Dr. Aviva J. Zigman, MD
- Medicare services, 2024
- 70
- Medicare patients, 2026
- 80
- Part D claims, 2026
- 2,042
- Industry payments
- $437
- Affiliated sites
- 1
- Practice address
- 9695 Base Line Rd, Rancho Cucamonga, CA 91730
- Practice phone
- Call (909) 297-3361
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Thuy T M Nguyen M D Inc
Rancho Cucamonga, California
Find Dr. Zigman'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. Aviva J. Zigman is a general practice physician in Rancho Cucamonga, California
Dr. Zigman practices at Thuy T M Nguyen M D Inc in Rancho Cucamonga, California.
Dr. Zigman's NPI, 1013970060, was assigned on April 10, 2006. Dr. Zigman holds Oregon license MD23025.
- NPI
- 1013970060NPI Registry (opens in a new tab)
- NPI enumeration date
- April 10, 2006
- NPI status
- Active
- Practice phone
- (909) 297-3361
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Aviva J. Zigman practices at Thuy T M Nguyen M D Inc in Rancho Cucamonga, California
Dr. Zigman's primary practice is Thuy T M Nguyen M D Inc, at 9695 Base Line Rd, Rancho Cucamonga, CA 91730 in San Bernardino County. The practice phone is (909) 297-3361.
- Thuy T M Nguyen M D Inc9695 Base Line Rd, Rancho Cucamonga, CA 91730 · San Bernardino CountyPhone(909) 297-3361
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Aviva J. Zigman is affiliated with 2 sites of care and 5 medical groups
Dr. Zigman's primary practice is Thuy T M Nguyen M D Inc in Rancho Cucamonga, California. The medical group on file is Vituity. Dmand AI also links Dr. Zigman to 4 more medical groups and 1 group practice or clinic, 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. Aviva J. Zigman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zigman practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Thuy T M Nguyen M D Inc | Available with a free account |
| +1 more site and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Aviva J. Zigman is one of 1,526 general practice physicians in California
General practice is Dr. Zigman's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dmand AI has Dr. Zigman's licenses on file in 2 states: Oregon and Washington.
Specialties and state licenses
- General practice, OregonPrimary
- Washington license
General practice physicians near Dr. Zigman
Counts of general practice physicians 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. Aviva J. Zigman billed Medicare for 70 services in 2024
CMS data shows 70 Medicare services from Dr. Zigman across 4 procedure codes in 2024, for 80 Medicare patients. Medicare paid $8,174 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Zigman's Medicare services by type, 2021 to 2024
- 2021
- 2024
- Office and hospital visits
- 2021: 152024: 70367%
Dr. Zigman compared with the California median for general practice physicians, 2024
- Dr. Zigman
- California median
- Medicare services
- 70vs 26273% below
- Medicare patients
- 80vs 13641% below
- Part D claims
- 1,577vs 1928.2 times
Medians across 1,114 general practice physicians in California with Dmand AI profiles that report each measure.
Dr. Zigman'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Aviva J. Zigman treated 80 Medicare patients in 2026, average age 81
CMS counts 80 Medicare patients who saw Dr. Zigman in 2026. The largest group is 75 to 84, with 34 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 34% are also on Medicaid. Their average risk score is 1.95, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Zigman's median patient age at 76, with 100% women.
Dr. Zigman's Medicare patients by age, 2026
CMS leaves out age groups with fewer than 11 patients.
Dr. Zigman's Medicare patients by sex, 2026
- Women4961%
- Men3139%
Chronic conditions among Dr. Zigman's Medicare patients, 2026
- High blood pressure75%
- High cholesterol74%
- Heart failure51%
- Arthritis50%
- Alzheimer's and dementia46%
- Chronic kidney disease44%
- Mood disorders44%
- Atrial fibrillation43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zigman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women100%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2026 data
Dr. Aviva J. Zigman wrote 2,042 Medicare Part D claims in 2026
In 2026, Dr. Zigman wrote 2,042 Medicare Part D claims for 117 patients. 86% of them were for generic drugs. CMS names the drug for 1,577 of them, across 49 drugs with 11 or more claims each, at $82,196 in total drug cost. In 2023, CMS named 19 claims across 1 drug.
Dr. Zigman's Part D claims by kind of drug, 2026
- Generic1,764 claims86%
- Brand-name and other278 claims14%
Dr. Zigman'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.
Drug classes CMS tracks in Dr. Zigman's Part D claims, 2026
- Opioids3%61 of 2,042 claims
- Antibiotics2%45 of 2,042 claims
- Antipsychotics, patients 65 and over4%83 of 2,042 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 192024: 1,5778200%
Drugs named by CMS: 49 in 2024, 1 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), 2026 data
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Dr. Aviva J. Zigman received $437 in industry payments from 2021 to 2025
CMS Open Payments shows 10 general payments to Dr. Zigman from 5 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 100% of the total. Merz North America, Inc. paid the most, $152.
General payments to Dr. Zigman by program year, 2021 to 2025
Companies that paid Dr. Zigman the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Aviva J. Zigman'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) |
| 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. Aviva J. Zigman
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. Aviva J. Zigman's NPI number?
Dr. Aviva J. Zigman's NPI number is 1013970060. It was assigned on April 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Aviva J. Zigman?
Dr. Aviva J. Zigman is a general practice physician in Rancho Cucamonga, California. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Aviva J. Zigman practice?
Dr. Zigman practices at 9695 Base Line Rd, Rancho Cucamonga, CA 91730. Dr. Zigman's primary practice is Thuy T M Nguyen M D Inc in Rancho Cucamonga, California. Dmand AI also links Dr. Zigman to 4 medical groups and 1 group practice or clinic, and a free account names each one.
What is Dr. Aviva J. Zigman's office phone number?
The practice phone on file for Dr. Zigman is (909) 297-3361. Dmand AI also checks direct phone and mobile numbers, available with a free account.
What is Dr. Aviva J. Zigman's email address?
Dmand AI checks professional and personal email addresses for Dr. Zigman through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. Aviva J. Zigman's medical license number?
Dr. Zigman holds Oregon license MD23025, one of the licenses on file in 2 states.
Which states has Dr. Aviva J. Zigman been licensed in?
Dmand AI has state licenses on file for Dr. Zigman in Oregon and Washington.
What medical group is Dr. Aviva J. Zigman part of?
Dr. Zigman is linked to Vituity. Dmand AI links Dr. Zigman to 4 more medical groups, named with a free account.
Who does Dr. Aviva J. Zigman practice with?
Dmand AI links 1,897 HCPs to Dr. Zigman's primary medical group, 5 of them general practice physicians. A free account lists them, with verified contacts.
Does Dr. Aviva J. Zigman accept Medicare?
Yes. CMS data shows Dr. Zigman billed Medicare for 70 services in 2024.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Aviva J. Zigman see?
CMS counts 80 Medicare patients who saw Dr. Zigman in 2026, with an average age of 81.
What services does Dr. Aviva J. Zigman bill to Medicare?
In 2024, Dr. Zigman's most billed Medicare services were nursing facility care (99306), nursing facility care (99310) and nursing facility care (99309).
What drugs does Dr. Aviva J. Zigman prescribe most?
In 2024 Medicare Part D data, Dr. Zigman's most prescribed drugs by claims were Atorvastatin Calcium, Potassium Chloride and Eliquis.
Has Dr. Aviva J. Zigman received payments from drug or device companies?
CMS Open Payments shows $437 in general payments to Dr. Zigman from 5 companies from 2021 to 2025. The largest total came from Merz North America, Inc.
How long has Dr. Aviva J. Zigman been practicing?
Dr. Zigman graduated from medical school in 1993, 33 years ago.
What EHR does Dr. Aviva J. Zigman's practice use?
Dmand AI tracks the EHR system at Thuy T M Nguyen M D Inc and at 1 more site and 4 medical groups. The vendor and product are available with a free Dmand AI account.
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