Kerry Grennan, NP
NPI 1326299017 · Adult Health Nurse Practitioner · East Boston, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kerry Grennan, NP is a Adult Health Nurse Practitioner provider in East Boston, MA (NPI 1326299017).
Provider details
- NPI number
- 1326299017
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 273942 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
596 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 476 | $44 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 66 | $116 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 42 | $69 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 12 | $105 |
Typical Medicare-allowed amounts for these services range $44–$116 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Empagliflozinbrand: Jardiance | 25 | 14 |
| Metformin Hcl | 20 | — |
| Semaglutidebrand: Ozempic | 20 | — |
| Dulaglutidebrand: Trulicity | 18 | — |
| Atorvastatin Calcium | 16 | — |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 13 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-10-01
- Last updated
- 2008-10-01
Frequently asked questions
- What is Kerry Grennan's NPI number?
- Kerry Grennan's National Provider Identifier (NPI) is 1326299017, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kerry Grennan's specialty?
- Kerry Grennan is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kerry Grennan located?
- Kerry Grennan's practice location on file with NPPES is 10 Gove St, East Boston, MA 02128-1920.
- What is Kerry Grennan's phone number?
- The practice phone number listed in the NPPES registry for Kerry Grennan is (617) 569-5800.
- Does Kerry Grennan accept Medicare?
- Kerry Grennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kerry Grennan's NPI active?
- Yes — Kerry Grennan's NPI (1326299017) is active in the NPPES registry as of the last update on 2008-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.