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MARISSA RILEY FELKNOR MD
NPI 1093464232
Pediatrics - Pediatric Emergency Medicine in Pittsburgh, PA

Active since March 23, 2022PECOS Enrolled
4401 PENN AVE STE 2400, PITTSBURGH, PA 15224(412) 692-7980 Get Directions Write a Review

NPPES record last updated: January 27, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 27, 2026, Jun 23, 2025, Feb 4, 2025 (3 updates tracked since 2025).

About Marissa Riley Felknor Md NPPES

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

MARISSA RILEY FELKNOR MD (NPI 1093464232) is an individual pediatric emergency medicine provider in Pittsburgh, Pennsylvania, licensed in Pennsylvania (MT235207) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS, maintains a secondary practice location in Chicago, and is a graduate of University Of North Carolina At Chapel Hill School Of Medicine (2022).

NPPES Registry Identity

NPI1093464232
Entity TypeIndividualFemale
Primary Taxonomy2080P0204X
Provider Legal NameMARISSA RILEY FELKNORCredential: MD
Location Address4401 PENN AVE STE 2400Pittsburgh, PA 15224-1334
Mailing Address3600 Forbes Ave Ste 140Pittsburgh, PA 15213-3410
Phone(412) 692-7980
Sole ProprietorNo
Medical School CMSUniversity Of North Carolina At Chapel Hill School Of MedicineGraduated 2022
Enumeration DateMarch 23, 2022
Last NPPES UpdateJanuary 27, 20263 updates tracked since enumeration
NPPES CertifiedJanuary 27, 2026
✔ NPI 1093464232 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPediatrics · Pediatric Emergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080P0204X
License✔ Licensed in PA · MT235207
Definition
A pediatrician who has special qualifications to manage emergencies in infants and children.
Also ListedPediatricsTaxonomy 208000000X · License MD490829 (PA)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
4401 PENN AVE STE 2400, Pittsburgh, PA 15224
Open in Google Maps ↗

Secondary Practice Location 1

Location 1225 E Chicago AveChicago, IL 60611-2991 · Phone (312) 227-4000

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marissa Riley Felknor Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2264947563
PECOS Enrollment IDI20251028002916
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 Marissa Felknor reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Pittsburgh Physicians
Same address
Pediatrics
4401 PENN AVE
Pittsburgh, PA 15224
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 7,114 clinicians in this Medicare group
NPI 1225096639 (412) 692-5325

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

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 Marissa Felknor's NPI number?

The NPI number for Marissa Felknor is 1093464232. It was assigned to this individual provider in the NPPES registry on March 23, 2022.

Where is Marissa Felknor located?

Marissa Felknor practices at 4401 Penn Ave Ste 2400, Pittsburgh, PA 15224. The listed phone number is (412) 692-7980.

What is Marissa Felknor's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Emergency Medicine, with taxonomy code 2080P0204X.

Is Marissa Felknor enrolled in Medicare?

Yes. Marissa Felknor is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Marissa Felknor's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Felknor reassigns Medicare benefits to University Of Pittsburgh Physicians (Pittsburgh, PA). 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 Marissa Felknor'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 Marissa Felknor was last updated on January 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.