Steven Chirieleison, MD, PHD
NPI 1801358684 · Anatomic Pathology & Clinical Pathology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steven Chirieleison, MD, PHD is a Anatomic Pathology & Clinical Pathology Physician provider in Stanford, CA (NPI 1801358684).
Provider details
- NPI number
- 1801358684
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- A178354 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
879 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 643 | $42 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 77 | $39 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 64 | $31 |
| Evaluation of Fine Needle Aspirate With Interpretation and Report88173 | 38 | $79 |
| Special Stained Specimen Slides to Identify Organisms Including Interpretation and Report88312 | 26 | $30 |
| Evaluation of Fine Needle Aspirate88172 | 16 | $40 |
Practice location
Mailing address
Additional practice locations (1)
- 725 Welch RdPalo Alto, CA 94304-1601Phone: (650) 497-8000
Registry dates
- Enumerated
- 2019-04-02
- Last updated
- 2025-07-01
- Certified
- 2025-07-01
Frequently asked questions
- What is Steven Chirieleison's NPI number?
- Steven Chirieleison's National Provider Identifier (NPI) is 1801358684, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Chirieleison's specialty?
- Steven Chirieleison is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Steven Chirieleison located?
- Steven Chirieleison's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Steven Chirieleison's phone number?
- The practice phone number listed in the NPPES registry for Steven Chirieleison is (650) 723-4000.
- Does Steven Chirieleison accept Medicare?
- Steven Chirieleison is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steven Chirieleison's NPI active?
- Yes — Steven Chirieleison's NPI (1801358684) is active in the NPPES registry as of the last update on 2025-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.