Simon Warren, MD
NPI 1407828684 · Dermatopathology (Pathology) Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Simon Warren, MD is a Dermatopathology (Pathology) Physician provider in Ann Arbor, MI (NPI 1407828684).
Provider details
- NPI number
- 1407828684
- Entity type
- Individual
- Primary specialty
- Dermatopathology (Pathology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- ME93737 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
830 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 | 616 | $35 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 95 | $26 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 59 | $32 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 24 | $10 |
| Surgical Pathology Consultation and Report on Referred Slides Prepared Elsewhere88321 | 21 | $82 |
| Surgical Pathology Consultation and Report on Referred Slides Prepared Elsewhere88321 | 15 | $76 |
Practice location
Mailing address
Additional practice locations (1)
- 635 Barnhill Dr # A128Indianapolis, IN 46202-5126Phone: (317) 274-4806
Registry dates
- Enumerated
- 2006-02-02
- Last updated
- 2024-10-15
- Certified
- 2024-10-15
Frequently asked questions
- What is Simon Warren's NPI number?
- Simon Warren's National Provider Identifier (NPI) is 1407828684, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Simon Warren's specialty?
- Simon Warren is listed in the NPPES registry with a primary specialty of Dermatopathology (Pathology) Physician (Allopathic & Osteopathic Physicians).
- Where is Simon Warren located?
- Simon Warren's practice location on file with NPPES is 1500 E Medical Center Dr, Ann Arbor, MI 48109-5000.
- What is Simon Warren's phone number?
- The practice phone number listed in the NPPES registry for Simon Warren is (734) 936-4000.
- Does Simon Warren accept Medicare?
- Simon Warren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Simon Warren's NPI active?
- Yes — Simon Warren's NPI (1407828684) is active in the NPPES registry as of the last update on 2024-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.