MARIANNE RIORDAN MD
NPI 1649891961
Internal Medicine - Endocrinology, Diabetes & Metabolism in Philadelphia, PA

Q: What is Marianne Riordan's NPI number?

The NPI number for Marianne Riordan is 1649891961. It was assigned to this individual provider in the NPPES registry on April 27, 2020.

Q: What is Marianne Riordan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Q: When was this NPI record last updated?

The NPPES record for Marianne Riordan was last updated on January 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.

Active since April 27, 2020PECOS EnrolledAccepts Medicare Assignment

3401 N BROAD ST, PHILADELPHIA, PA 19140(215) 707-4600(215) 707-5599 Get Directions Write a Review

NPPES record last updated: January 30, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Jan 30, 2026, Aug 5, 2025 (2 updates tracked since 2025).

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About Marianne Riordan Md NPPES

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

MARIANNE RIORDAN MD (NPI 1649891961) is an individual endocrinology, diabetes & metabolism provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (MD490718) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS, is affiliated with Temple University Hospital, and is a graduate of Other (2016).

NPPES Registry Identity

NPI1649891961

Entity TypeIndividualFemale

Primary Taxonomy207RE0101X

Provider Legal NameMARIANNE RIORDANCredential: MD

Location Address3401 N BROAD STPhiladelphia, PA 19140-5103

Mailing Address3509 N Broad StPhiladelphia, PA 19140-4105 · (215) 707-2433

Phone(215) 707-4600

Fax(215) 707-5599

Sole ProprietorYes

Medical School CMSOtherGraduated 2016

Enumeration DateApril 27, 2020

Last NPPES UpdateJanuary 30, 20262 updates tracked since enumeration

NPPES CertifiedJanuary 30, 2026

✔ NPI 1649891961 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians

Taxonomy Code207RE0101X

License✔ Licensed in PA · MD490718

Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

3401 N BROAD ST, Philadelphia, PA 19140

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marianne Riordan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7719489541

PECOS Enrollment IDI20250909002093

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.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Temple University Hospital

Acute Care Hospitals · Philadelphia, PA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390027

Location3401 North Broad StreetPhiladelphia, PA 19140 · Philadelphia County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19140 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

$137.17 typical visit price

range $59.88 – $180.99

Typical copayment $34.29 (range $14.97 – $45.24)

Most-billed visit code 99204

Established Patient

$105.21 typical visit price

range $19.30 – $147.29

Typical copayment $26.30 (range $4.82 – $36.82)

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.

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.

DR. JAMIE L. GARFIELD MD

Internal Medicine