David J. Liem, OD
- Medicare patients, 2024
- 60
- Part D claims, 2024
- 31
- Industry payments
- $152
- Affiliated sites
- 1
- State license
- 1
- Practice address
- 1038 E Bastanchury Rd, Fullerton, CA 92835
- Practice phone
- Call (562) 698-0811
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Andrew Imparato Inc
Fullerton, California
Find David Liem'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.
David J. Liem is an optometrist in Fullerton, California
David Liem practices at Andrew Imparato Inc in Fullerton, California.
David Liem's NPI, 1982932877, was assigned on December 3, 2009. David Liem graduated from Illinois College of Optometry at Chicago in 2001. David Liem holds California license 11793T.
- NPI
- 1982932877NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7911955315
- NPI enumeration date
- December 3, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (562) 698-0811
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
David J. Liem practices at Andrew Imparato Inc in Fullerton, California
David Liem's primary practice is Andrew Imparato Inc, at 1038 E Bastanchury Rd, Fullerton, CA 92835 in Orange County. The practice phone is (562) 698-0811.
- Andrew Imparato Inc1038 E Bastanchury Rd, Fullerton, CA 92835 · Orange CountyPhone(562) 698-0811
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
David J. Liem is affiliated with 2 sites of care
David Liem's primary practice is Andrew Imparato Inc in Fullerton, California. Dmand AI also links David Liem to 1 physician office, 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 David J. Liem's practice
Dmand AI tracks the electronic health record (EHR) system at each site where David Liem practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Andrew Imparato 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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David J. Liem is one of 7,206 optometrists in California
Optometrist is David Liem's primary specialty in the NPI Registry, under taxonomy code 152W00000X. David Liem is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near David Liem
Counts of optometrists 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
David J. Liem treated 60 Medicare patients in 2024, average age 76
CMS counts 60 Medicare patients who saw David Liem in 2024. The largest group is 65 to 74, with 29 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.00, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts David Liem's median patient age at 53, with 53% women.
David Liem's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
David Liem's Medicare patients by sex, 2024
- Women3558%
- Men2542%
Chronic conditions among David Liem's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Diabetes40%
- Osteoporosis25%
- Cancer23%
- Depression23%
- Mood disorders23%
Share of Medicare patients with each condition. A patient can have several.
David Liem's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
David J. Liem wrote 31 Medicare Part D claims in 2024
In 2024, David Liem wrote 31 Medicare Part D claims.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How David J. Liem takes part in Medicare
David Liem 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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David J. Liem received $152 in industry payments in 2025
CMS Open Payments shows 4 general payments to David Liem from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. CooperVision Inc. paid the most, $118.
Companies that paid David Liem the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
David J. Liem graduated from Illinois College of Optometry at Chicago
David Liem graduated from Illinois College of Optometry at Chicago in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for David J. Liem'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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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 David J. Liem
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is David J. Liem's NPI number?
David J. Liem's NPI number is 1982932877. It was assigned on December 3, 2009, and it is active in the NPI Registry.
What does David J. Liem specialize in?
David J. Liem is an optometrist in Fullerton, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does David J. Liem practice?
David Liem practices at 1038 E Bastanchury Rd, Fullerton, CA 92835. David Liem's primary practice is Andrew Imparato Inc in Fullerton, California. Dmand AI also links David Liem to 1 physician office.
What is David J. Liem's office phone number?
The practice phone on file for David Liem is (562) 698-0811.
What is David J. Liem's medical license number?
David Liem holds California license 11793T.
Does David J. Liem accept Medicare?
Yes. CMS lists David Liem as accepting Medicare assignment.
How many Medicare patients does David J. Liem see?
CMS counts 60 Medicare patients who saw David Liem in 2024, with an average age of 76.
Where did David J. Liem go to medical school?
David Liem graduated from Illinois College of Optometry at Chicago in 2001.
Has David J. Liem received payments from drug or device companies?
CMS Open Payments shows $152 in general payments to David Liem from 2 companies from 2025 to 2025. The largest total came from CooperVision Inc.
How long has David J. Liem been practicing?
David Liem graduated from medical school in 2001, 25 years ago.
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