Mark R. Christensen, OD
- Medicare patients, 2024
- 49
- Part D claims, 2024
- 33
- Hospital affiliations
- 1
- Industry payments
- $156
- State license
- 1
- 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 Mark Christensen's professional email, personal email and mobile number
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Mark R. Christensen is an optometrist in Fairfield, California
Mark Christensen practices at NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare.
Mark Christensen's NPI, 1518038108, was assigned on November 13, 2006. Mark Christensen graduated from Pacific University - College of Optometry in 1983. Mark Christensen holds California license OPT 7874 TPA.
- NPI
- 1518038108NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749371003
- NPI enumeration date
- November 13, 2006
- NPI status
- Active
- Practice phone
- (707) 646-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Mark R. Christensen practices at NorthBay Medical Center in Fairfield, California
Mark Christensen'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
Mark R. Christensen is affiliated with 2 sites of care
Mark Christensen's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. Dmand AI also links Mark Christensen to 1 physician office, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Mark R. Christensen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Christensen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NorthBay Medical Center | Available with a free account |
| +1 more affiliated site | 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.
Mark R. Christensen is one of 7,206 optometrists in California
Optometrist is Mark Christensen's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Mark Christensen is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Mark Christensen
Counts of optometrists 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
Mark R. Christensen treated 49 Medicare patients in 2024, average age 77
CMS counts 49 Medicare patients who saw Mark Christensen in 2024. The largest group is 75 to 84, with 22 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 0.86, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Mark Christensen's median patient age at 66, with 55% women.
Mark Christensen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Mark Christensen's Medicare patients by sex, 2024
- Women3265%
- Men1735%
Chronic conditions among Mark Christensen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis41%
- Diabetes24%
Share of Medicare patients with each condition. A patient can have several.
Mark Christensen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women55%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Mark R. Christensen wrote 33 Medicare Part D claims in 2024
In 2024, Mark Christensen wrote 33 Medicare Part D claims for 21 patients. 36% of them were for generic drugs.
Mark Christensen's Part D claims by kind of drug, 2024
- Generic12 claims36%
- Brand-name21 claims64%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Mark R. Christensen received $156 in industry payments in 2025
CMS Open Payments shows 3 general payments to Mark Christensen from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $137.
Companies that paid Mark Christensen the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Mark R. Christensen graduated from Pacific University - College of Optometry
Mark Christensen graduated from Pacific University - College of Optometry in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Mark R. Christensen'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 patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (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 |
| 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 Mark R. Christensen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mark R. Christensen's NPI number?
Mark R. Christensen's NPI number is 1518038108. It was assigned on November 13, 2006, and it is active in the NPI Registry.
What does Mark R. Christensen specialize in?
Mark R. Christensen is an optometrist in Fairfield, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Mark R. Christensen practice?
Mark Christensen practices at 1200 B Gale Wilson Blvd, Fairfield, CA 94533. Mark Christensen's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. Dmand AI also links Mark Christensen to 1 physician office.
What is Mark R. Christensen's office phone number?
The practice phone on file for Mark Christensen is (707) 646-5000.
What is Mark R. Christensen's medical license number?
Mark Christensen holds California license OPT 7874 TPA.
Which hospitals is Mark R. Christensen affiliated with?
Mark Christensen practices at NorthBay Medical Center in Fairfield, California.
How many Medicare patients does Mark R. Christensen see?
CMS counts 49 Medicare patients who saw Mark Christensen in 2024, with an average age of 77.
Where did Mark R. Christensen go to medical school?
Mark Christensen graduated from Pacific University - College of Optometry in 1983.
Has Mark R. Christensen received payments from drug or device companies?
CMS Open Payments shows $156 in general payments to Mark Christensen from 2 companies from 2025 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Mark R. Christensen been practicing?
Mark Christensen graduated from medical school in 1983, 43 years ago.
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