Physician Profile
Unclaimed ProfileAbout WARREN
Based in Ann Arbor, MI, Simon John Warren, MD is listed in the NPI registry under pathology. Simon is also listed as specialising in specialist and anatomic & clinical pathology.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What is Dr. Warren's specialty?
Dr. Warren is a pathology in Ann Arbor, MI. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “PATHOLOGY”.
NPI registry
Where can I find Dr. Warren?
Dr. Warren is listed at 1500 E MEDICAL CENTER DR, Ann Arbor, MI 48109. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Warren?
The number on file is (734) 936-4000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Warren's NPI number?
Dr. Warren's National Provider Identifier is 1407828684. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Warren's medical education?
Dr. Warren attended Other, graduating in 1993. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Warren been practising?
Dr. Warren has 33 years experience. Calculated from a graduation year of 1993, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Warren known for?
According to Medicare billing data, Dr. Warren the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Warren confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Warren. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (734) 936-4000
- Email not available
Practice Locations
1500 E MEDICAL CENTER DR
Ann Arbor, MI 48109
Procedures Most Often Billed to Medicare
830 services · 575 patients · 6 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Pathology examination of tissue using a microscope, intermediate complexity | Lab test | 88305 |
616 |
| Special stained specimen slides to examine tissue, each additional procedure | Lab test | 88341 |
95 |
| Special stained specimen slides to examine tissue, initial procedure | Lab test | 88342 |
59 |
| Pathology examination of tissue using a microscope, moderately low complexity | Lab test | 88304 |
24 |
| Surgical pathology consultation and report on referred slides prepared elsewhere | Lab test | 88321 |
21 |
| Surgical pathology consultation and report on referred slides prepared elsewhere | Lab test | 88321 |
15 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other pathology specialists at this location 2
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other pathology specialists in Ann Arbor 6
Same specialty, same city.
More connections — 15 related providers in 2 groups
Trained at Other 7
Other providers in the same specialty who trained at the same institution.
Class of 1993 at Other 8
Providers who graduated from the same medical school in the same year.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.