Dr. Lida Zhen, MD
- Medicare services, 2024
- 356
- Medicare patients, 2024
- 40
- Part D claims, 2024
- 286
- Hospital affiliations
- 2
- Industry payments
- $4,919
- Practice address
- 8945 Magnolia Ave, Riverside, CA 92503
- Practice phone
- Call (951) 688-7270
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Glenwood Surgery Center LP
Riverside, California
Find Dr. Zhen'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. Lida Zhen is a gastroenterologist in Riverside, California
Dr. Zhen practices at Glenwood Surgery Center LP in Riverside, California.
Dr. Zhen's NPI, 1942256581, was assigned on May 25, 2006. Dr. Zhen holds California license C51597.
- NPI
- 1942256581NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0143268920
- NPI enumeration date
- May 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (951) 688-7270
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Lida Zhen practices at Glenwood Surgery Center LP in Riverside, California
Dr. Zhen's primary practice is Glenwood Surgery Center LP, at 8945 Magnolia Ave, Riverside, CA 92503 in Riverside County. The practice phone is (951) 688-7270.
- Glenwood Surgery Center LP8945 Magnolia Ave, Riverside, CA 92503 · Riverside CountyPhone(951) 688-7270
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Lida Zhen is affiliated with 5 sites of care and 5 medical groups
Dr. Zhen's primary practice is Glenwood Surgery Center LP in Riverside, California. Dr. Zhen is also affiliated with Alaska Native Medical Center. The medical group on file is 24 Hour Docs. Dmand AI also links Dr. Zhen to 1 more hospital, 4 medical groups and 2 group practices and clinics, each 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. Lida Zhen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zhen practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Glenwood Surgery Center LP | Available with a free account |
| +4 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Lida Zhen is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Zhen's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Zhen is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Zhen
Counts of gastroenterologists 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. Lida Zhen billed Medicare for 356 services in 2024
CMS data shows 356 Medicare services from Dr. Zhen across 4 procedure codes in 2024, for 40 Medicare patients. Medicare paid $4,672 for them. Every service was in an office.
Dr. Zhen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 6242024: 33347%
- Other services
- 2023: 722024: 2368%
- Surgery
- 2023: 232024: 0100%
Dr. Zhen compared with the California median for gastroenterologists, 2024
- Dr. Zhen
- California median
- Medicare services
- 356vs 58639% below
- Medicare patients
- 40vs 30287% below
- Part D claims
- 241vs 38037% below
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Zhen's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zhen and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Lida Zhen treated 40 Medicare patients in 2024, average age 71
CMS counts 40 Medicare patients who saw Dr. Zhen in 2024. The largest group is 65 to 74, with 26 patients. 75% of them have high cholesterol, and 73% have high blood pressure. Their average risk score is 0.79, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Zhen's median patient age at 58, with 59% women.
Dr. Zhen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Zhen's Medicare patients by sex, 2024
- Women2050%
- Men2050%
Chronic conditions among Dr. Zhen's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zhen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Lida Zhen wrote 286 Medicare Part D claims in 2024
In 2024, Dr. Zhen wrote 286 Medicare Part D claims for 235 patients. 71% of them were for generic drugs. CMS names the drug for 241 of them, across 5 drugs with 11 or more claims each, at $6,290 in total drug cost. In 2023, CMS named 222 claims across 3 drugs.
Dr. Zhen's Part D claims by kind of drug, 2024
- Generic202 claims71%
- Brand-name84 claims29%
Dr. Zhen's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2222024: 2419%
Drugs named by CMS: 5 in 2024, 3 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Lida Zhen ranks in the 53rd percentile for colonoscopy in Medicare
Dr. Zhen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 29 procedures of colonoscopy by Dr. Zhen, more than 53% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Zhen ranks in Medicare procedure volume
- Colonoscopy
- 53rd percentile29 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 47th percentile16 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Lida Zhen received $4,919 in industry payments from 2016 to 2025
CMS Open Payments shows 203 general payments to Dr. Zhen from 26 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Bausch Health Americas, Inc. paid the most, $505.
General payments to Dr. Zhen by program year, 2016 to 2025
General payments to Dr. Zhen by kind, 2016 to 2025
- Food and beverage$4,902100%
- Education$170%
Companies that paid Dr. Zhen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Lida Zhen'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 and Drug (CMS) (opens in a new tab)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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Lida Zhen
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. Lida Zhen's NPI number?
Dr. Lida Zhen's NPI number is 1942256581. It was assigned on May 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Lida Zhen?
Dr. Lida Zhen is a gastroenterologist in Riverside, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Lida Zhen practice?
Dr. Zhen practices at 8945 Magnolia Ave, Riverside, CA 92503. Dr. Zhen's primary practice is Glenwood Surgery Center LP in Riverside, California. Dmand AI also links Dr. Zhen to 1 hospital, 4 medical groups and 2 group practices and clinics.
What is Dr. Lida Zhen's office phone number?
The practice phone on file for Dr. Zhen is (951) 688-7270.
What is Dr. Lida Zhen's medical license number?
Dr. Zhen holds California license C51597.
Which hospitals is Dr. Lida Zhen affiliated with?
Dr. Zhen is affiliated with Alaska Native Medical Center. Dmand AI links Dr. Zhen to 1 more hospital.
What medical group is Dr. Lida Zhen part of?
Dr. Zhen is linked to 24 Hour Docs. Dmand AI links Dr. Zhen to 4 more medical groups.
Does Dr. Lida Zhen accept Medicare?
Yes. CMS data shows Dr. Zhen billed Medicare for 356 services in 2024, and Dr. Zhen accepts Medicare assignment.
How many Medicare patients does Dr. Lida Zhen see?
CMS counts 40 Medicare patients who saw Dr. Zhen in 2024, with an average age of 71.
What services does Dr. Lida Zhen bill to Medicare?
In 2024, Dr. Zhen's most billed Medicare services were injected or infused drug (J2250), injected or infused drug (J3010) and medicare service (G0121).
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What drugs does Dr. Lida Zhen prescribe most?
In 2024 Medicare Part D data, Dr. Zhen's most prescribed drugs by claims were Sod Sulf-Potass Sulf-Mag Sulf, Gavilyte-G and Pantoprazole Sodium.
Has Dr. Lida Zhen received payments from drug or device companies?
CMS Open Payments shows $4,919 in general payments to Dr. Zhen from 26 companies from 2016 to 2025. The largest total came from Bausch Health Americas, Inc.
How long has Dr. Lida Zhen been practicing?
Dr. Zhen graduated from medical school in 1982, 44 years ago.
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