In June 2015, a small dental office on North Cedar Street in downtown Escondido sent out a press release that had nothing to do with whitening or crowns. It announced a trip. Dr. Jon M. Campbell, then a partner in what was called Marler Campbell Dental Group, would be going back to the Dominican Republic the following year to treat patients in places where dental care is hard to find, and this time, the release said, his son would finally be old enough to come along.
It was not a first. Campbell had gone five times while he was still a dental student in Ohio, and roughly every two years after that. The release is a small document, but it captures something that is easy to miss about the dentist behind the plain storefront on Cedar Street: he is a local kid who came home to practice, and a teacher who keeps leaving to train the next generation somewhere else. This feature is built entirely from public records and published material. Dentist News Today did not interview Dr. Campbell, and coverage is never paid.
A valley kid, an Escondido diploma
According to the practice’s biography pages, Campbell was raised in Valley Center, the rural community northeast of Escondido, and graduated from Orange Glen High School on the city’s east side. Orange Glen sits about 1.7 miles, in a straight line, from the office he runs today. He went on to California State University San Marcos, then left the state for the Case Western Reserve University School of Dental Medicine in Cleveland, where the practice says he graduated at the top of his clinical class.
The federal provider registry first lists him, as Jon Michael Campbell, DMD, at 129 N. Cedar St. on June 26, 2008, and that is still his address of record. The Dental Board of California shows his license, number 57108, as current and active with no disciplinary action, as of a check this month. The license is issued to Jon Michael Campbell Jr.
The practice makes a point of the homecoming. Its site notes that patients may recognize him from high school or the grocery store. He and his wife, Becky, have four sons and a daughter. His biography lists coaching several of his boys’ sports teams, a volunteer leadership role at his church and active membership in the Boy Scouts of America, along with volleyball, wakeboarding and scuba diving.
Five trips before graduation
The 2015 release is the most detailed public account of Campbell’s work abroad, and it is unusual in that it quotes him at length. He first heard about the Dominican Republic trips in dental school, he said, and “ended up going five times” before graduating. The trips are organized by the G3 Foundation, which the release described as providing free dental care and basic medical services where care is scarce, with more than 6,500 people helped since 2000.
G3 is a small organization with an outsized footprint. The American Dental Association’s volunteer directory lists it at an address in Manti, Utah, with a mission of dental and humanitarian relief for people with limited access to care, and trips of seven to 10 days to the Dominican Republic and Samoa. A 2022 profile in Utah’s Sanpete Messenger credits Leonard Aste, a Manti dentist, with taking the lead in forming the nonprofit after a fellow dentist invited him to the Dominican Republic following a hurricane. Over roughly 25 years, the paper reported, the foundation had taken about 3,000 volunteers on at least 40 trips, recruiting from the University of Utah’s dental school, a private dental school in Salt Lake County, dental schools in Scotland and Spain, and physician assistant and hygiene programs in Idaho and Utah.
The model depends on mentors. Most of the treatment, the 2015 release said, is delivered by third- and fourth-year dental students working under licensed dentists like Campbell. His description of what those students get out of a week in the field is the best line in the release.
“In just a week, they’re basically doing the equivalent of several months of work at school.”
Dr. Jon M. Campbell, in a June 2015 practice press release
What does a week like that look like in numbers? The release doesn’t say, but Case Western’s own news office published a rare tally from a separate 2014 trip by its dental students to the Dominican Republic. That item did not name the organizing group or any of the participants, so it should not be read as a report on Campbell’s trips. It is useful only as a sense of scale: 16 students, nine days, 262 patients, 80 of them children, 416 teeth extracted and 99 fillings placed.
Extractions outnumbering fillings by roughly four to one is a telling ratio. A filling repairs a tooth that can still be kept; an extraction is generally what is left when decay or infection has gone further. On a trip measured in days, with patients who may not see a dentist again for a long time, the work tilts toward ending pain.
The office on Cedar Street
For years the practice carried two names. A 2015 blog post for Marler Campbell Dental Group invited readers to call “the Escondido office of Dr. Kurt Marler and Dr. Jon Campbell.” Today the practice’s homepage identifies it as Campbell Dental Arts, formerly Marler Campbell Dental Group, and says it has served families for more than 30 years. The site does not give a founding year or say when the name changed, and we could not find either in public records, so we have not guessed.
The office’s address of record has stayed the same throughout: 129 N. Cedar St., on the eastern side of the downtown grid. The practice lists membership in the American Dental Association, the California Dental Association and the San Diego County Dental Society.
What the practice offers is broad, family-practice dentistry. Its service menu covers exams, cleanings, sealants, fluoride, extractions and night and sports guards on the preventive side; fillings, crowns, bridges, implants, bonding and dentures on the restorative side; and whitening, veneers and ClearCorrect clear aligners on the cosmetic side. It also lists periodontal treatment, emergency care and pediatric dentistry, and it encourages families to bring children in for a first visit around age 3. The website says the office sees patients from Escondido as well as Poway, Ramona, Rancho Bernardo, San Marcos and Valley Center, the town where Campbell grew up. Details are at campbelldentalarts.com.
A downtown with a long memory
The office sits in a town that was laid out as a real-estate venture in the 1880s. The Escondido History Center dates the city to the Escondido Land and Town Company, whose investors bought the 12,814-acre valley in the mid-1880s. The Santa Fe line from Oceanside was built between March 1887 and January 1888, and residents voted 64 to 19 to incorporate on Oct. 8, 1888. The name is Spanish for “hidden.”
Much of what visitors see downtown is the residue of that founding era. Grand Avenue was fully paved by 1912 and lined with palms in 1914, according to the History Center’s timeline. The first official Grape Day was held on Sept. 9, 1908, in what is now Grape Day Park, about eight-tenths of a mile west of Campbell’s office. The park later became a kind of open-air archive: the city’s first library building was moved there in 1971, and the old Santa Fe depot followed in 1984. Since 2000, the Cruisin’ Grand car show has filled Grand Avenue on summer Friday evenings.
The city around that downtown has changed. Escondido counted 151,038 residents in the 2020 census. In ZIP code 92025, which includes the office, the Census Bureau’s 2020–2024 American Community Survey estimates a population of about 50,000, a median household income of $81,106 against $106,268 for San Diego County as a whole, and a Hispanic or Latino share of 55.5 percent, compared with 34.6 percent countywide. The neighborhood’s median age is 36.4. Those numbers describe a younger, more working-class and more bilingual community than the county average, which is the setting for a family practice that says it sees children from age 3.
The hometown dentist as a vanishing type
Campbell’s arc, from local high school to out-of-state dental school and back to his own downtown office, used to be the default story of American dentistry. It is becoming less common. The American Dental Association’s Health Policy Institute reported in 2024 that 13 percent of U.S. dentists were affiliated with a dental service organization in 2022, up from 8.8 percent in 2017. Among dentists five or fewer years out of school, the share was 27 percent.
The same data show how age shapes practice life. Half of dentists who graduated more than 25 years ago work in solo practice, the ADA reported, compared with 17 percent of those who graduated within the past decade. Independent, owner-run offices like this one are, statistically, working against that current. For patients, the practical difference is continuity: the same name on the door, and often the same dentist, for decades.
The Dominican Republic work has its own version of that continuity. The Sanpete Messenger reported that some of the European dental schools G3 works with require students to complete a humanitarian trip abroad, and the foundation’s model depends on licensed dentists to supervise them. Campbell’s own account, five trips as a student and roughly one every two years since, describes someone who went first as a trainee and kept going back as a mentor.
Questions patients ask
What are the office hours?
The practice’s contact page lists Tuesday through Thursday, 8 a.m. to 5 p.m., and Friday, 8 a.m. to 4 p.m. The office is closed Saturday through Monday. The phone number is (760) 745-9814.
Does the office see children?
Yes. The practice lists pediatric and family dentistry and suggests a first visit around age 3. Dr. Campbell’s biography notes that he is the father of five.
Which insurance plans are accepted?
The practice website does not publish a list of insurance plans, and it does not say whether it accepts Medi-Cal Dental. Patients should call the office to ask.
Where is the office, and who does it serve?
Campbell Dental Arts is at 129 N. Cedar St., Escondido, CA 92025, in the downtown core. The practice says it also sees patients from Poway, Ramona, Rancho Bernardo, San Marcos and Valley Center.
What cosmetic and orthodontic options are offered?
The practice lists whitening, porcelain veneers and ClearCorrect clear aligners, along with implants, crowns and bridges.
This feature was written from public information only. Dentist News Today did not interview the practice, and coverage is never paid. Corrections are welcome through our contact page.
Sources
- Escondido Dentist Planning a Return Trip to the Dominican Republic in 2016, Marler Campbell Dental Group via PRLeap, June 23, 2015
- Campbell Dental Arts | Escondido, CA (homepage), Campbell Dental Arts
- Jon M. Campbell, DMD: Your Dentist in Escondido, Campbell Dental Arts
- Meet Your Dentist, Dr. Campbell, Campbell Dental Arts
- Contact Campbell Dental Arts in Escondido, CA, Campbell Dental Arts
- Porcelain or Composite Veneers? (Marler Campbell Dental Group blog), Marler Campbell Dental Group, June 1, 2015
- G3 Foundation (volunteer program listing), American Dental Association
- Coming to Manti was one of the best decisions they ever made, Sanpete Messenger (Suzanne Dean), Sept. 22, 2022, updated June 6, 2025
- Sixteen dental school students take Dominican Republic trip, Case Western Reserve University, Aug. 29, 2014
- NPI 1568624179: Jon Michael Campbell, DMD, CMS NPPES NPI Registry
- License lookup: Campbell, Jon Michael Jr., Dentist 57108, Dental Board of California / Department of Consumer Affairs, checked Nov. 9, 2026
- Escondido’s Colorful History, Escondido History Center
- Escondido, California, Wikipedia
- ZCTA 92025 profile (ACS 2020–2024 5-year estimates), Census Reporter / U.S. Census Bureau
- San Diego County profile (ACS 2020–2024 5-year estimates), Census Reporter / U.S. Census Bureau
- Practice modality by the numbers, ADA News (Mary Beth Versaci), Feb. 20, 2024
- Geocoder result for 129 N Cedar St, Escondido (distances computed from Census geocodes), U.S. Census Bureau
