Dr. Tammy S. Chi, MD
- Industry payments
- $442
- Medical group
- 1
- Insurance carriers
- 8
- State license
- 1
- Year NPI issued
- 2007
- Practice address
- 299 W Hillcrest Dr, Thousand Oaks, CA 91360
- Practice phone
- Call (805) 497-7888
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Los Robles Pediatric Medical Group, Inc.
Thousand Oaks, California
Find Dr. Chi'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. Tammy S. Chi is a pediatrician in Thousand Oaks, California
Dr. Chi practices at Los Robles Pediatric Medical Group, Inc. in Thousand Oaks, California.
Dr. Chi's NPI, 1003945585, was assigned on March 2, 2007. Dr. Chi graduated from David Geffen School of Medicine at UCLA in 1990. Dr. Chi holds California license G84669.
- NPI
- 1003945585NPI Registry (opens in a new tab)
- NPI enumeration date
- March 2, 2007
- NPI status
- Active
- Practice phone
- (805) 497-7888
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Tammy S. Chi practices at Los Robles Pediatric Medical Group, Inc. in Thousand Oaks, California
Dr. Chi's primary practice is Los Robles Pediatric Medical Group, Inc., at 299 W Hillcrest Dr, Thousand Oaks, CA 91360 in Ventura County. The practice phone is (805) 497-7888.
- Los Robles Pediatric Medical Group, Inc.299 W Hillcrest Dr, Thousand Oaks, CA 91360 · Ventura CountyPhone(805) 497-7888
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Tammy S. Chi is affiliated with 1 site of care and 1 medical group
Dr. Chi's primary practice is Los Robles Pediatric Medical Group, Inc. in Thousand Oaks, California. Dmand AI also links Dr. Chi to 1 medical group, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Tammy S. Chi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chi practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Los Robles Pediatric Medical Group, Inc. | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Tammy S. Chi is one of 8,236 pediatricians in California
Pediatrics is Dr. Chi's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Chi is board certified in pediatrics by the American Board of Pediatrics. Dr. Chi is licensed in California.
Specialties and state licenses
- Pediatrics, CaliforniaPrimary
Pediatricians near Dr. Chi
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. Tammy S. Chi's patients have a median age of 12
Across all payers, Dmand AI patient panel data puts Dr. Chi's median patient age at 12, with 54% women.
Dr. Chi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 12
Patient panel by sex, all payers
- Women54%
- Men46%
Source: Dmand AI Patient Panel Data
Dr. Tammy S. Chi received $442 in industry payments from 2019 to 2025
CMS Open Payments shows 12 general payments to Dr. Chi from 9 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. TherapeuticsMD, Inc. paid the most, $125.
General payments to Dr. Chi by program year, 2019 to 2025
Companies that paid Dr. Chi the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Tammy S. Chi has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Chi.
Awards and honors for Dr. Chi
- Undated
- Alpha Omega Alpha
- Phi Beta Kappa
Source: Dmand AI Professional Profile Data
Dr. Tammy S. Chi graduated from David Geffen School of Medicine at UCLA
Dr. Chi graduated from David Geffen School of Medicine at UCLA in 1990. Dr. Chi is a member of AAP.
- Medical school
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Dr. Tammy S. Chi accepts plans from 8 insurance carriers
Dr. Chi is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- United Healthcare
- Blue Cross and Blue Shield of Kansas City
- Molina
Plan types Dr. Chi accepts, by number of carriers
- Medicare6
- PPO5
- HMO3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Tammy S. Chi'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 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. Tammy S. Chi
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. Tammy S. Chi's NPI number?
Dr. Tammy S. Chi's NPI number is 1003945585. It was assigned on March 2, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Tammy S. Chi?
Dr. Tammy S. Chi is a pediatrician in Thousand Oaks, California. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. Tammy S. Chi practice?
Dr. Chi practices at 299 W Hillcrest Dr, Thousand Oaks, CA 91360. Dr. Chi's primary practice is Los Robles Pediatric Medical Group, Inc. in Thousand Oaks, California. Dmand AI also links Dr. Chi to 1 medical group.
What is Dr. Tammy S. Chi's office phone number?
The practice phone on file for Dr. Chi is (805) 497-7888.
What is Dr. Tammy S. Chi's medical license number?
Dr. Chi holds California license G84669.
Is Dr. Tammy S. Chi board certified?
Yes. Dr. Chi is board certified in pediatrics by the American Board of Pediatrics.
Where did Dr. Tammy S. Chi go to medical school?
Dr. Chi graduated from David Geffen School of Medicine at UCLA in 1990.
Has Dr. Tammy S. Chi received payments from drug or device companies?
CMS Open Payments shows $442 in general payments to Dr. Chi from 9 companies from 2019 to 2025. The largest total came from TherapeuticsMD, Inc.
How long has Dr. Tammy S. Chi been practicing?
Dr. Chi graduated from medical school in 1990, 36 years ago.
What insurance does Dr. Tammy S. Chi accept?
Dr. Chi is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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