Dr. Ralph H. Maeda Jr., MD
- Medicare services, 2017
- 224
- Part D claims, 2017
- 53
- Industry payments
- $441
- Affiliated sites
- 1
- Medical groups
- 2
- Practice address
- 26732 Crown Valley Pkwy, #241, Mission Viejo, CA 92691
- Practice phone
- Call (714) 364-2611
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Gastroenterology and Endoscopy Institute of Orange County
Surgery Center - Medicare-Certified · Mission Viejo, California
Find Dr. Maeda'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. Ralph H. Maeda Jr. is a general surgeon in Mission Viejo, California
Dr. Maeda practices at Gastroenterology and Endoscopy Institute of Orange County in Mission Viejo, California.
Dr. Maeda's NPI, 1902806136, was assigned on July 29, 2005. Dr. Maeda graduated from Keck School of Medicine of USC in 1979. Dr. Maeda holds California license G43462.
- NPI
- 1902806136NPI Registry (opens in a new tab)
- NPI enumeration date
- July 29, 2005
- NPI status
- Active
- Practice phone
- (714) 364-2611
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ralph H. Maeda Jr. practices at Gastroenterology and Endoscopy Institute of Orange County in Mission Viejo, California
Dr. Maeda's primary practice is Gastroenterology and Endoscopy Institute of Orange County, at 26732 Crown Valley Pkwy, #241, Mission Viejo, CA 92691. The practice phone is (714) 364-2611.
- Gastroenterology and Endoscopy Institute of Orange County26732 Crown Valley Pkwy, #241, Mission Viejo, CA 92691Phone(714) 364-2611
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ralph H. Maeda Jr. is affiliated with 1 site of care and 2 medical groups
Dr. Maeda's primary practice is Gastroenterology and Endoscopy Institute of Orange County in Mission Viejo, California. The medical group on file is OC Surgeons (South Orange County Surgical). Dmand AI also links Dr. Maeda to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Ralph H. Maeda Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maeda practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Gastroenterology and Endoscopy Institute of Orange County | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ralph H. Maeda Jr. is one of 2,926 general surgeons in California
Surgery is Dr. Maeda's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Maeda is board certified in surgery by the American Board of Surgery. Dr. Maeda is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
General surgeons near Dr. Maeda
Counts of general 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. Ralph H. Maeda Jr. billed Medicare for 224 services in 2017
CMS data shows 224 Medicare services from Dr. Maeda across 8 procedure codes in 2017. Medicare paid $23,028 for them.
Dr. Maeda's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 3462017: 17450%
- Imaging
- 2016: 222017: 2618%
- Surgery
- 2016: 522017: 2454%
Where Dr. Maeda's Medicare services took place, 2017
- In an office13058%
- In a facility9442%
Dr. Maeda compared with the California median for general surgeons, 2017
- Dr. Maeda
- California median
- Medicare services
- 224vs 16635% above
- Part D claims
- 53vs 3456% above
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Maeda's most billed Medicare procedure codes, 2017
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Maeda and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ralph H. Maeda Jr.'s patients have a median age of 78
Across all payers, Dmand AI patient panel data puts Dr. Maeda's median patient age at 78, with 0% women.
Dr. Maeda's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. Ralph H. Maeda Jr. wrote 53 Medicare Part D claims in 2017
In 2017, Dr. Maeda wrote 53 Medicare Part D claims. They cover 2 drugs, with $291 in total drug cost. In 2016, CMS named 105 claims across 3 drugs.
Dr. Maeda's most prescribed drugs by claims, 2017
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, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 1052017: 5350%
Drugs named by CMS: 2 in 2017, 3 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Ralph H. Maeda Jr. received $441 in industry payments from 2016 to 2017
CMS Open Payments shows 7 general payments to Dr. Maeda from 7 drug and device companies from 2016 to 2017. Food and beverage make up the largest share, 95% of the total. Cianna Medical Inc paid the most, $157.
General payments to Dr. Maeda by program year, 2016 to 2017
General payments to Dr. Maeda by kind, 2016 to 2017
- Food and beverage$41895%
- Entertainment$235%
Companies that paid Dr. Maeda the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ralph H. Maeda Jr. graduated from Keck School of Medicine of USC
Dr. Maeda graduated from Keck School of Medicine of USC in 1979.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Ralph H. Maeda Jr. accepts plans from 5 insurance carriers
Dr. Maeda is in network with 5 carriers, including Elevance, Blue Cross Blue Shield of Massachusetts and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- HCSC
- Regence Health Plans
Plan types Dr. Maeda accepts, by number of carriers
- Medicare5
- PPO5
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Ralph H. Maeda Jr.'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) |
| 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) |
| 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. Ralph H. Maeda Jr.
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. Ralph H. Maeda Jr.'s NPI number?
Dr. Ralph H. Maeda Jr.'s NPI number is 1902806136. It was assigned on July 29, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Ralph H. Maeda Jr.?
Dr. Ralph H. Maeda Jr. is a general surgeon in Mission Viejo, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Ralph H. Maeda Jr. practice?
Dr. Maeda practices at 26732 Crown Valley Pkwy, #241, Mission Viejo, CA 92691. Dr. Maeda's primary practice is Gastroenterology and Endoscopy Institute of Orange County in Mission Viejo, California. Dmand AI also links Dr. Maeda to 1 medical group.
What is Dr. Ralph H. Maeda Jr.'s office phone number?
The practice phone on file for Dr. Maeda is (714) 364-2611.
What is Dr. Ralph H. Maeda Jr.'s medical license number?
Dr. Maeda holds California license G43462.
What medical group is Dr. Ralph H. Maeda Jr. part of?
Dr. Maeda is linked to OC Surgeons (South Orange County Surgical). Dmand AI links Dr. Maeda to 1 more medical group.
Does Dr. Ralph H. Maeda Jr. accept Medicare?
Yes. CMS data shows Dr. Maeda billed Medicare for 224 services in 2017.
Is Dr. Ralph H. Maeda Jr. board certified?
Yes. Dr. Maeda is board certified in surgery by the American Board of Surgery.
What services does Dr. Ralph H. Maeda Jr. bill to Medicare?
In 2017, Dr. Maeda's most billed Medicare services were office visit, new patient (99203), office visit, established patient (99213) and hospital inpatient care (99232).
Where did Dr. Ralph H. Maeda Jr. go to medical school?
Dr. Maeda graduated from Keck School of Medicine of USC in 1979.
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What drugs does Dr. Ralph H. Maeda Jr. prescribe most?
In 2017 Medicare Part D data, Dr. Maeda's most prescribed drugs by claims were Oxycodone-Acetaminophen and Cefadroxil.
Has Dr. Ralph H. Maeda Jr. received payments from drug or device companies?
CMS Open Payments shows $441 in general payments to Dr. Maeda from 7 companies from 2016 to 2017. The largest total came from Cianna Medical Inc.
How long has Dr. Ralph H. Maeda Jr. been practicing?
Dr. Maeda graduated from medical school in 1979, 47 years ago.
What insurance does Dr. Ralph H. Maeda Jr. accept?
Dr. Maeda is in network with 5 carriers, including Elevance, Blue Cross Blue Shield of Massachusetts and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
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