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Dr. Gail A. Simpson, MD
NPI1245260702
- Medicare services, 2022
- 17
- Part D claims, 2024
- 13
- Publications
- 1
- Industry payments
- $274
- Affiliated sites
- 1
- Practice address
- 888 S Hill Rd, Ventura, CA 93003-8400
- Practice phone
- Call (805) 477-6464
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ventura Medical Management
Multi-specialty group site · Ventura, California
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. Gail A. Simpson is an internist in Ventura, California
Dr. Simpson practices at Ventura Medical Management in Ventura, California.
Dr. Simpson's NPI, 1245260702, was assigned on July 3, 2006. Dr. Simpson graduated from Medical College Of Wisconsin in 1985. Dr. Simpson holds California license G58912.
NPI and contact details
- NPI
- 1245260702NPI Registry (opens in a new tab)
- NPI enumeration date
- July 3, 2006
- NPI status
- Active
- Practice phone
- (805) 477-6464
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gail A. Simpson practices at 2 locations in Ventura, California
Dr. Simpson's primary practice is Ventura Medical Management, at 888 S Hill Rd, Ventura, CA 93003-8400. The practice phone is (805) 477-6464. The NPI Registry lists Dr. Simpson's practice address as 147 N Brent St, Ventura, CA 93003.
- Ventura Medical ManagementPrimary888 S Hill Rd, Ventura, CA 93003-8400Phone(805) 477-6464
- NPI Registry address147 N Brent St, Ventura, CA 93003 · Ventura CountyPhone(805) 477-6464
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Gail A. Simpson is affiliated with 1 site of care and 1 medical group
Dr. Simpson's primary practice is Ventura Medical Management in Ventura, California. Dmand AI also links Dr. Simpson to 1 medical group, named with a free account.
Ventura Medical ManagementPrimary
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Gail A. 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 |
|---|---|
| Ventura Medical Management | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gail A. Simpson is one of 16,751 internists in California
Internal medicine is Dr. Simpson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Simpson is board certified in internal medicine by the American Board of Internal Medicine. Dr. Simpson is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Simpson
Counts of internists 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. Gail A. Simpson billed Medicare for 17 services in 2022
CMS data shows 17 Medicare services from Dr. Simpson across 1 procedure code in 2022, all of them office visits. Medicare paid $1,165 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202217
Paid by Medicare$1,165
Procedure codes1
Dr. Simpson's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 1332022: 1787%
Dr. Simpson compared with the California median for internists, 2022
- Dr. Simpson
- California median
- Medicare services
- 17vs 36195% below
- Part D claims
- 137vs 42167% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Simpson's most billed Medicare procedure codes, 2022
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 internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gail A. Simpson's patients have a median age of 64
Across all payers, Dmand AI patient panel data puts Dr. Simpson's median patient age at 64, with 49% women.
Dr. Simpson'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
- Women49%
- Men51%
Source: Dmand AI Patient Panel Data
Dr. Gail A. Simpson wrote 13 Medicare Part D claims in 2024
In 2024, Dr. Simpson wrote 13 Medicare Part D claims. 92% of them were for generic drugs. They cover 8 drugs, with $61,858 in total drug cost. In 2021, CMS named 184 claims across 11 drugs.
Part D claims, 202413
Drugs named by CMS8
Total drug cost$61,858
Dr. Simpson's Part D claims by kind of drug, 2024
- Generic12 claims92%
- Brand-name and other1 claims8%
Dr. Simpson's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 1842022: 13726%
Drugs named by CMS: 8 in 2022, 11 in 2021.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Gail A. Simpson has 1 publication on record
Dmand AI links 1 paper to Dr. Simpson. Dr. Simpson's most frequent co-authors are Alpesh Navin Amin, MD, Charles Christopher Bailey, MD and Chester Choi, MD.
Papers1
Dr. Simpson's most frequent co-authors
- Alpesh Navin Amin, MD1 shared paper
- Charles Christopher Bailey, MD1 shared paper
- Chester Choi, MD1 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 internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gail A. Simpson received $274 in industry payments from 2016 to 2025
CMS Open Payments shows 6 general payments to Dr. Simpson from 6 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 91% of the total. Janssen Pharmaceuticals, Inc paid the most, $119.
General payments to Dr. Simpson by program year, 2016 to 2025
General payments to Dr. Simpson by kind, 2016 to 2025
$274in total
- Food and beverage$24991%
- Education$259%
Companies that paid Dr. Simpson the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gail A. Simpson graduated from Medical College Of Wisconsin
Dr. Simpson graduated from Medical College Of Wisconsin in 1985.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Gail A. Simpson accepts plans from 8 insurance carriers
Dr. Simpson is in network with 8 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Aspirus Health Plan
- Blue Cross and Blue Shield of Kansas City
Plan types Dr. Simpson accepts, by number of carriers
- Medicare6
- PPO6
- POS4
- HMO3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Gail A. 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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| 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. Gail A. 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. Gail A. Simpson's NPI number?
Dr. Gail A. Simpson's NPI number is 1245260702. It was assigned on July 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gail A. Simpson?
Dr. Gail A. Simpson is an internist in Ventura, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gail A. Simpson practice?
Dr. Simpson practices at 888 S Hill Rd, Ventura, CA 93003-8400. Dr. Simpson also practices at 147 N Brent St, Ventura, CA 93003. Dr. Simpson's primary practice is Ventura Medical Management in Ventura, California. Dmand AI also links Dr. Simpson to 1 medical group.
What is Dr. Gail A. Simpson's office phone number?
The practice phone on file for Dr. Simpson is (805) 477-6464.
What is Dr. Gail A. Simpson's medical license number?
Dr. Simpson holds California license G58912.
Does Dr. Gail A. Simpson accept Medicare?
Yes. CMS data shows Dr. Simpson billed Medicare for 17 services in 2022.
Is Dr. Gail A. Simpson board certified?
Yes. Dr. Simpson is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Gail A. Simpson bill to Medicare?
In 2022, Dr. Simpson's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Gail A. Simpson go to medical school?
Dr. Simpson graduated from Medical College Of Wisconsin in 1985.
What drugs does Dr. Gail A. Simpson prescribe most?
In 2022 Medicare Part D data, Dr. Simpson's most prescribed drugs by claims were Azithromycin, Rifampin and Fluconazole.
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Has Dr. Gail A. Simpson received payments from drug or device companies?
CMS Open Payments shows $274 in general payments to Dr. Simpson from 6 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Gail A. Simpson been practicing?
Dr. Simpson graduated from medical school in 1985, 41 years ago.
Does Dr. Gail A. Simpson do research?
Dmand AI links 1 publication to Dr. Simpson.
Who does Dr. Gail A. Simpson publish with?
Dr. Simpson's most frequent co-authors are Alpesh Navin Amin, MD (1 shared paper), Charles Christopher Bailey, MD (1 shared paper) and Chester Choi, MD (1 shared paper).
What insurance does Dr. Gail A. Simpson accept?
Dr. Simpson is in network with 8 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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