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DR. MARK A GREGORIO DNP, APRN, CNP, NP-C
NPI 1598066698
Nurse Practitioner - Adult Health in New Haven, CT

Active since November 06, 2010PECOS Enrolled
42 CONCORD ST, NEW HAVEN, CT 06512(860) 823-0645 Get Directions Write a Review

NPPES record last updated: October 14, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Mark A Gregorio Dnp, Aprn, Cnp, Np-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARK A GREGORIO DNP, APRN, CNP, NP-C (NPI 1598066698) is an individual adult health provider in New Haven, Connecticut, licensed in Connecticut (12.004539) and active in the NPI registry since November 2010. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1598066698
Entity TypeIndividualMale
Primary Taxonomy363LA2200X
Provider Legal NameDR. MARK A GREGORIOCredential: DNP, APRN, CNP, NP-C
Location Address42 CONCORD STNew Haven, CT 06512-4005
Mailing Address42 Concord StNew Haven, CT 06512-4005 · (860) 823-0645 · Fax (203) 469-9925
Phone(860) 823-0645
Sole ProprietorNo
Enumeration DateNovember 6, 2010
Last NPPES UpdateOctober 14, 2021
NPPES CertifiedOctober 14, 2021
✔ NPI 1598066698 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Adult HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2200X
License✔ Licensed in CT · 12.004539
42 CONCORD ST, New Haven, CT 06512
Open in Google Maps ↗

Other Identifiers 3

Other4539CT · Aprn
Other071501CT · Rn
OtherRN2338443MA · Rn/aprn

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark A Gregorio Dnp, Aprn, Cnp, Np-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Mark Gregorio reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Advanced Pain And Regenerative Medical Solutions Corp
13 mi
Family Medicine
10 PROGRESS DR
Shelton, CT 06484
  • Reassigned Medicare billing, Connecticut enrollment
  • 6 clinicians in this Medicare group
NPI 1245014331 (203) 948-8127
Community Care Health Network LLC
828 mi
Nurse Practitioner
424 CHURCH ST STE 220
Nashville, TN 37219
  • Reassigned Medicare billing, New Hampshire enrollment
  • 30 clinicians in this Medicare group
NPI 1619368842 (877) 564-3627
Matrix Medical Plus
828 mi
Nurse Practitioner
424 CHURCH ST STE 2600
Nashville, TN 37219
  • Reassigned Medicare billing, Massachusetts enrollment
  • 125 clinicians in this Medicare group
NPI 1376973461 (877) 564-3627

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06512 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$93.86 typical visit price
range $60.82 – $183.10
Typical copayment $23.46 (range $15.20 – $45.77)
Most-billed visit code 99203
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Gregorio's NPI number?

The NPI number for Mark Gregorio is 1598066698. It was assigned to this individual provider in the NPPES registry on November 6, 2010.

Where is Mark Gregorio located?

Mark Gregorio practices at 42 Concord St, New Haven, CT 06512. The listed phone number is (860) 823-0645.

What is Mark Gregorio's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

Is Mark Gregorio enrolled in Medicare?

Yes. Mark Gregorio is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mark Gregorio's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Gregorio reassigns Medicare benefits to 3 organizations: Advanced Pain And Regenerative Medical Solutions Corp (Shelton, CT), Community Care Health Network LLC (Nashville, TN) and Matrix Medical Plus (Nashville, TN). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Gregorio's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mark Gregorio was last updated on October 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.