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Dr. Preston R. Simpson, MD
NPI1265453021
- Medicare services, 2021
- 1,146
- Publications
- 2
- Industry payments
- $11
- Insurance carriers
- 13
- State licenses
- 2
- Practice address
- 1303 E Herndon Ave, Fresno, CA 93720
- Practice phone
- Call (559) 449-5360
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Simpson'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. Preston R. Simpson is a clinical pathology/laboratory medicine physician in Fresno, California
Dr. Simpson practices in Fresno, California.
Dr. Simpson's NPI, 1265453021, was assigned on July 21, 2006. Dr. Simpson graduated from Vanderbilt University School Of Medicine in 1979. Dr. Simpson's California license number on file is G58006.
NPI and contact details
- NPI
- 1265453021NPI Registry (opens in a new tab)
- NPI enumeration date
- July 21, 2006
- NPI status
- Active
- Practice phone
- (559) 449-5360
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Preston R. Simpson's practice address is in Fresno, California
Dr. Simpson's practice address in the NPI Registry is 1303 E Herndon Ave, Fresno, CA 93720. The practice phone is (559) 449-5360.
- NPI Registry address1303 E Herndon Ave, Fresno, CA 93720Phone(559) 449-5360
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Preston R. Simpson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simpson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Simpson's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Preston R. Simpson is one of 96 clinical pathology/laboratory medicine physicians in California
Clinical pathology/laboratory medicine is Dr. Simpson's primary specialty in the NPI Registry, under taxonomy code 207ZP0105X. Dr. Simpson is board certified in anatomic pathology & clinical pathology by the American Board of Pathology. Dmand AI has Dr. Simpson's licenses on file in 2 states: California and Texas.
Specialties and state licenses
- Clinical pathology/laboratory medicine, CaliforniaPrimary
- Texas license
Clinical pathology/laboratory medicine physicians near Dr. Simpson
Counts of clinical pathology/laboratory medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
96clinical pathology/laboratory medicine physicians in California
4clinical pathology/laboratory medicine physicians in Fresno
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Preston R. Simpson billed Medicare for 1,146 services in 2021
CMS data shows 1,146 Medicare services from Dr. Simpson across 19 procedure codes in 2021. Medicare paid $30,562 for them.
Medicare services, 20211,146
Paid by Medicare$30,562
Procedure codes19
Dr. Simpson's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Lab and pathology
- 2020: 9362021: 1,13221%
- Other services
- 2020: 182021: 1422%
Where Dr. Simpson's Medicare services took place, 2021
- In an office182%
- In a facility1,12898%
Dr. Simpson compared with the California median for clinical pathology/laboratory medicine physicians, 2021
- Dr. Simpson
- California median
- Medicare services
- 1,146vs 4142.8 times
Medians across 61 clinical pathology/laboratory medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Simpson's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Simpson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Simpson and other clinical pathology/laboratory medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
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Dr. Preston R. Simpson has 2 publications on record
Dmand AI links 2 papers to Dr. Simpson. Dr. Simpson's most frequent co-authors are Angelica Oviedo, MD, David M.d. Schwartz, MD and Jaclyn Christine Watkins, MD, MS.
Papers2
Dr. Simpson's most frequent co-authors
- Angelica Oviedo, MD1 shared paper
- David M.d. Schwartz, MD1 shared paper
- Jaclyn Christine Watkins, MD, MS1 shared paper
Recent publications by Dr. Simpson
See who Dr. Simpson researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Simpson works with, so you can find a warm path to the right clinical pathology/laboratory medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Preston R. Simpson received $11 in industry payments in 2019
CMS Open Payments shows 1 general payment to Dr. Simpson from 1 drug or device company in 2019. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $11.
Companies that paid Dr. Simpson the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Preston R. Simpson graduated from Vanderbilt University School Of Medicine
Dr. Simpson graduated from Vanderbilt University School Of Medicine in 1979.
- Medical school
- Board certified in anatomic pathology & clinical pathology
- Board certified in cytopathology
Source: Dmand AI Professional Profile Data
Dr. Preston R. Simpson accepts plans from 13 insurance carriers
Dr. Simpson is in network with 13 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Alliant Health Plans
- Elevance
- HCSC
- Baylor Scott and White
- Blue Cross and Blue Shield of Kansas City
- +5 more carriersWith a free account
Plan types Dr. Simpson accepts, by number of carriers
- HMO9
- PPO8
- POS4
- EPO2
- Medicare2
Source: Dmand AI Insurance Network Data
Sources for Dr. Preston R. Simpson'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice 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 |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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. Preston R. Simpson
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. Preston R. Simpson's NPI number?
Dr. Preston R. Simpson's NPI number is 1265453021. It was assigned on July 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Preston R. Simpson?
Dr. Preston R. Simpson is a clinical pathology/laboratory medicine physician in Fresno, California. The primary specialty in the NPI Registry is Clinical Pathology/Laboratory Medicine Physician (taxonomy code 207ZP0105X).
Where does Dr. Preston R. Simpson practice?
Dr. Simpson practices at 1303 E Herndon Ave, Fresno, CA 93720.
What is Dr. Preston R. Simpson's office phone number?
The practice phone on file for Dr. Simpson is (559) 449-5360.
What is Dr. Preston R. Simpson's medical license number?
Dr. Simpson's California license number on file is G58006, one of the licenses on file in 2 states.
Which states has Dr. Preston R. Simpson been licensed in?
Dmand AI has state licenses on file for Dr. Simpson in California (1986 to 2025) and Texas (1980 to 2025).
Does Dr. Preston R. Simpson accept Medicare?
Yes. CMS data shows Dr. Simpson billed Medicare for 1,146 services in 2021.
Is Dr. Preston R. Simpson board certified?
Yes. Dr. Simpson is board certified in anatomic pathology & clinical pathology by the American Board of Pathology.
What services does Dr. Preston R. Simpson bill to Medicare?
In 2021, Dr. Simpson's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88341) and lab and pathology test (88342).
Where did Dr. Preston R. Simpson go to medical school?
Dr. Simpson graduated from Vanderbilt University School Of Medicine in 1979.
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Has Dr. Preston R. Simpson received payments from drug or device companies?
CMS Open Payments shows $11 in general payments to Dr. Simpson from 1 company from 2019 to 2019. The largest total came from Abbott Laboratories.
How long has Dr. Preston R. Simpson been practicing?
Dr. Simpson graduated from medical school in 1979, 47 years ago.
Does Dr. Preston R. Simpson do research?
Dmand AI links 2 publications to Dr. Simpson.
Who does Dr. Preston R. Simpson publish with?
Dr. Simpson's most frequent co-authors are Angelica Oviedo, MD (1 shared paper), David M.d. Schwartz, MD (1 shared paper) and Jaclyn Christine Watkins, MD, MS (1 shared paper).
What insurance does Dr. Preston R. Simpson accept?
Dr. Simpson is in network with 13 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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