Dennis O'Brien, RN
NPI 1215602214 · General Practice Registered Nurse · Springfield, MA
Dennis O'Brien, RN is a General Practice Registered Nurse provider in Springfield, MA (NPI 1215602214).
Provider details
- NPI number
- 1215602214
- Entity type
- Individual
- Primary specialty
- General Practice Registered NurseNursing Service Providers
- Credential
- RN
- Sex
- Male
- Sole proprietor
- No
- License
- 160333 (MA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-08-11
- Last updated
- 2021-08-11
- Certified
- 2021-08-11
Frequently asked questions
- What is Dennis O'Brien's NPI number?
- Dennis O'Brien's National Provider Identifier (NPI) is 1215602214, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis O'Brien's specialty?
- Dennis O'Brien is listed in the NPPES registry with a primary specialty of General Practice Registered Nurse (Nursing Service Providers).
- Where is Dennis O'Brien located?
- Dennis O'Brien's practice location on file with NPPES is 130 Maple St, Springfield, MA 01103-2202.
- What is Dennis O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Dennis O'Brien is (413) 737-9544.
- Is Dennis O'Brien's NPI active?
- Yes — Dennis O'Brien's NPI (1215602214) is active in the NPPES registry as of the last update on 2021-08-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.