Dr. Mark Shigeru Ishimaru, MD
- Affiliated sites
- 1
- Medical groups
- 3
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 26730 Crown Valley Pkwy, 1st Floor, Mission Viejo, CA 92691
- Practice phone
- Call (714) 364-2201
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mission Surgery Center - Mission Viejo
Surgery Center - Medicare-Certified · Mission Viejo, California
Find Dr. Ishimaru'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. Mark Shigeru Ishimaru is an orthopedic surgeon in Mission Viejo, California
Dr. Ishimaru practices at Mission Surgery Center - Mission Viejo in Mission Viejo, California.
Dr. Ishimaru's NPI, 1821041161, was assigned on May 18, 2006. Dr. Ishimaru graduated from College of Human Medicine - Grand Rapids in 1973. Dr. Ishimaru holds California license G27381.
- NPI
- 1821041161NPI Registry (opens in a new tab)
- NPI enumeration date
- May 18, 2006
- NPI status
- Active
- Practice phone
- (714) 364-2201
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Shigeru Ishimaru practices at Mission Surgery Center - Mission Viejo in Mission Viejo, California
Dr. Ishimaru's primary practice is Mission Surgery Center - Mission Viejo, at 26730 Crown Valley Pkwy, 1st Floor, Mission Viejo, CA 92691. The practice phone is (714) 364-2201.
- Mission Surgery Center - Mission Viejo26730 Crown Valley Pkwy, 1st Floor, Mission Viejo, CA 92691Phone(714) 364-2201
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Shigeru Ishimaru is affiliated with 1 site of care and 3 medical groups
Dr. Ishimaru's primary practice is Mission Surgery Center - Mission Viejo in Mission Viejo, California. Dmand AI also links Dr. Ishimaru to 3 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Shigeru Ishimaru's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ishimaru practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mission Surgery Center - Mission Viejo | Available with a free account |
| +3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Shigeru Ishimaru is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Ishimaru's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Ishimaru is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dr. Ishimaru is licensed in California.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
Orthopedic surgeons near Dr. Ishimaru
Counts of orthopedic surgeons 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. Mark Shigeru Ishimaru's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Dr. Ishimaru's median patient age at 75, with 75% women.
Dr. Ishimaru's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women75%
- Men25%
Source: Dmand AI Patient Panel Data
Dr. Mark Shigeru Ishimaru graduated from College of Human Medicine - Grand Rapids
Dr. Ishimaru graduated from College of Human Medicine - Grand Rapids in 1973.
- Medical school
- Board certified in orthopaedic surgery
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Shigeru Ishimaru'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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 Dr. Mark Shigeru Ishimaru
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What is Dr. Mark Shigeru Ishimaru's NPI number?
Dr. Mark Shigeru Ishimaru's NPI number is 1821041161. It was assigned on May 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Shigeru Ishimaru?
Dr. Mark Shigeru Ishimaru is an orthopedic surgeon in Mission Viejo, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Mark Shigeru Ishimaru practice?
Dr. Ishimaru practices at 26730 Crown Valley Pkwy, 1st Floor, Mission Viejo, CA 92691. Dr. Ishimaru's primary practice is Mission Surgery Center - Mission Viejo in Mission Viejo, California. Dmand AI also links Dr. Ishimaru to 3 medical groups.
What is Dr. Mark Shigeru Ishimaru's office phone number?
The practice phone on file for Dr. Ishimaru is (714) 364-2201.
What is Dr. Mark Shigeru Ishimaru's medical license number?
Dr. Ishimaru holds California license G27381.
Is Dr. Mark Shigeru Ishimaru board certified?
Yes. Dr. Ishimaru is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery.
Where did Dr. Mark Shigeru Ishimaru go to medical school?
Dr. Ishimaru graduated from College of Human Medicine - Grand Rapids in 1973.
How long has Dr. Mark Shigeru Ishimaru been practicing?
Dr. Ishimaru graduated from medical school in 1973, 53 years ago.
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