Steve Mertens, MD
NPI 1124034814 · Clinical Pathology/Laboratory Medicine Physician · Sebastopol, CA
Enrolled with Medicare as Order and Referring Only - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steve Mertens, MD is a Clinical Pathology/Laboratory Medicine Physician provider in Sebastopol, CA (NPI 1124034814).
Provider details
- NPI number
- 1124034814
- Entity type
- Individual
- Primary specialty
- Clinical Pathology/Laboratory Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G56930 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-01
- Last updated
- 2007-10-28
Frequently asked questions
- What is Steve Mertens's NPI number?
- Steve Mertens's National Provider Identifier (NPI) is 1124034814, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steve Mertens's specialty?
- Steve Mertens is listed in the NPPES registry with a primary specialty of Clinical Pathology/Laboratory Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Steve Mertens located?
- Steve Mertens's practice location on file with NPPES is 400 Morris Street, Sebastopol, CA 95472.
- What is Steve Mertens's phone number?
- The practice phone number listed in the NPPES registry for Steve Mertens is (707) 829-5883.
- Does Steve Mertens accept Medicare?
- Steve Mertens is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steve Mertens's NPI active?
- Yes — Steve Mertens's NPI (1124034814) is active in the NPPES registry as of the last update on 2007-10-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.