Theresa Mazzarelli, ACNP
NPI 1134338213 · Nurse Practitioner · Worcester, MA
Theresa Mazzarelli, ACNP is a Nurse Practitioner provider in Worcester, MA (NPI 1134338213).
Provider details
- NPI number
- 1134338213
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ACNP
- Sex
- Female
- Sole proprietor
- No
- License
- 140770 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
- 2007-05-22
- Last updated
- 2010-11-05
Frequently asked questions
- What is Theresa Mazzarelli's NPI number?
- Theresa Mazzarelli's National Provider Identifier (NPI) is 1134338213, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theresa Mazzarelli's specialty?
- Theresa Mazzarelli is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Theresa Mazzarelli located?
- Theresa Mazzarelli's practice location on file with NPPES is 55 Lake Ave N, Worcester, MA 01655-0002.
- What is Theresa Mazzarelli's phone number?
- The practice phone number listed in the NPPES registry for Theresa Mazzarelli is (774) 441-7611.
- Is Theresa Mazzarelli's NPI active?
- Yes — Theresa Mazzarelli's NPI (1134338213) is active in the NPPES registry as of the last update on 2010-11-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.