# The Dermatology Collective, Glendora: a dermatologist in Glendora (2026 guide) Source: Local AI Registry, https://localairegistry.com/biz/ca/glendora/the-dermatology-collective-glendora-ca. Free to reuse with a link back. By Steve Lee, founder and CEO of Local AI Registry. Fact-checked against 2 sources. Updated 2026-10-22. Owner review: not yet. Canonical: https://localairegistry.com/biz/ca/glendora/the-dermatology-collective-glendora-ca ## Photos - ![Photo 1](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmstwrizc03b4yedrrsojoa5d%2F0.jpg) - ![Photo 2](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmstwrizc03b4yedrrsojoa5d%2F1.jpg) - ![Photo 3](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmstwrizc03b4yedrrsojoa5d%2F2.jpg) - ![Photo 4](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmstwrizc03b4yedrrsojoa5d%2F3.jpg) - ![Photo 5](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmstwrizc03b4yedrrsojoa5d%2F4.jpg) ## In short The Dermatology Collective is a dermatologist in Glendora, CA. Its AI Score is 44 of 100, which is poor. Every fact on this page carries one of three marks: Confirmed (from their website, Google Business Profile, review sites, licensing boards, or measured by Local AI Registry), Visitor submitted (added by a person, with a date and how they know), or AI guess (what AI engines like Gemini and ChatGPT are saying, not confirmed by anyone). Every mark points to a reference at the end of this page. ## Key facts | Fact | Value | | --- | --- | | Type | Dermatologist | | Address | 552 W Foothill Blvd Ste 202, Glendora, CA 91741, USA | | Hours | Mon to Fri 9 AM to 12 PM and 1:30 AM to 5 PM · Closed Sat to Sun | | Phone | (626) 240-2020 | | Medical director | Nothing found | | Rating | 4.9 across 330 reviews on Google | | Known for | The Dermatology Collective is best known for Dr. Christopher Tomassian, who is highly regarded for his thorough and attentive dermatological care in Glendora. | | Prices | Nothing found | | Quietest time | Nothing found | | Parking | Nothing found | | Last verified | September 18, 2026, 7:37 PM | ## All the details Every row is something the owner can add or correct. Each one is marked Confirmed, Visitor submitted or AI guess, with where it came from. | Group | Fact | Value | Mark | Evidence | | --- | --- | --- | --- | --- | | Location info | Address | 552 W Foothill Blvd Ste 202, Glendora, CA 91741, USA | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Location info | Description | "Dr. Chris Tomassian is a Board-Certified Dermatologist based in Glendora, CA. Dr. Tomassian completed his medical school training at University of Missouri, Kansas City School of Medicine with high honors and inducted into the AOA society. He then continued his dermatology residency training at Kansas University Medical Center. After his training, he returned back home to provide high end accessible dermatology care for his community. His clinic serves his patients for both medical dermatology and cosmetic dermatology. Cosmetic services include but are not limited to laser treatments, botox, filler, hydra facials (Bela MD+), peels and more! We are open once or twice a month on Saturdays so if you want a weekend appointment, give us a call! | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Location info | Hours | Mon to Fri 9:00 AM to 12:00 PM, 1:30 to 5:00 PM · Sat to Sun Closed | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Location info | Mondays | 9:00 AM to 12:00 PM, 1:30 to 5:00 PM | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Location info | Name | The Dermatology Collective | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Location info | Phone | (626) 240-2020 | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Hours | Monday | 9:00 AM to 12:00 PM and 1:30 AM to 5:00 PM | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Hours | Tuesday | 9:00 AM to 12:00 PM and 1:30 AM to 5:00 PM | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Hours | Wednesday | 9:00 AM to 12:00 PM and 1:30 AM to 5:00 PM | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Hours | Thursday | 9:00 AM to 12:00 PM and 1:30 AM to 5:00 PM | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Hours | Friday | 9:00 AM to 12:00 PM and 1:30 AM to 5:00 PM | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Hours | Saturday | Closed | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Hours | Sunday | Closed | Confirmed | Google Business Profile, checked Aug 14, 2026 | | Services | Service | Botox | AI guess | Nothing found | | Services | Service | Chemical peels | AI guess | Nothing found | | Services | Service | Cosmetic dermatology | AI guess | Nothing found | | Services | Service | Filler | AI guess | Nothing found | | Services | Service | Hydra facials | AI guess | Nothing found | | Services | Service | Laser treatments | AI guess | Nothing found | | Links | Website | https://www.thedermatologycollective.com/?utm_source=google&utm_medium=organic&utm_campaign=gbp_website_link | Confirmed | Google Business Profile, checked Aug 14, 2026 | ## Services and prices Services not read yet, back on Scan Day. ### Known for The Dermatology Collective is best known for Dr. Christopher Tomassian, who is highly regarded for his thorough and attentive dermatological care in Glendora. ## The team Nothing found ## Visiting The Dermatology Collective Address: 552 W Foothill Blvd Ste 202, Glendora, CA 91741, USA. Phone: (626) 240-2020. Hours: Mon to Fri 9 AM to 12 PM and 1:30 AM to 5 PM · Closed Sat to Sun. (Confirmed, Google Business Profile, checked August 14, 2026 at 10:01 PM.) ### Location info from Google Business Profile Business description, written by The Dermatology Collective on its Google Business Profile: ""Dr. Chris Tomassian is a Board-Certified Dermatologist based in Glendora, CA. Dr. Tomassian completed his medical school training at University of Missouri, Kansas City School of Medicine with high honors and inducted into the AOA society. He then continued his dermatology residency training at Kansas University Medical Center. After his training, he returned back home to provide high end accessible dermatology care for his community. His clinic serves his patients for both medical dermatology and cosmetic dermatology. Cosmetic services include but are not limited to laser treatments, botox, filler, hydra facials (Bela MD+), peels and more! We are open once or twice a month on Saturdays so if you want a weekend appointment, give us a call!" ### When to go Busy times not read yet, back on Scan Day. ### Parking and getting in Nothing found ### Nearby | Place | Type | Distance | | --- | --- | --- | | Grand Ave and Foothill Blvd | Bus stop | 2 min walk | | Foothill Boulevard and Grand Avenue (Eastbound) | Bus stop | 2 min walk | | Foothill Blvd and Valencia St E | Bus stop | 3 min walk | | Foothill Blvd and Valencia St W | Bus stop | 3 min walk | | Grand Avenue and Foothill Boulevard | Bus stop | 3 min walk | | Foothill Boulevard and Grand Avenue (Westbound) | Bus stop | 3 min walk | ## Reputation 4.9 average across 330 reviews: Google 25. (Confirmed, read August 14, 2026.) The Dermatology Collective is noted for its effective treatments and caring staff, though some customers report issues with wait times and scheduling. (AI guess, from 330 reviews.) ### What people like - Successful outcomes from laser treatments ### What people do not like - Long waits past appointment times - Issues with appointment scheduling - Unprofessional behavior from some staff ### Press No press story about The Dermatology Collective found yet. ### Awards None named yet. ### Directories Directory listings not read yet. ## Recent updates from The Dermatology Collective The Dermatology Collective hasn't posted an update here yet. ## Questions people ask ### people keep recommending The Dermatology Collective, what for? No answer yet ### opening hours at The Dermatology Collective in Glendora, what are they these days? No answer yet ### Why do people rate The Dermatology Collective? No answer yet ### is there a rewards thing here No answer yet ### can I ask for numbing at The Dermatology Collective without it being weird? No answer yet ### What dermatologist questions is Glendora asking AI most? No answer yet ### Booking here, how does it work? No answer yet ### Somewhere to park near The Dermatology Collective? No answer yet ### anyone been on a Saturday, were they trading No answer yet ### medical staff here, or is it techs? No answer yet ### payment plans at The Dermatology Collective, is that a thing? No answer yet ### best dermatologist in Glendora No answer yet ### prices round here, anyone got a number No answer yet ### Downsides nobody puts in a five star review? No answer yet ### torn between The Dermatology Collective and Foothill? No answer yet ### budget options in Glendora, what is decent No answer yet ### walk ins, or is it booked solid No answer yet ### services here, what do people go in for? No answer yet ## What AI gets wrong about The Dermatology Collective We ask Gemini and ChatGPT about The Dermatology Collective. These are the answers that disagree with the record. ChatGPT and Gemini, read by Local AI Registry on Aug 14, 2026. No capture has disagreed with the record yet. ## The AI Score: 44 of 100 The AI Score measures how likely AI engines are to recommend a business, and how accurately. Glendora dermatologists run 26 to 49. Fair starts at 45, good at 65. The Dermatology Collective scores 44, above the Glendora average of 41. The same method scores every business on the registry. | Signal | Weight | Score | What it measures | The Dermatology Collective | | --- | --- | --- | --- | --- | | Retrieval grounding | 26 | 50 | Whether you appear in the ranked results AI retrieves and cites: AI-Overview citations, organic top-10 for your money queries, and the Bing index ChatGPT leans on. | Fair | | Off-property attestation | 20 | 41 | Volume and consistency of what others say about you: YouTube mentions, branded web mentions, third-party “best-of” lists. The cause of retrievability. | Poor | | AI visibility | 14 | 0 | Whether ChatGPT, Gemini, Perplexity, and AI Overviews name you, and whether they name you for the right service. | Nobody at all was recommended in the 2 answers we hold, so there is nothing to score. | | Reviews & response | 12 | 84 | The star average is only one input. We also read volume, velocity, the specificity of review language, and response cadence. Specific reviews are what AI quotes verbatim. | Good | | Backlink & citation authority | 8 | 65 | Domain authority and editorial quality of the sources that attest to you. | Good | | Google Business Profile | 8 | 90 | Required and recommended fields; update cadence. The listing AI pulls from first. | Good | | Speed & mobile | 7 | 77 | Core Web Vitals at the 75th percentile, on a real phone. | Good | | Content freshness & schema | 5 | 53 | Crawl recency, intent alignment, valid JSON-LD, canonicals. | Fair | Full method: https://localairegistry.com/methodology ## How AI decides what to tell you about a dermatologist When you ask ChatGPT, Gemini or Google for a med spa, the AI does not visit each business. It reads what is already written about it: the business website, its Google Business Profile, review sites like Yelp and RealSelf, news stories, licensing boards and directories like this one. Then it repeats what those sources agree on. That is why AI gets small facts wrong. If Yelp says a place is open Mondays and the website says it is not, the AI has to pick one. The table above shows the answers that disagree with the record today. The more sources agree, and the more specific they are, the more confidently AI recommends a business. A review that says "the nurse did half a syringe in my lips and it looks natural" is far more useful to an AI than one that says "great place." ## How to choose a dermatologist in California, with or without AI A few checks take ten minutes and matter more than any rating. This is general information, not medical advice. - Look up every injector. Doctors are listed by the California medical board, and nurses and nurse practitioners by its nursing board. Both lookups are free. - Ask who does the injections, and check that person's license. - Ask for the price per unit of Botox and per syringe of filler, not per area. - Read reviews that name a provider and a treatment. Vague praise is easy to fake. - Check that the hours and phone number match on Google, Yelp and the website. Mismatches are how people end up at a locked door. - Ask whether they dissolve filler and when they would tell you not to add more. ## How to read the marks on this page - Confirmed (solid circle): from a known source. The business website, its Google Business Profile, review sites like Yelp, Healthgrades and RealSelf, a licensing board, or measured by Local AI Registry. - Visitor submitted (hollow circle): added or corrected by a person, with the date and how they know, like a phone call or a visit. - AI guess (hollow triangle): what AI engines are saying right now. Nobody has confirmed it. ## About the author Steve Lee is the founder and CEO of Local AI Registry and sets its editorial standards. He is a former Google executive in Search and a former Microsoft executive, with more than 20 years in digital: search, local discovery, and how people find businesses online. He is based in Irvine. - Expertise: search at Google and Microsoft, AI search, answer engine optimization, generative engine optimization, local SEO, structured data and entity mapping. - Industry: medical aesthetics, injectables, med spa operations and marketing. - Disclosure: Local AI Registry sells services to business owners, including The Dermatology Collective if it claims this page. That does not change what this page says. Every fact carries its source. ## Entity map Every person, place, organization and treatment named on this page, with a stable ID and a public reference. The JSON-LD below connects them to each other. | Entity | Type | ID on this page | Same as | Relationship to The Dermatology Collective | | --- | --- | --- | --- | --- | | The Dermatology Collective | MedicalBusiness | #business | https://www.thedermatologycollective.com/?utm_source=google&utm_medium=organic&utm_campaign=gbp_website_link | Subject of this page | | Botox | MedicalProcedure | #service-botox | https://en.wikipedia.org/wiki/Botulinum_toxin | Service offered | | Glendora, California | City | #city | Nothing found | City The Dermatology Collective is in | | Local AI Registry | Organization | #publisher | https://localairegistry.com | Publisher of this page | | Steve Lee | Person | #author | https://localairegistry.com/team | Author of this page | ## Topical map Where this page sits in the registry. It's one profile among the dermatologists in Glendora, linked to the lists and towns around it. ### Lists - Best dermatologists in Glendora: https://localairegistry.com/leaderboards/ca/glendora/dermatologist - Best businesses in Glendora: https://localairegistry.com/leaderboards/ca/glendora ### Nearby - /los-angeles: https://localairegistry.com/leaderboards/ca/los-angeles - /san-francisco: https://localairegistry.com/leaderboards/ca/san-francisco - /san-jose: https://localairegistry.com/leaderboards/ca/san-jose - /san-diego: https://localairegistry.com/leaderboards/ca/san-diego - /irvine: https://localairegistry.com/leaderboards/ca/irvine - /fresno: https://localairegistry.com/leaderboards/ca/fresno ### Every list - Every leaderboard in California: https://localairegistry.com/leaderboards/ca ## Frequently asked questions ### What is AI search optimization for local business? Getting a business named when a neighbor asks ChatGPT, Gemini, or Perplexity for a recommendation. Some call it AI SEO, some call it generative engine optimization. Traditional SEO fights for ten blue links; this fights for the one answer an assistant says out loud. The AI Score on this page measures the eight signals that drive it. ### What is Local AI Registry? The public record of how AI sees local business. We score every business we list by one published method, we keep the questions people ask about it in one place, and we never sell rank. Looking up any business here is free. ### How does this page help a business get recommended by AI? Assistants read public pages before they answer. This one states what the business does, what people ask about it, and what the Record answers, in one place a machine can read. Correcting what is wrong here changes what an assistant repeats next. ### Who writes the answers here? Registry AI writes the first answer under every question, from the Record and the public sources named beneath it. Neighbors write the rest under pseudonyms. A registered owner can reply as the business, and their reply says so. ### I own The Dermatology Collective. How do I fix something or rank higher? Register the page. It is free, it takes about five minutes, and it lets you correct the Record and reply as the business. Nothing on this page is for sale, so the only thing that moves the score is the work. ## References ### Sources cited - [1] Google Business Profile, https://www.google.com/maps/place/?q=place_id:ChIJqVxjZosnw4ARA_jm2cNyiuY (accessed Aug 14, 2026) - [2] AI engine output: ChatGPT and Gemini, read by Local AI Registry on Aug 14, 2026, https://localairegistry.com/methodology (accessed Sep 18, 2026)