Mark Gregorio, DNP, APRN, CNP, NP-C
NPI 1598066698 · Adult Health Nurse Practitioner · New Haven, CT
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Gregorio, DNP, APRN, CNP, NP-C is a Adult Health Nurse Practitioner provider in New Haven, CT (NPI 1598066698).
Provider details
- NPI number
- 1598066698
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- DNP, APRN, CNP, NP-C
- Sex
- Male
- Sole proprietor
- No
- License
- 12.004539 (CT)
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 tenure33% of score
15 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$144 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-11-06
- Last updated
- 2021-10-14
- Certified
- 2021-10-14
Frequently asked questions
- What is Mark Gregorio's NPI number?
- Mark Gregorio's National Provider Identifier (NPI) is 1598066698, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Gregorio's specialty?
- Mark Gregorio is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mark Gregorio located?
- Mark Gregorio's practice location on file with NPPES is 42 Concord St, New Haven, CT 06512-4005.
- What is Mark Gregorio's phone number?
- The practice phone number listed in the NPPES registry for Mark Gregorio is (860) 823-0645.
- Does Mark Gregorio accept Medicare?
- Mark Gregorio is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Gregorio's NPI active?
- Yes — Mark Gregorio's NPI (1598066698) is active in the NPPES registry as of the last update on 2021-10-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.