Dr. Gervacio D. Diaz III, MD
- Medicare services, 2024
- 1,189
- Medicare patients, 2024
- 216
- Part D claims, 2024
- 13,392
- Hospital affiliations
- 2
- Industry payments
- $9,850
- Practice address
- 2013 Coffee Rd, Modesto, CA 95355-2405
- Practice phone
- Call (209) 529-8506
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Office of Gervacio Diaz, M.D.
Physician office · Modesto, California
Find Dr. Diaz'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. Gervacio D. Diaz III is an internist in Modesto, California
Dr. Diaz practices at Office of Gervacio Diaz, M.D. in Modesto, California.
Dr. Diaz's NPI, 1700835451, was assigned on May 9, 2006. Dr. Diaz graduated from University of Santo Tomas in 1988. Dr. Diaz holds California license A69801.
- NPI
- 1700835451NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7911906219
- NPI enumeration date
- May 9, 2006
- NPI status
- Active
- Practice phone
- (209) 529-8506
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gervacio D. Diaz III practices at Office of Gervacio Diaz, M.D. in Modesto, California
Dr. Diaz's primary practice is Office of Gervacio Diaz, M.D., at 2013 Coffee Rd, Modesto, CA 95355-2405. The practice phone is (209) 529-8506.
- Office of Gervacio Diaz, M.D.2013 Coffee Rd, Modesto, CA 95355-2405Phone(209) 529-8506
Source: Dmand AI Affiliation Data
Dr. Gervacio D. Diaz III is affiliated with 7 sites of care and 1 medical group
Dr. Diaz's primary practice is Office of Gervacio Diaz, M.D. in Modesto, California. Dr. Diaz is also affiliated with Memorial Medical Center. The medical group on file is SGMF Radiology. Dmand AI also links Dr. Diaz to 1 more hospital, 3 home health agencies and 1 group practice or clinic, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gervacio D. Diaz III's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diaz practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Office of Gervacio Diaz, M.D. | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gervacio D. Diaz III is one of 16,751 internists in California
Internal medicine is Dr. Diaz's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Diaz is board certified in internal medicine by the American Board of Internal Medicine. Dr. Diaz is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute skin infection, adjustment disease, alzheimer's disease, aneurysm, anxiety, arterial blot clot /embolism and arthritis among the conditions Dr. Diaz treats.
Internists near Dr. Diaz
Counts of internists 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. Gervacio D. Diaz III billed Medicare for 1,189 services in 2024
CMS data shows 1,189 Medicare services from Dr. Diaz across 10 procedure codes in 2024, for 216 Medicare patients. Medicare paid $60,450 for them. Every service was in an office.
Dr. Diaz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8532024: 74712%
- Other services
- 2023: 2852024: 33718%
- Tests and treatments
- 2023: 1282024: 10518%
Dr. Diaz compared with the California median for internists, 2024
- Dr. Diaz
- California median
- Medicare services
- 1,189vs 3613.3 times
- Medicare patients
- 216vs 15143% above
- Part D claims
- 12,516vs 42129.7 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Diaz'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.
Need commercial claims for Dr. Diaz?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Diaz and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gervacio D. Diaz III treated 216 Medicare patients in 2024, average age 76
CMS counts 216 Medicare patients who saw Dr. Diaz in 2024. The largest group is 65 to 74, with 89 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 5% are also on Medicaid. Their average risk score is 1.06, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Diaz's median patient age at 71, with 46% women.
Dr. Diaz's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Diaz's Medicare patients by sex, 2024
- Women11151%
- Men10549%
Chronic conditions among Dr. Diaz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Diabetes32%
- Anxiety31%
- Ischemic heart disease24%
- Alzheimer's and dementia19%
- Cancer18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Diaz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women46%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gervacio D. Diaz III wrote 13,392 Medicare Part D claims in 2024
In 2024, Dr. Diaz wrote 13,392 Medicare Part D claims for 677 patients. 90% of them were for generic drugs. CMS names the drug for 12,516 of them, across 165 drugs with 11 or more claims each, at $891,779 in total drug cost. In 2023, CMS named 11,464 claims across 156 drugs.
Dr. Diaz's Part D claims by kind of drug, 2024
- Generic12,009 claims90%
- Brand-name1,288 claims10%
- Other95 claims1%
Dr. Diaz'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. Diaz's Part D claims, 2024
- Opioids5%682 of 13,392 claims
- Antibiotics2%296 of 13,392 claims
- Antipsychotics, patients 65 and over3%351 of 13,392 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: 11,4642024: 12,5169%
Drugs named by CMS: 165 in 2024, 156 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
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Dr. Gervacio D. Diaz III received $9,850 in industry payments from 2016 to 2025
CMS Open Payments shows 611 general payments to Dr. Diaz from 38 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Novo Nordisk Inc paid the most, $2,466.
General payments to Dr. Diaz by program year, 2016 to 2025
General payments to Dr. Diaz by kind, 2016 to 2025
- Food and beverage$9,72399%
- Education$1271%
Companies that paid Dr. Diaz the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gervacio D. Diaz III graduated from University of Santo Tomas
Dr. Diaz graduated from University of Santo Tomas in 1988.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Gervacio D. Diaz III accepts plans from 11 insurance carriers
Dr. Diaz is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Blue Cross and Blue Shield of Kansas City
- +3 more carriersWith a free account
Plan types Dr. Diaz accepts, by number of carriers
- Medicare8
- PPO6
- HMO5
- POS4
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Gervacio D. Diaz III'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 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) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Gervacio D. Diaz III
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. Gervacio D. Diaz III's NPI number?
Dr. Gervacio D. Diaz III's NPI number is 1700835451. It was assigned on May 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gervacio D. Diaz III?
Dr. Gervacio D. Diaz III is an internist in Modesto, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gervacio D. Diaz III practice?
Dr. Diaz practices at 2013 Coffee Rd, Modesto, CA 95355-2405. Dr. Diaz's primary practice is Office of Gervacio Diaz, M.D. in Modesto, California. Dmand AI also links Dr. Diaz to 1 hospital, 3 home health agencies and 1 group practice or clinic.
What is Dr. Gervacio D. Diaz III's office phone number?
The practice phone on file for Dr. Diaz is (209) 529-8506.
What is Dr. Gervacio D. Diaz III's medical license number?
Dr. Diaz holds California license A69801.
Which hospitals is Dr. Gervacio D. Diaz III affiliated with?
Dr. Diaz is affiliated with Memorial Medical Center. Dmand AI links Dr. Diaz to 1 more hospital.
What medical group is Dr. Gervacio D. Diaz III part of?
Dr. Diaz is linked to SGMF Radiology.
Does Dr. Gervacio D. Diaz III accept Medicare?
Yes. CMS data shows Dr. Diaz billed Medicare for 1,189 services in 2024.
How many Medicare patients does Dr. Gervacio D. Diaz III see?
CMS counts 216 Medicare patients who saw Dr. Diaz in 2024, with an average age of 76.
Is Dr. Gervacio D. Diaz III board certified?
Yes. Dr. Diaz is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Gervacio D. Diaz III bill to Medicare?
In 2024, Dr. Diaz's most billed Medicare services were office visit, established patient (99213), medicare service (G0439) and care management and other visits (99454).
Where did Dr. Gervacio D. Diaz III go to medical school?
Dr. Diaz graduated from University of Santo Tomas in 1988.
What drugs does Dr. Gervacio D. Diaz III prescribe most?
In 2024 Medicare Part D data, Dr. Diaz's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
Has Dr. Gervacio D. Diaz III received payments from drug or device companies?
CMS Open Payments shows $9,850 in general payments to Dr. Diaz from 38 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Gervacio D. Diaz III been practicing?
Dr. Diaz graduated from medical school in 1988, 38 years ago.
What insurance does Dr. Gervacio D. Diaz III accept?
Dr. Diaz is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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