Alexa Siddon, M.D.
NPI 1720240302 · Anatomic Pathology & Clinical Pathology Physician · New Haven, CT
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexa Siddon, M.D. is a Anatomic Pathology & Clinical Pathology Physician provider in New Haven, CT (NPI 1720240302).
Provider details
- NPI number
- 1720240302
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 050417 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,893 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Coagulation Function Screening Test With Interpretation and Report85390 | 502 | $36 |
| Molecular Pathology Procedure; Physician Interpretation and ReportG0452 | 310 | $47 |
| Flow Cytometry Technique for Dna Or Cell Analysis, 16 Or More Markers88189 | 267 | $84 |
| Flow Cytometry Technique for Dna Or Cell Analysis, 9 to 15 Markers88188 | 174 | $62 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 132 | $28 |
| Flow Cytometry Technique for Dna Or Cell Analysis, 2 to 8 Markers88187 | 95 | $36 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-06-25
- Last updated
- 2013-08-29
Frequently asked questions
- What is Alexa Siddon's NPI number?
- Alexa Siddon's National Provider Identifier (NPI) is 1720240302, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexa Siddon's specialty?
- Alexa Siddon is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Alexa Siddon located?
- Alexa Siddon's practice location on file with NPPES is 20 York St, New Haven, CT 06510-3220.
- What is Alexa Siddon's phone number?
- The practice phone number listed in the NPPES registry for Alexa Siddon is (203) 688-2259.
- Does Alexa Siddon accept Medicare?
- Alexa Siddon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexa Siddon's NPI active?
- Yes — Alexa Siddon's NPI (1720240302) is active in the NPPES registry as of the last update on 2013-08-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.