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

ALEXA J. SIDDON M.D.
NPI 1720240302
Pathology - Anatomic Pathology & Clinical Pathology in New Haven, CT

Active since June 25, 2008PECOS EnrolledAccepts Medicare Assignment
73.56/100
CMS Quality Rating
20 YORK ST, T-209, NEW HAVEN, CT 06510(203) 688-2259(203) 688-5599 Get Directions Write a Review

NPPES record last updated: August 29, 2013. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Alexa J. Siddon M.d. NPPES

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

ALEXA J. SIDDON M.D. (NPI 1720240302) is an individual anatomic pathology & clinical pathology provider in New Haven, Connecticut, licensed in Connecticut (050417) and active in the NPI registry since June 2008. She is enrolled in Medicare PECOS, is affiliated with Westerly Hospital, and is a graduate of Other (2008).

NPPES Registry Identity

NPI1720240302
Entity TypeIndividualFemale
Primary Taxonomy207ZP0102X
Provider Legal NameALEXA J. SIDDONCredential: M.D.
Location Address20 YORK ST, T-209New Haven, CT 06510-3220
Mailing Address20 York St, T-209New Haven, CT 06510-3220 · (203) 688-2259 · Fax (203) 688-5599
Phone(203) 688-2259
Fax(203) 688-5599
Sole ProprietorYes
Medical School CMSOtherGraduated 2008
Enumeration DateJune 25, 2008
Last NPPES UpdateAugust 29, 2013
✔ NPI 1720240302 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in CT · 050417
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
20 YORK ST, New Haven, CT 06510
Open in Google Maps ↗

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

Alexa J. Siddon M.d. 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 ID7719112804
PECOS Enrollment IDI20131025000990
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 14

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.

Coagulation function screening test with interpretation and report 85390
A coagulation function screening test is a type of blood test that checks how well your blood clots. It's important because clotting helps prevent excessive bleeding. The test results are interpreted and a report is provided to help guide your doctor's treatment plan.
502 services325 patients
Molecular pathology procedure; physician interpretation and report G0452
A molecular pathology procedure involves analyzing your body's cells at a molecular level to identify any abnormalities. This can help detect diseases early. A physician will interpret the results and provide a detailed report, explaining the findings clearly.
310 services220 patients
Flow cytometry technique for dna or cell analysis, 16 or more markers 88189
Flow cytometry is a method used to measure and analyze cells. It uses a beam of light to detect up to 16 or more markers on cells, helping to identify their type, function, or abnormalities. This technique aids in diagnosing various health conditions.
267 services242 patients
Flow cytometry technique for dna or cell analysis, 9 to 15 markers 88188
Flow cytometry is a technique used to measure physical and chemical characteristics of cells or particles. It can analyze multiple markers (9 to 15) on a cell, helping to identify its type and function. This process can also examine DNA within cells for any abnormalities.
174 services152 patients
Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
132 services36 patients
Flow cytometry technique for dna or cell analysis, 2 to 8 markers 88187
Flow cytometry is a technique that helps analyze your cells and DNA. It uses lasers to identify and sort cells based on their properties, marked by up to 8 different markers. This helps in diagnosing and monitoring various health conditions.
95 services75 patients

Hospital Affiliations CMS Care Compare

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

Westerly Hospital

Acute Care Hospitals · Westerly, RI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number410013
Location25 Wells StreetWesterly, RI 02891 · Washington County
Emergency services

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

73.56/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality75.84
Promoting Interoperability74
Improvement Activities40
Cost51.43

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.

AUDREY P SENIOR APRN
Nurse Practitioner (Family)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-5860
DR. YEISID F FIGUEREDO M.D.
Pediatrics (Neonatal-Perinatal Medicine)
20 YORK ST, DEPT OF NEONATOLOGY
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-2320
YALE NEW HAVEN HOSPITAL
Durable Medical Equipment & Medical Supplies (Customized Equipment)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-2046
TAYLOR KINGSTON
Dietitian, Registered
20 YORK ST, FOOD AND NUTRITION EPB806
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-9185
DR. TRAVIS DANIEL BONTRAGER MD
Hospitalist
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-1734
NEEHARIKA THOTTEMPUDI MBBS
Psychiatry & Neurology (Neurology)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4242
TERESA JOSEPH D.O.
Internal Medicine (Nephrology)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 737-8894
MR. BRAD ST. MARTIN MD
Obstetrics & Gynecology
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4242

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 Alexa Siddon's NPI number?

The NPI number for Alexa Siddon is 1720240302. It was assigned to this individual provider in the NPPES registry on June 25, 2008.

Where is Alexa Siddon located?

Alexa Siddon practices at 20 York St T-209, New Haven, CT 06510. The listed phone number is (203) 688-2259.

What is Alexa Siddon's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Alexa Siddon enrolled in Medicare?

Yes. Alexa Siddon 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 Alexa Siddon affiliated with any hospitals?

According to CMS data, Alexa Siddon is affiliated with Westerly Hospital.

When was this NPI record last updated?

The NPPES record for Alexa Siddon was last updated on August 29, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.