Lois Onsum
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 1716 W Holt Ave, Pomona, CA 91768
- Practice phone
- Call (909) 623-9301
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Foundation Laboratory
Clinical Lab - Full Service · Pomona, California
Find Lois Onsum'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.
Lois Onsum is a mental health counselor in Pomona, California
Lois Onsum practices at Foundation Laboratory in Pomona, California.
Lois Onsum's NPI, 1902837008, was assigned on July 6, 2006. Lois Onsum holds California license MFC20278.
- NPI
- 1902837008NPI Registry (opens in a new tab)
- NPI enumeration date
- July 6, 2006
- NPI status
- Active
- Practice phone
- (909) 623-9301
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Lois Onsum practices at Foundation Laboratory in Pomona, California
Lois Onsum's primary practice is Foundation Laboratory, at 1716 W Holt Ave, Pomona, CA 91768. The practice phone is (909) 623-9301.
- Foundation Laboratory1716 W Holt Ave, Pomona, CA 91768Phone(909) 623-9301
Source: Dmand AI Affiliation Data
Lois Onsum is affiliated with 1 site of care
Lois Onsum's primary practice is Foundation Laboratory in Pomona, California.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Lois Onsum's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Lois Onsum practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Foundation Laboratory | Available with a free account |
Source: Dmand AI Technology Install Data
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Lois Onsum is one of 2,505 mental health counselors in California
Mental health is Lois Onsum's primary specialty in the NPI Registry, under taxonomy code 101YM0800X. Lois Onsum is licensed in California.
Specialties and state licenses
- Mental health counselor, CaliforniaPrimary
Mental health counselors near Lois Onsum
Counts of mental health counselors 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
Lois Onsum's patients have a median age of 40
Across all payers, Dmand AI patient panel data puts Lois Onsum's median patient age at 40, with 81% women.
Lois Onsum's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 40
Patient panel by sex, all payers
- Women81%
- Men19%
Source: Dmand AI Patient Panel Data
Sources for Lois Onsum'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 Lois Onsum
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Lois Onsum's NPI number?
Lois Onsum's NPI number is 1902837008. It was assigned on July 6, 2006, and it is active in the NPI Registry.
What does Lois Onsum specialize in?
Lois Onsum is a mental health counselor in Pomona, California. The primary specialty in the NPI Registry is Mental Health Counselor (taxonomy code 101YM0800X).
Where does Lois Onsum practice?
Lois Onsum practices at 1716 W Holt Ave, Pomona, CA 91768. Lois Onsum's primary practice is Foundation Laboratory in Pomona, California.
What is Lois Onsum's office phone number?
The practice phone on file for Lois Onsum is (909) 623-9301.
What is Lois Onsum's medical license number?
Lois Onsum holds California license MFC20278.
How long has Lois Onsum been practicing?
Lois Onsum's NPI was assigned in 2006.
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