Dr. Derek Joseph Gee, MD
- Medicare services, 2024
- 41
- Medicare patients, 2024
- 114
- Hospital affiliations
- 1
- Industry payments
- $185
- Medical groups
- 3
- Practice address
- 1200 B Gale Wilson Blvd, Fairfield, CA 94533
- Practice phone
- Call (707) 646-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gee'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. Derek Joseph Gee is an anesthesiologist in Fairfield, California
Dr. Gee practices at NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare.
Dr. Gee's NPI, 1104926773, was assigned on September 24, 2006. Dr. Gee graduated from American University of the Caribbean School of Medicine in 2001. Dr. Gee holds California license A92328.
- NPI
- 1104926773NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890854517
- NPI enumeration date
- September 24, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 646-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Derek Joseph Gee practices at NorthBay Medical Center in Fairfield, California
Dr. Gee's primary practice is NorthBay Medical Center, at 1200 B Gale Wilson Blvd, Fairfield, CA 94533 in Solano County. The practice phone is (707) 646-5000.
- NorthBay Medical Center1200 B Gale Wilson Blvd, Fairfield, CA 94533 · Solano CountyPhone(707) 646-5000
Source: Dmand AI Affiliation Data
Dr. Derek Joseph Gee is affiliated with 1 site of care and 3 medical groups
Dr. Gee's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. The medical group on file is Greater Modesto Medical Surgical Associates. Dmand AI also links Dr. Gee to 2 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Derek Joseph Gee's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gee practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NorthBay Medical Center | Available with a free account |
| +2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across NorthBay Healthcare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Derek Joseph Gee is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Gee's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Gee is board certified in anesthesiology by the American Board of Anesthesiology. Dmand AI has Dr. Gee's licenses on file in 2 states: California and Arizona.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
- Arizona license
Anesthesiologists near Dr. Gee
Counts of anesthesiologists 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. Derek Joseph Gee billed Medicare for 41 services in 2024
CMS data shows 41 Medicare services from Dr. Gee across 3 procedure codes in 2024, for 114 Medicare patients. Medicare paid $4,051 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Gee's Medicare services by type, 2022 to 2024
- 2022
- 2024
- Anesthesia
- 2022: 322024: 1456%
- Surgery
- 2022: 02024: 14
- Imaging
- 2022: 122024: 138%
- Office and hospital visits
- 2022: 332024: 0100%
Dr. Gee compared with the California median for anesthesiologists, 2024
- Dr. Gee
- California median
- Medicare services
- 41vs 7243% below
- Medicare patients
- 114vs 14320% below
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
Dr. Gee'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.
Need commercial claims for Dr. Gee?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gee and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Derek Joseph Gee treated 114 Medicare patients in 2024, average age 70
CMS counts 114 Medicare patients who saw Dr. Gee in 2024. The largest group is 65 to 74, with 48 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 48% are also on Medicaid. Their average risk score is 2.48, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Gee's median patient age at 53, with 51% women.
Dr. Gee's Medicare patients by age, 2024
Dr. Gee's Medicare patients by sex, 2024
- Women6557%
- Men4943%
Chronic conditions among Dr. Gee's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Diabetes51%
- Chronic kidney disease45%
- Mood disorders38%
- Depression34%
- Ischemic heart disease32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gee's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Derek Joseph Gee takes part in Medicare
Dr. Gee accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Derek Joseph Gee received $185 in industry payments from 2016 to 2024
CMS Open Payments shows 5 general payments to Dr. Gee from 3 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Edwards Lifesciences Corporation paid the most, $139.
General payments to Dr. Gee by program year, 2016 to 2024
Companies that paid Dr. Gee the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Derek Joseph Gee graduated from American University of the Caribbean School of Medicine
Dr. Gee graduated from American University of the Caribbean School of Medicine in 2001.
- Medical school
- Board certified in anesthesiology
Source: Dmand AI Professional Profile Data
Dr. Derek Joseph Gee accepts plans from 1 insurance carrier
Dr. Gee is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Derek Joseph Gee'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) |
| 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. Derek Joseph Gee
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. Derek Joseph Gee's NPI number?
Dr. Derek Joseph Gee's NPI number is 1104926773. It was assigned on September 24, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Derek Joseph Gee?
Dr. Derek Joseph Gee is an anesthesiologist in Fairfield, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Derek Joseph Gee practice?
Dr. Gee practices at 1200 B Gale Wilson Blvd, Fairfield, CA 94533. Dr. Gee's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. Dmand AI also links Dr. Gee to 2 medical groups.
What is Dr. Derek Joseph Gee's office phone number?
The practice phone on file for Dr. Gee is (707) 646-5000.
What is Dr. Derek Joseph Gee's medical license number?
Dr. Gee holds California license A92328, one of the licenses on file in 2 states.
Which states has Dr. Derek Joseph Gee been licensed in?
Dmand AI has state licenses on file for Dr. Gee in California (2005 to 2027) and Arizona (2005 to 2009).
Which hospitals is Dr. Derek Joseph Gee affiliated with?
Dr. Gee practices at NorthBay Medical Center in Fairfield, California.
What medical group is Dr. Derek Joseph Gee part of?
Dr. Gee is linked to Greater Modesto Medical Surgical Associates. Dmand AI links Dr. Gee to 2 more medical groups.
Does Dr. Derek Joseph Gee accept Medicare?
Yes. CMS data shows Dr. Gee billed Medicare for 41 services in 2024, and Dr. Gee accepts Medicare assignment.
How many Medicare patients does Dr. Derek Joseph Gee see?
CMS counts 114 Medicare patients who saw Dr. Gee in 2024, with an average age of 70.
Show 6 more questionsShow fewer questions
Is Dr. Derek Joseph Gee board certified?
Yes. Dr. Gee is board certified in anesthesiology by the American Board of Anesthesiology.
What services does Dr. Derek Joseph Gee bill to Medicare?
In 2024, Dr. Gee's most billed Medicare services were anesthesia (00790), surgery: heart and blood vessels (36620) and ultrasound (76937).
Where did Dr. Derek Joseph Gee go to medical school?
Dr. Gee graduated from American University of the Caribbean School of Medicine in 2001.
Has Dr. Derek Joseph Gee received payments from drug or device companies?
CMS Open Payments shows $185 in general payments to Dr. Gee from 3 companies from 2016 to 2024. The largest total came from Edwards Lifesciences Corporation.
How long has Dr. Derek Joseph Gee been practicing?
Dr. Gee graduated from medical school in 2001, 25 years ago.
What insurance does Dr. Derek Joseph Gee accept?
Dr. Gee is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
Selling to anesthesiology practices?
See anesthesiologists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card