Dr. Simon John Warren, MD
- Medicare services, 2024
- 830
- Medicare patients, 2024
- 509
- MIPS score, 2024
- 100
- Hospital affiliations
- 4
- Industry payments
- $259
- Practice address
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Practice phone
- Call (734) 936-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Hospital
School-Based Health Center · Ann Arbor, Michigan
Find Dr. Warren's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Simon John Warren is a dermatopathology (pathology) physician in Ann Arbor, Michigan
Dr. Warren practices at University Hospital in Ann Arbor, Michigan.
Dr. Warren's NPI, 1407828684, was assigned on February 2, 2006. Dr. Warren holds Michigan license 4301512285.
- NPI
- 1407828684NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587680848
- NPI enumeration date
- February 2, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (734) 936-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Simon John Warren practices at University Hospital in Ann Arbor, Michigan
Dr. Warren's primary practice is University Hospital, at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The practice phone is (734) 936-4000.
- University Hospital1500 E Medical Center Dr, Ann Arbor, MI 48109Phone(734) 936-4000
Source: Dmand AI Affiliation Data
Dr. Simon John Warren is affiliated with 6 sites of care and 2 medical groups
Dr. Warren's primary practice is University Hospital in Ann Arbor, Michigan. Dr. Warren is also affiliated with University Hospital. The medical group on file is University of Michigan Health. Dmand AI also links Dr. Warren to 3 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account. Dr. Warren's employer is on file too: a school & student health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Simon John Warren's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Warren practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Hospital | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Simon John Warren is one of 11 dermatopathology (pathology) physicians in Michigan
Pathology is Dr. Warren's primary specialty in the NPI Registry, under taxonomy code 207ZD0900X. The record also lists dermatopathology. Dmand AI has Dr. Warren's licenses on file in 3 states: Michigan, Florida and Indiana.
Specialties and state licenses
- Dermatopathology (pathology), MichiganPrimary
- Specialist, Florida
- Anatomic pathology and clinical pathology, Indiana
Dermatopathology (pathology) physicians near Dr. Warren
Counts of dermatopathology (pathology) physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Simon John Warren billed Medicare for 830 services in 2024
CMS data shows 830 Medicare services from Dr. Warren across 5 procedure codes in 2024, for 509 Medicare patients. Medicare paid $22,262 for them.
Dr. Warren's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 1,5062024: 83045%
Where Dr. Warren's Medicare services took place, 2024
- In an office152%
- In a facility81598%
Dr. Warren compared with the Michigan median for dermatopathology (pathology) physicians, 2024
- Dr. Warren
- Michigan median
- Medicare services
- 830vs 97615% below
Medians across 12 dermatopathology (pathology) physicians in Michigan with Dmand AI profiles that report each measure.
Dr. Warren's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Warren and other dermatopathology (pathology) physicians in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Simon John Warren treated 509 Medicare patients in 2024, average age 75
CMS counts 509 Medicare patients who saw Dr. Warren in 2024. The largest group is 65 to 74, with 234 patients. 74% of them have high blood pressure, and 73% have high cholesterol. 6% are also on Medicaid. Their average risk score is 1.21, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Warren's median patient age at 64, with 51% women.
Dr. Warren's Medicare patients by age, 2024
Dr. Warren's Medicare patients by sex, 2024
- Women22043%
- Men28957%
Chronic conditions among Dr. Warren's Medicare patients, 2024
- High blood pressure74%
- High cholesterol73%
- Arthritis42%
- Chronic kidney disease27%
- Diabetes27%
- Ischemic heart disease27%
- Anxiety21%
- Mood disorders20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Warren's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Simon John Warren scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Warren for performance year 2024, reported through an alternative payment model (APM). Dr. Warren accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Warren's MIPS scores, performance year 2024
- 100of 100Final score
- 85.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Simon John Warren received $259 in industry payments from 2017 to 2023
CMS Open Payments shows 2 general payments to Dr. Warren from 2 drug and device companies from 2017 to 2023. Food and beverage make up the largest share, 100% of the total. Agilent Technologies, Inc. paid the most, $134.
General payments to Dr. Warren by program year, 2017 to 2023
Companies that paid Dr. Warren the most, 2017 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Simon John Warren's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Simon John Warren
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Simon John Warren's NPI number?
Dr. Simon John Warren's NPI number is 1407828684. It was assigned on February 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Simon John Warren?
Dr. Simon John Warren is a dermatopathology (pathology) physician in Ann Arbor, Michigan. The primary specialty in the NPI Registry is Dermatopathology (Pathology) Physician (taxonomy code 207ZD0900X).
Where does Dr. Simon John Warren practice?
Dr. Warren practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. Dr. Warren's primary practice is University Hospital in Ann Arbor, Michigan. Dmand AI also links Dr. Warren to 3 hospitals, 1 group practice or clinic and 1 medical group.
What is Dr. Simon John Warren's office phone number?
The practice phone on file for Dr. Warren is (734) 936-4000.
What is Dr. Simon John Warren's medical license number?
Dr. Warren holds Michigan license 4301512285, one of the licenses on file in 3 states.
Which states has Dr. Simon John Warren been licensed in?
Dmand AI has state licenses on file for Dr. Warren in Michigan, Florida and Indiana.
Which hospitals is Dr. Simon John Warren affiliated with?
Dr. Warren is affiliated with University Hospital. Dmand AI links Dr. Warren to 3 more hospitals.
What medical group is Dr. Simon John Warren part of?
Dr. Warren is linked to University of Michigan Health. Dmand AI links Dr. Warren to 1 more medical group.
Does Dr. Simon John Warren accept Medicare?
Yes. CMS data shows Dr. Warren billed Medicare for 830 services in 2024, and Dr. Warren accepts Medicare assignment.
What is Dr. Simon John Warren's MIPS score?
Dr. Warren's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
Show 4 more questionsShow fewer questions
How many Medicare patients does Dr. Simon John Warren see?
CMS counts 509 Medicare patients who saw Dr. Warren in 2024, with an average age of 75.
What services does Dr. Simon John Warren bill to Medicare?
In 2024, Dr. Warren's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88341) and lab and pathology test (88342).
Has Dr. Simon John Warren received payments from drug or device companies?
CMS Open Payments shows $259 in general payments to Dr. Warren from 2 companies from 2017 to 2023. The largest total came from Agilent Technologies, Inc.
How long has Dr. Simon John Warren been practicing?
Dr. Warren graduated from medical school in 1993, 33 years ago.
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