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NICHOLAS G. GUERINA M.D.
NPI 1699885863
Pediatrics - Neonatal-Perinatal Medicine in Providence, RI

Active since August 30, 2006PECOS Enrolled
101 DUDLEY ST, PROVIDENCE, RI 02905(401) 274-1122(401) 453-7571 Get Directions Write a Review

NPPES record last updated: July 31, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Nicholas G. Guerina M.d. NPPES

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

NICHOLAS G. GUERINA M.D. (NPI 1699885863) is an individual neonatal-perinatal medicine provider in Providence, Rhode Island, licensed in Rhode Island (MD13423) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1699885863
Entity TypeIndividualMale
Primary Taxonomy2080N0001X
Provider Legal NameNICHOLAS G. GUERINACredential: M.D.
Location Address101 DUDLEY STProvidence, RI 02905-2401
Mailing Address455 Toll Gate Rd, Prc And CredentialingWarwick, RI 02886 · (401) 273-0641 · Fax (401) 273-2919
Phone(401) 274-1122
Fax(401) 453-7571
Sole ProprietorNo
Enumeration DateAugust 30, 2006
Last NPPES UpdateJuly 31, 2026
NPPES CertifiedJuly 31, 2026
✔ NPI 1699885863 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080N0001X
License✔ Licensed in RI · MD13423
Definition
A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.
Also ListedPediatricsTaxonomy 208000000X · License 57882 (MA)
101 DUDLEY ST, Providence, RI 02905
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1101 Plain St Fl 6Providence, RI 02903-4829 · Phone (401) 274-1122 · Fax (401) 453-7622
Location 2455 Toll Gate RdWarwick, RI 02886-2759 · Phone (401) 737-7000 · Fax (401) 736-4546

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Nicholas G. Guerina M.d. 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 Reassignment

Medicare enrollment records show Nicholas Guerina reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Affinity Physicians LLC
Same address
Anesthesiology
101 DUDLEY STREET, WIH DEPT OF ANESTHESIOLOGY
Providence, RI 02905
  • Reassigned Medicare billing, Rhode Island enrollment
  • 984 clinicians in this Medicare group
NPI 1053038471 (401) 274-1122

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

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CHRISTOPHER DONALD PALMER DO
Internal Medicine
101 DUDLEY ST
PROVIDENCE, RI 02905
Providence County (401) 274-1122
BRITTANY S HAMPTON MD
Obstetrics & Gynecology (Urogynecology and Reconstructive Pelvic Surgery)
101 DUDLEY ST
PROVIDENCE, RI 02905
Providence County (401) 274-1100
HEIDI FANION LCSW
Social Worker (Clinical)
101 DUDLEY ST
PROVIDENCE, RI 02905
Providence County (401) 274-1100
MS. LINDA BEETLESTONE MS
Genetic Counselor, MS
101 DUDLEY ST
PROVIDENCE, RI 02905
Providence County (401) 453-7515
JULIE ANNA KNUTSON RN, CNM
Advanced Practice Midwife
101 DUDLEY ST
PROVIDENCE, RI 02905
Providence County (401) 274-1122
BETHANY DAWSON LICSW
Social Worker (Clinical)
101 DUDLEY ST
PROVIDENCE, RI 02905
Providence County (401) 274-1100
HEATHER A SMITH MD, MPH
Obstetrics & Gynecology (Obstetrics)
101 DUDLEY ST
PROVIDENCE, RI 02905
Providence County (401) 274-1122
NADINE C KASSIS MD
Obstetrics & Gynecology
101 DUDLEY ST
PROVIDENCE, RI 02905
Providence County (401) 274-1100

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 Nicholas Guerina's NPI number?

The NPI number for Nicholas Guerina is 1699885863. It was assigned to this individual provider in the NPPES registry on August 30, 2006.

Where is Nicholas Guerina located?

Nicholas Guerina practices at 101 Dudley St, Providence, RI 02905. The listed phone number is (401) 274-1122.

What is Nicholas Guerina's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Is Nicholas Guerina enrolled in Medicare?

Yes. Nicholas Guerina is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Nicholas Guerina's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nicholas Guerina reassigns Medicare benefits to Affinity Physicians LLC (Providence, RI). The 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 Nicholas Guerina'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 Nicholas Guerina was last updated on July 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.