Dr. Stella C. Sien, DO
- Hospital affiliations
- 2
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2009
- Practice address
- 3440 E La Palma Ave, Anaheim, CA 92806
- Practice phone
- Call (714) 279-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Sien'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. Stella C. Sien is an OB-GYN in Anaheim, California
Dr. Sien practices at Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente.
Dr. Sien's NPI, 1558592444, was assigned on July 27, 2009. Dr. Sien holds California license 20A9946.
- NPI
- 1558592444NPI Registry (opens in a new tab)
- NPI enumeration date
- July 27, 2009
- NPI status
- Active
- Practice phone
- (714) 279-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Stella C. Sien practices at Orange County - Anaheim Medical Center in Anaheim, California
Dr. Sien's primary practice is Orange County - Anaheim Medical Center, at 3440 E La Palma Ave, Anaheim, CA 92806 in Orange County. The practice phone is (714) 279-4000.
- Orange County - Anaheim Medical Center3440 E La Palma Ave, Anaheim, CA 92806 · Orange CountyPhone(714) 279-4000
Source: Dmand AI Affiliation Data
Dr. Stella C. Sien is affiliated with 2 sites of care and 1 medical group
Dr. Sien's primary practice is Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente. Dr. Sien is also affiliated with Arrowhead Regional Medical Center. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stella C. Sien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sien practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Orange County - Anaheim Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Stella C. Sien is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Sien's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Sien is licensed in California.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
OB-GYNs near Dr. Sien
Counts of OB-GYNs 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. Stella C. Sien's patients have a median age of 31
Across all payers, Dmand AI patient panel data puts Dr. Sien's median patient age at 31, with 100% women.
Dr. Sien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 31
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Sources for Dr. Stella C. Sien'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 DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel 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. Stella C. Sien
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. Stella C. Sien's NPI number?
Dr. Stella C. Sien's NPI number is 1558592444. It was assigned on July 27, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Stella C. Sien?
Dr. Stella C. Sien is an OB-GYN in Anaheim, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Stella C. Sien practice?
Dr. Sien practices at 3440 E La Palma Ave, Anaheim, CA 92806. Dr. Sien's primary practice is Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente.
What is Dr. Stella C. Sien's office phone number?
The practice phone on file for Dr. Sien is (714) 279-4000.
What is Dr. Stella C. Sien's medical license number?
Dr. Sien holds California license 20A9946.
Which hospitals is Dr. Stella C. Sien affiliated with?
Dr. Sien practices at Orange County - Anaheim Medical Center in Anaheim, California. Dr. Sien is also affiliated with Arrowhead Regional Medical Center.
What medical group is Dr. Stella C. Sien part of?
Dr. Sien is linked to Southern California Permanente Medical Group.
How long has Dr. Stella C. Sien been practicing?
Dr. Sien graduated from medical school in 2005, 21 years ago.
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