Dr. Michael A. Ruiz, MD
- Industry payments
- $382
- Affiliated sites
- 3
- Medical groups
- 2
- Insurance carriers
- 11
- State licenses
- 2
- Practice address
- 1450 Treat Blvd, Walnut Creek, CA 94597
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
John Muir Medical Center - Walnut C - Imaging - HOPD
Acute Care Hospital outpatient department · Walnut Creek, California
Find Dr. Ruiz'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. Michael A. Ruiz is a pediatrician in Walnut Creek, California
Dr. Ruiz practices at John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California.
Dr. Ruiz's NPI, 1588632673, was assigned on March 14, 2006. Dr. Ruiz graduated from Harvard Medical School in 1996. Dr. Ruiz holds California license A64848.
- NPI
- 1588632673NPI Registry (opens in a new tab)
- NPI enumeration date
- March 14, 2006
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Michael A. Ruiz practices at John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California
Dr. Ruiz's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD, at 1450 Treat Blvd, Walnut Creek, CA 94597.
- John Muir Medical Center - Walnut C - Imaging - HOPD1450 Treat Blvd, Walnut Creek, CA 94597
Source: Dmand AI Affiliation Data
Dr. Michael A. Ruiz is affiliated with 3 sites of care and 2 medical groups
Dr. Ruiz's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California. The medical group on file is John Muir Medical Group. Dmand AI also links Dr. Ruiz to 2 more group practices and clinics and 1 medical group, each named with a free account. Dr. Ruiz's employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Michael A. Ruiz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ruiz practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John Muir Medical Center - Walnut C - Imaging - HOPD | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael A. Ruiz is one of 8,236 pediatricians in California
Pediatrics is Dr. Ruiz's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Ruiz is board certified in pediatrics by the American Board of Pediatrics. Dmand AI has Dr. Ruiz's licenses on file in 2 states: California and Maryland.
Specialties and state licenses
- Pediatrics, CaliforniaPrimary
- Maryland license
Pediatricians near Dr. Ruiz
Counts of pediatricians 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. Michael A. Ruiz's patients have a median age of 13
Across all payers, Dmand AI patient panel data puts Dr. Ruiz's median patient age at 13, with 28% women.
Dr. Ruiz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 13
Patient panel by sex, all payers
- Women28%
- Men71%
Source: Dmand AI Patient Panel Data
Dr. Michael A. Ruiz received $382 in industry payments from 2017 to 2025
CMS Open Payments shows 16 general payments to Dr. Ruiz from 10 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $147.
General payments to Dr. Ruiz by program year, 2017 to 2025
Companies that paid Dr. Ruiz the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael A. Ruiz has 1 award and honors on record
Dmand AI lists 1 award for Dr. Ruiz.
Awards and honors for Dr. Ruiz
- Undated
- AAP Fellow
Source: Dmand AI Professional Profile Data
Dr. Michael A. Ruiz graduated from Harvard Medical School
Dr. Ruiz graduated from Harvard Medical School in 1996. Dr. Ruiz is a member of AAP.
- Medical school
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Dr. Michael A. Ruiz accepts plans from 11 insurance carriers
Dr. Ruiz is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Elevance
- Regence Health Plans
- Alliant Health Plans
- +3 more carriersWith a free account
Plan types Dr. Ruiz accepts, by number of carriers
- PPO7
- HMO6
- Medicare6
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael A. Ruiz'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 Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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. Michael A. Ruiz
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. Michael A. Ruiz's NPI number?
Dr. Michael A. Ruiz's NPI number is 1588632673. It was assigned on March 14, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael A. Ruiz?
Dr. Michael A. Ruiz is a pediatrician in Walnut Creek, California. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. Michael A. Ruiz practice?
Dr. Ruiz practices at 1450 Treat Blvd, Walnut Creek, CA 94597. Dr. Ruiz's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California. Dmand AI also links Dr. Ruiz to 2 group practices and clinics and 1 medical group.
What is Dr. Michael A. Ruiz's medical license number?
Dr. Ruiz holds California license A64848, one of the licenses on file in 2 states.
Which states has Dr. Michael A. Ruiz been licensed in?
Dmand AI has state licenses on file for Dr. Ruiz in California (1998 to 2026) and Maryland (1999 to 2003).
What medical group is Dr. Michael A. Ruiz part of?
Dr. Ruiz is linked to John Muir Medical Group. Dmand AI links Dr. Ruiz to 1 more medical group.
Is Dr. Michael A. Ruiz board certified?
Yes. Dr. Ruiz is board certified in pediatrics by the American Board of Pediatrics.
Where did Dr. Michael A. Ruiz go to medical school?
Dr. Ruiz graduated from Harvard Medical School in 1996.
Has Dr. Michael A. Ruiz received payments from drug or device companies?
CMS Open Payments shows $382 in general payments to Dr. Ruiz from 10 companies from 2017 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Michael A. Ruiz been practicing?
Dr. Ruiz graduated from medical school in 1996, 30 years ago.
What insurance does Dr. Michael A. Ruiz accept?
Dr. Ruiz is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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