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Dr. Ruby Chan, DO
NPI1346329075PAC ID6002096062
- Part D claims, 2024
- 3,327
- Publications
- 6
- Hospital affiliations
- 1
- Industry payments
- $312
- Medical group
- 1
- Practice address
- 7373 West Ln, Stockton, CA 95210
- Practice phone
- Call (209) 476-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Stockton, California
Find Dr. Chan'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. Ruby Chan is a family medicine physician in Stockton, California
Dr. Chan practices at Permanente Medical Group Inc in Stockton, California.
Dr. Chan's NPI, 1346329075, was assigned on November 3, 2006. Dr. Chan graduated from Heritage College of Osteopathic Medicine in 1994. Dr. Chan holds California license 20A7012.
NPI and contact details
- NPI
- 1346329075NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002096062
- NPI enumeration date
- November 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (209) 476-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ruby Chan practices at Permanente Medical Group Inc in Stockton, California
Dr. Chan's primary practice is Permanente Medical Group Inc, at 7373 West Ln, Stockton, CA 95210 in San Joaquin County. The practice phone is (209) 476-2000.
- Permanente Medical Group Inc7373 West Ln, Stockton, CA 95210 · San Joaquin CountyPhone(209) 476-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ruby Chan is affiliated with 2 sites of care and 1 medical group
Dr. Chan's primary practice is Permanente Medical Group Inc in Stockton, California. Dr. Chan is also affiliated with Sacramento Medical Center. The medical group on file is The Permanente Medical Group, Inc.
Permanente Medical Group IncPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ruby Chan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Permanente Medical Group Inc | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ruby Chan is one of 15,680 family medicine physicians in California
Family medicine is Dr. Chan's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Chan is board certified in family practice and osteopathic manipulative medicine by the AOA Board of Family Physicians. Dmand AI has Dr. Chan's licenses on file in 2 states: California and Ohio.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
- Ohio license
Clinical focus
Dmand AI lists chronic hypertension and erectile dysfunction among the conditions Dr. Chan treats.
Family medicine physicians near Dr. Chan
Counts of family medicine physicians 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. Ruby Chan's patients have a median age of 52
Across all payers, Dmand AI patient panel data puts Dr. Chan's median patient age at 52, with 71% women.
Dr. Chan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women71%
- Men29%
Source: Dmand AI Patient Panel Data
Dr. Ruby Chan wrote 3,327 Medicare Part D claims in 2024
In 2024, Dr. Chan wrote 3,327 Medicare Part D claims for 419 patients. 93% of them were for generic drugs. CMS names the drug for 2,937 of them, across 54 drugs with 11 or more claims each, at $80,101 in total drug cost. In 2023, CMS named 2,916 claims across 54 drugs.
Part D claims, 20243,327
Drugs named by CMS54
Total drug cost$80,101
Part D patients419
Dr. Chan's Part D claims by kind of drug, 2024
- Generic3,085 claims93%
- Brand-name222 claims7%
- Other20 claims1%
Dr. Chan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Chan's Part D claims, 2024
- Opioids1%31 of 3,327 claims
- Antibiotics1%36 of 3,327 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,9162024: 2,9371%
Drugs named by CMS: 54 in 2024, 54 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Ruby Chan takes part in Medicare
Dr. Chan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ruby Chan has 6 publications on record
Dmand AI links 6 papers to Dr. Chan, published from 2012 to 2020. 2012 was the busiest year, with 2. The most frequent topics are Kinetics and Protein Binding. Dr. Chan's most frequent co-authors are Geoffrey Allen Kerchner, MD, PhD and Edmond Huatung Teng, MD, PhD.
Papers6
Years published2012 to 2020
Dr. Chan's papers by year, 2012 to 2020
Topics Dr. Chan writes about most
- Kinetics
- Protein Binding
Dr. Chan's most frequent co-authors
Recent publications by Dr. Chan
Photochem Photobiol
Amino Acid SequenceArginineBacillus subtilis
See who Dr. Chan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chan works with, so you can find a warm path to the right family medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ruby Chan received $312 in industry payments in 2016
CMS Open Payments shows 4 general payments to Dr. Chan from 2 drug and device companies in 2016. Food and beverage make up the largest share, 97% of the total. Avanir Pharmaceuticals, Inc. paid the most, $191.
General payments to Dr. Chan by kind, 2016 to 2016
$312in total
- Food and beverage$30297%
- Education$103%
Companies that paid Dr. Chan the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ruby Chan has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chan, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Chan
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Ruby Chan graduated from Heritage College of Osteopathic Medicine
Dr. Chan graduated from Heritage College of Osteopathic Medicine in 1994. Dr. Chan is a member of AOA.
- Medical school
- Board certified in family practice and osteopathic manipulative medicine
Source: Dmand AI Professional Profile Data
Dr. Ruby Chan accepts plans from 2 insurance carriers
Dr. Chan is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Chan accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Ruby Chan'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| 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)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Ruby Chan
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. Ruby Chan's NPI number?
Dr. Ruby Chan's NPI number is 1346329075. It was assigned on November 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ruby Chan?
Dr. Ruby Chan is a family medicine physician in Stockton, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Ruby Chan practice?
Dr. Chan practices at 7373 West Ln, Stockton, CA 95210. Dr. Chan's primary practice is Permanente Medical Group Inc in Stockton, California.
What is Dr. Ruby Chan's office phone number?
The practice phone on file for Dr. Chan is (209) 476-2000.
What is Dr. Ruby Chan's medical license number?
Dr. Chan holds California license 20A7012, one of the licenses on file in 2 states.
Which states has Dr. Ruby Chan been licensed in?
Dmand AI has state licenses on file for Dr. Chan in California (1997 to 2026) and Ohio (1995 to 1998).
Which hospitals is Dr. Ruby Chan affiliated with?
Dr. Chan is affiliated with Sacramento Medical Center.
What medical group is Dr. Ruby Chan part of?
Dr. Chan is linked to The Permanente Medical Group, Inc.
Does Dr. Ruby Chan accept Medicare?
Yes. CMS lists Dr. Chan as accepting Medicare assignment.
Is Dr. Ruby Chan board certified?
Yes. Dr. Chan is board certified in family practice and osteopathic manipulative medicine by the AOA Board of Family Physicians.
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Where did Dr. Ruby Chan go to medical school?
Dr. Chan graduated from Heritage College of Osteopathic Medicine in 1994.
What drugs does Dr. Ruby Chan prescribe most?
In 2024 Medicare Part D data, Dr. Chan's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Hydrochlorothiazide.
Has Dr. Ruby Chan received payments from drug or device companies?
CMS Open Payments shows $312 in general payments to Dr. Chan from 2 companies from 2016 to 2016. The largest total came from Avanir Pharmaceuticals, Inc.
How long has Dr. Ruby Chan been practicing?
Dr. Chan graduated from medical school in 1994, 32 years ago.
Does Dr. Ruby Chan do research?
Dmand AI links 6 publications to Dr. Chan, published from 2012 to 2020.
Who does Dr. Ruby Chan publish with?
Dr. Chan's most frequent co-authors are Geoffrey Allen Kerchner, MD, PhD (1 shared paper) and Edmond Huatung Teng, MD, PhD (1 shared paper).
What insurance does Dr. Ruby Chan accept?
Dr. Chan is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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