Dr. David M. Ringold, MD
- Medicare services, 2024
- 28,271
- Medicare patients, 2024
- 506
- Part D claims, 2024
- 6,495
- Hospital affiliations
- 5
- Industry payments
- $494
- Practice address
- 435 Oakmead Parkway, Sunnyvale, CA 94085
- Practice phone
- Call (800) 800-5655
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ascend Clinical
Clinical Lab - Full Service · Sunnyvale, California
Find Dr. Ringold'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. David M. Ringold is a nephrologist in Sunnyvale, California
Dr. Ringold practices at Ascend Clinical in Sunnyvale, California.
Dr. Ringold's NPI, 1912967118, was assigned on March 23, 2006. Dr. Ringold graduated from University of Iowa, RJ & L Carver College of Medicine in 1999. Dr. Ringold holds Iowa license 34708.
- NPI
- 1912967118NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8729061510
- NPI enumeration date
- March 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (800) 800-5655
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David M. Ringold practices at Ascend Clinical in Sunnyvale, California
Dr. Ringold's primary practice is Ascend Clinical, at 435 Oakmead Parkway, Sunnyvale, CA 94085. The practice phone is (800) 800-5655.
- Ascend Clinical435 Oakmead Parkway, Sunnyvale, CA 94085Phone(800) 800-5655
Source: Dmand AI Affiliation Data
Dr. David M. Ringold is affiliated with 12 sites of care and 2 medical groups
Dr. Ringold's primary practice is Ascend Clinical in Sunnyvale, California. Dr. Ringold is also affiliated with UnityPoint Health - Finley Hospital. The medical group on file is UnityPoint Clinic. Dmand AI also links Dr. Ringold to 4 more hospitals, 5 dialysis centers, 1 physician office and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. David M. Ringold's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ringold practices, 12 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ascend Clinical | Available with a free account |
| +11 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David M. Ringold is one of 1,401 nephrologists in California
Nephrology is Dr. Ringold's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dmand AI has Dr. Ringold's licenses on file in 2 states: Iowa and Wisconsin.
Specialties and state licenses
- Nephrology, IowaPrimary
- Wisconsin license
Nephrologists near Dr. Ringold
Counts of nephrologists 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. David M. Ringold billed Medicare for 28,271 services in 2024
CMS data shows 28,271 Medicare services from Dr. Ringold across 36 procedure codes in 2024, for 506 Medicare patients. Medicare paid $293,073 for them.
Dr. Ringold's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 25,3382024: 23,8686%
- Lab and pathology
- 2023: 1,6222024: 1,79911%
- Office and hospital visits
- 2023: 9672024: 1,11515%
- Tests and treatments
- 2023: 1,1502024: 72937%
- Other services
- 2023: 02024: 377
- Surgery
- 2023: 2922024: 35823%
- Imaging
- 2023: 192024: 2532%
Where Dr. Ringold's Medicare services took place, 2024
- In an office27,75598%
- In a facility5162%
Dr. Ringold compared with the California median for nephrologists, 2024
- Dr. Ringold
- California median
- Medicare services
- 28,271vs 1,08426.1 times
- Medicare patients
- 506vs 30765% above
- Part D claims
- 6,126vs 9556.4 times
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Ringold'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. Ringold and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David M. Ringold treated 506 Medicare patients in 2024, average age 74
CMS counts 506 Medicare patients who saw Dr. Ringold in 2024. The largest group is 65 to 74, with 206 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 22% are also on Medicaid. Their average risk score is 3.03, 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. Ringold's median patient age at 76, with 47% women.
Dr. Ringold's Medicare patients by age, 2024
Dr. Ringold's Medicare patients by sex, 2024
- Women24448%
- Men26252%
Chronic conditions among Dr. Ringold's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes53%
- Arthritis39%
- Heart failure39%
- Ischemic heart disease37%
- Atrial fibrillation32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ringold'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
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David M. Ringold wrote 6,495 Medicare Part D claims in 2024
In 2024, Dr. Ringold wrote 6,495 Medicare Part D claims for 756 patients. 86% of them were for generic drugs. CMS names the drug for 6,126 of them, across 84 drugs with 11 or more claims each, at $670,284 in total drug cost. In 2023, CMS named 5,110 claims across 80 drugs.
Dr. Ringold's Part D claims by kind of drug, 2024
- Generic5,615 claims86%
- Brand-name and other880 claims14%
Dr. Ringold'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. Ringold's Part D claims, 2024
- Antibiotics4%267 of 6,495 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: 5,1102024: 6,12620%
Drugs named by CMS: 84 in 2024, 80 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
How Dr. David M. Ringold takes part in Medicare
Dr. Ringold 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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Dr. David M. Ringold received $494 in industry payments from 2017 to 2025
CMS Open Payments shows 25 general payments to Dr. Ringold from 9 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 99% of the total. AstraZeneca Pharmaceuticals LP paid the most, $116.
General payments to Dr. Ringold by program year, 2017 to 2025
General payments to Dr. Ringold by kind, 2017 to 2025
- Food and beverage$49199%
- Education$21%
Companies that paid Dr. Ringold the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. David M. Ringold graduated from University of Iowa, RJ & L Carver College of Medicine
Dr. Ringold graduated from University of Iowa, RJ & L Carver College of Medicine in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. David M. Ringold'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 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) |
| 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 Dr. David M. Ringold
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. David M. Ringold's NPI number?
Dr. David M. Ringold's NPI number is 1912967118. It was assigned on March 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. David M. Ringold?
Dr. David M. Ringold is a nephrologist in Sunnyvale, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. David M. Ringold practice?
Dr. Ringold practices at 435 Oakmead Parkway, Sunnyvale, CA 94085. Dr. Ringold's primary practice is Ascend Clinical in Sunnyvale, California. Dmand AI also links Dr. Ringold to 4 hospitals, 5 dialysis centers, 1 physician office and 1 medical group.
What is Dr. David M. Ringold's office phone number?
The practice phone on file for Dr. Ringold is (800) 800-5655.
What is Dr. David M. Ringold's medical license number?
Dr. Ringold holds Iowa license 34708, one of the licenses on file in 2 states.
Which states has Dr. David M. Ringold been licensed in?
Dmand AI has state licenses on file for Dr. Ringold in Iowa and Wisconsin.
Which hospitals is Dr. David M. Ringold affiliated with?
Dr. Ringold is affiliated with UnityPoint Health - Finley Hospital. Dmand AI links Dr. Ringold to 4 more hospitals.
What medical group is Dr. David M. Ringold part of?
Dr. Ringold is linked to UnityPoint Clinic. Dmand AI links Dr. Ringold to 1 more medical group.
Does Dr. David M. Ringold accept Medicare?
Yes. CMS data shows Dr. Ringold billed Medicare for 28,271 services in 2024, and Dr. Ringold accepts Medicare assignment.
How many Medicare patients does Dr. David M. Ringold see?
CMS counts 506 Medicare patients who saw Dr. Ringold in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Dr. David M. Ringold bill to Medicare?
In 2024, Dr. Ringold's most billed Medicare services were injected or infused drug (J0881), office visit, established patient (99214) and dialysis (90960).
Where did Dr. David M. Ringold go to medical school?
Dr. Ringold graduated from University of Iowa, RJ & L Carver College of Medicine in 1999.
What drugs does Dr. David M. Ringold prescribe most?
In 2024 Medicare Part D data, Dr. Ringold's most prescribed drugs by claims were Furosemide, Irbesartan and Amlodipine Besylate.
Has Dr. David M. Ringold received payments from drug or device companies?
CMS Open Payments shows $494 in general payments to Dr. Ringold from 9 companies from 2017 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. David M. Ringold been practicing?
Dr. Ringold graduated from medical school in 1999, 27 years ago.
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