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DR. MARIA S. GUOTH MD
NPI 1356386965
Internal Medicine - Endocrinology, Diabetes & Metabolism in Greenwich, CT

Active since June 18, 2006PECOS EnrolledCLIA 07D0987668 · Waiver
420 TACONIC RD, GREENWICH, CT 06831(203) 625-7646 Get Directions Write a Review

NPPES record last updated: June 26, 2016. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Maria S. Guoth Md NPPES

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

DR. MARIA S. GUOTH MD (NPI 1356386965) is an individual endocrinology, diabetes & metabolism provider in Greenwich, Connecticut, licensed in Connecticut (033532) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS and holds a CLIA Waiver certificate valid through June 10, 2027.

NPPES Registry Identity

NPI1356386965
Entity TypeIndividualFemale
Primary Taxonomy207RE0101X
Provider Legal NameDR. MARIA S. GUOTHCredential: MD
Location Address420 TACONIC RDGreenwich, CT 06831-2850
Mailing Address420 Taconic RdGreenwich, CT 06831-2850 · (203) 625-7646
Phone(203) 625-7646
Sole ProprietorYes
Enumeration DateJune 18, 2006
Last NPPES UpdateJune 26, 2016
✔ NPI 1356386965 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 CT · 033532
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.
420 TACONIC RD, Greenwich, CT 06831
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Other Identifiers 3

Medicare PIN110007929CT
Other061575302CT · Fed Tin
Medicare UPING50600CT

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Maria S. Guoth Md 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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 07D0987668

Maria S Guoth MD · Greenwich, CT
Active · expires Jun 10, 2027
CLIA Number07D0987668
Laboratory TypePhysician Office
Certificate Effective DateJune 11, 2025
Certificate Expiration DateJune 10, 2027
Laboratory DirectorMaria S. Guoth MD
Laboratory Phone(203) 395-2723
Laboratory LocationMaria S Guoth MD420 Taconic Rd, Greenwich, CT 06831
CLIA data matches this NPI record on: Address
This certificate is issued to a laboratory to perform only waived tests.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06831 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
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
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 Maria Guoth's NPI number?

The NPI number for Maria Guoth is 1356386965. It was assigned to this individual provider in the NPPES registry on June 18, 2006.

Where is Maria Guoth located?

Maria Guoth practices at 420 Taconic Rd, Greenwich, CT 06831. The listed phone number is (203) 625-7646.

What is Maria Guoth's specialty?

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

Is Maria Guoth enrolled in Medicare?

Yes. Maria Guoth is registered in the Medicare PECOS enrollment system.

Does Maria Guoth hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 07D0987668) is associated with this NPI, valid through June 10, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Maria Guoth was last updated on June 26, 2016. NPI Profile syncs with the weekly NPPES data releases published by CMS.