GRETCHEN K MATHEWSON FNP
NPI 1639494685
Nurse Practitioner - Family in New York, NY

Active since April 01, 2010PECOS EnrolledAccepts Medicare Assignment
5 EAST 98TH STREET, BOX 1138, NEW YORK, NY 10029(212) 241-6854(212) 241-5333 Get Directions Write a Review

NPPES record last updated: October 25, 2010. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Gretchen K Mathewson Fnp NPPES

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

GRETCHEN K MATHEWSON FNP (NPI 1639494685) is an individual family provider in New York, New York, licensed in New York (F335831) and active in the NPI registry since April 2010. She is enrolled in Medicare PECOS, is affiliated with Mount Sinai Hospital, and is a graduate of Other (2009).

NPPES Registry Identity

NPI1639494685
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameGRETCHEN K MATHEWSONCredential: FNP
Location Address5 EAST 98TH STREET, BOX 1138New York, NY 10029-6501
Mailing Address5 E 98th St, Box 1138New York, NY 10029-6501 · (212) 241-6854
Fax(212) 241-5333
Sole ProprietorYes
Medical School CMSOtherGraduated 2009
Enumeration DateApril 1, 2010
Last NPPES UpdateOctober 25, 2010
NPI 1639494685 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License Licensed in NY · F335831
5 EAST 98TH STREET, New York, NY 10029

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

Gretchen K Mathewson Fnp 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 ID2365693389
PECOS Enrollment IDI20121121000011
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.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
13 services13 patients

Hospital Affiliations CMS Care Compare 2

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

Mount Sinai Hospital

Acute Care Hospitals · New York, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330024
LocationOne Gustave L Levy PlaceNew York, NY 10029 · New York County
Emergency services Birthing friendly

Mount Sinai Beth Israel

Acute Care Hospitals · New York, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330169
LocationFirst Avenue At 16th StreetNew York, NY 10003 · New York County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10029 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
$102.04 typical visit price
range $65.69 – $198.19
Typical copayment $25.51 (range $16.42 – $49.54)
Most-billed visit code 99203
Established Patient
$114.88 typical visit price
range $21.20 – $160.66
Typical copayment $28.72 (range $5.30 – $40.16)
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.

Internal Medicine (Gastroenterology)
5 EAST 98TH STREET
NEW YORK, NY 10029
Internal Medicine (Pulmonary Disease)
5 EAST 98TH STREET, 10TH FLOOR BO MOUNT SINAI HOSPITAL PULMONARY
NEW YORK, NY 10029
Internal Medicine (Allergy & Immunology)
5 EAST 98TH STREET
NEW YORK, NY 10029
Internal Medicine (Pulmonary Disease)
5 EAST 98TH STREET, 10TH FLOOR BO MOUNT SINAI HOSPITAL PULMONARY
NEW YORK, NY 10029
Internal Medicine (Endocrinology, Diabetes & Metabolism)
5 EAST 98TH STREET, MOUNT SINAI HOSPITAL - ENDOCRINOLOGY ASSOCIATES
NEW YORK, NY 10029
Surgery
5 EAST 98TH STREET, 14TH FL
NEW YORK, NY 10029
Physician Assistant (Surgical)
5 EAST 98TH STREET, 14TH FL
NEW YORK, NY 10029
Surgery
5 EAST 98TH STREET, 14TH FL
NEW YORK, NY 10029

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 Gretchen Mathewson's NPI number?

The NPI number for Gretchen Mathewson is 1639494685. It was assigned to this individual provider in the NPPES registry on April 1, 2010.

Where is Gretchen Mathewson located?

Gretchen Mathewson practices at 5 East 98th Street Box 1138, New York, NY 10029. The listed phone number is (212) 241-6854.

What is Gretchen Mathewson's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Gretchen Mathewson enrolled in Medicare?

Yes. Gretchen Mathewson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Gretchen Mathewson affiliated with any hospitals?

According to CMS data, Gretchen Mathewson is affiliated with Mount Sinai Hospital and Mount Sinai Beth Israel.

When was this NPI record last updated?

The NPPES record for Gretchen Mathewson was last updated on October 25, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.