1. Home
  2. Directory
  3. Connecticut
  4. New Haven
  5. Pediatrics
  6. NPI Profile

DR. STEPHAN SIEBEL
NPI 1174720957
Pediatrics - Pediatric Endocrinology in New Haven, CT

Active since June 27, 2007PECOS Enrolled
330 CEDAR ST # 3103, NEW HAVEN, CT 06510(252) 847-4268 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2022, Mar 17, 2018, Jul 13, 2017 (3 updates tracked since 2017).

About Dr. Stephan Siebel NPPES

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

DR. STEPHAN SIEBEL (NPI 1174720957) is an individual pediatric endocrinology provider in New Haven, Connecticut, licensed in Connecticut (56574) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS and maintains a secondary practice location in Greenville.

NPPES Registry Identity

NPI1174720957
Entity TypeIndividualMale
Primary Taxonomy2080P0205X
Provider Legal NameDR. STEPHAN SIEBEL
Location Address330 CEDAR ST # 3103New Haven, CT 06510-3218
Mailing Address330 Cedar St # 3103New Haven, CT 06510-3218 · (252) 847-4268
Phone(252) 847-4268
Sole ProprietorNo
Enumeration DateJune 27, 2007
Last NPPES UpdateJuly 21, 20223 updates tracked since enumeration
✔ NPI 1174720957 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric EndocrinologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0205X
License✔ Licensed in CT · 56574
Definition
A pediatrician who provides expert care to infants, children and adolescents who have diseases that result from an abnormality in the endocrine glands (glands which secrete hormones). These diseases include diabetes mellitus, growth failure, unusual size for age, early or late pubertal development, birth defects, the genital region and disorders of the thyroid, the adrenal and pituitary glands.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
330 CEDAR ST # 3103, New Haven, CT 06510
Open in Google Maps ↗

Secondary Practice Location 1

Location 12100 Stantonsburg Rd, PCMH Graduate Medical EducationGreenville, NC 27834-2818 · Phone (252) 847-4268

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Stephan Siebel 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 Stephan Siebel reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Yale University
0.3 mi
Advanced Practice Midwife
100 CHURCH ST S STE 200, YALE SCHOOL OF NURSING
New Haven, CT 06519
  • Reassigned Medicare billing, Connecticut enrollment
  • 3,728 clinicians in this Medicare group
NPI 1124148887 (203) 737-5432

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06510 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 Stephan Siebel's NPI number?

The NPI number for Stephan Siebel is 1174720957. It was assigned to this individual provider in the NPPES registry on June 27, 2007.

Where is Stephan Siebel located?

Stephan Siebel practices at 330 Cedar St # 3103, New Haven, CT 06510. The listed phone number is (252) 847-4268.

What is Stephan Siebel's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Endocrinology, with taxonomy code 2080P0205X.

Is Stephan Siebel enrolled in Medicare?

Yes. Stephan Siebel is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Stephan Siebel's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephan Siebel reassigns Medicare benefits to Yale University (New Haven, CT). 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 Stephan Siebel's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Stephan Siebel accept?

Health plans from Anthem Blue Cross and Blue Shield list Stephan Siebel as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Stephan Siebel was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.