Kerry B. Grennan, NP
Adult Health Nurse Practitioner · East Boston, MA
Kerry B. Grennan, NP is an adult health nurse practitioner with a practice address in East Boston, Massachusetts, and NPI 1326299017, issued on Oct 1, 2008. Check the license (Massachusetts 273942, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Kerry B. Grennan
- Credential
- NP
- Primary taxonomy
- Adult Health Nurse Practitioner 363LA2200X
- License number
- 273942 MA
Self-reported in NPPES; status is on the state search - Practice location
- 10 Gove St, East Boston, MA 02128
- Phone
- (617) 569-5800
- Enumerated
- Oct 1, 2008
- Record last updated
- Oct 1, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (617) 568-4780
- Medicare enrollment
- Enrolled (PECOS I20081120000692); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest adult health nurse practitioner records → All 1,465 in Massachusetts → Look up another NPI →
Also registered at 10 Gove St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kerry B. Grennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 273942Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average adult health nurse practitioner in 2024
309 Medicare Part D claims for 146 beneficiaries, against an average of 1,280 among the 16,937 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Jardiance25 claims
- Metformin Hcl20 claims
- Ozempic20 claims
- Trulicity18 claims
- Atorvastatin Calcium16 claims
- Lantus Solostar13 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
- Massachusetts General Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kerry B. Grennan among 1,465 adult health nurse practitioner records in Massachusetts
Kerry B. Grennan, NP is one of 1,465 adult health nurse practitioner records with a practice address in Massachusetts. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 44% of them.
- NPI issued2008 · 44% of these records are older, 50% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2008 · median 2010 among the 634 with a school on file
- Record last updated2008 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2200X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 adult health nurse practitioner records list a practice address in East Boston
They are 12 of the 587 NPPES records with a practice address in East Boston, and 1,465 adult health nurse practitioner records in Massachusetts.
All 1,465 in Massachusetts → Every provider in East Boston → Adult Health Nurse Practitioner nationwide →
The 8 adult health nurse practitioner records with the nearest ZIP codes
- Aisha Ellis, NPEast Boston, MA 021281316383268
- Patricia Fryzel, RNPEast Boston, MA 021281861431421
- Kimberlyn Grams, NPEast Boston, MA 021281841476207
- Jill Hallisey, NPEast Boston, MA 021281376667287
- Shannon Johnson, NP-CEast Boston, MA 021281417158296
- Molly Lemoine, NPEast Boston, MA 021281992006969
- Roberto Mastroianni, NPEast Boston, MA 021281174856744
- Galina Smith, CNPEast Boston, MA 021281417768417
Common questions
What is Kerry B. Grennan, NP's NPI number?
Kerry B. Grennan, NP's National Provider Identifier (NPI) is 1326299017, issued on Oct 1, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Kerry B. Grennan, NP located?
The NPPES record lists a practice address at 10 Gove St, East Boston, MA, 02128. Phone: (617) 569-5800. Providers update this record themselves, so call before visiting.
How can I verify Kerry B. Grennan, NP's license?
NPPES lists Massachusetts license number 273942, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Kerry B. Grennan, NP prescribe under Medicare Part D?
In 2024, Kerry B. Grennan, NP had 309 Medicare Part D claims for 146 beneficiaries; the average among adult health nurse practitioner prescribers was 1,280. 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.