Westborough, MA 015811528046372
- Kalindi Mehta, M.D.Westborough, MA 015811861408452
- Zainab Nawab, M.D.Westborough, MA 015811184614646
- Melissa Rathmell, M.D.Westborough, MA 015811528025731
- Veronica Rusu, MDWestborough, MA 015811770568206
- John Trudel, MDWestborough, MA 015811265493738
Common questions
What is Erica Guenthner, MSN, APRN, FNP-BC's NPI number?
Erica Guenthner, MSN, APRN, FNP-BC's National Provider Identifier (NPI) is 1093356123, issued on Sep 30, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Erica Guenthner, MSN, APRN, FNP-BC located?
The NPPES record lists a practice address at 24 Lyman St Ste 300, Westborough, MA, 01581. Phone: (508) 366-7100. Providers update this record themselves, so call before visiting.
How can I verify Erica Guenthner, MSN, APRN, FNP-BC's license?
NPPES lists Massachusetts license number RN2289399, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Erica Guenthner, MSN, APRN, FNP-BC prescribe under Medicare Part D?
In 2024, Erica Guenthner, MSN, APRN, FNP-BC had 1,334 Medicare Part D claims for 223 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.