Diana Myrna Diaz, NP
- Medicare services, 2024
- 675
- Medicare patients, 2024
- 524
- Part D claims, 2024
- 97
- Hospital affiliations
- 1
- Industry payments
- $467
- Practice address
- 1200 B Gale Wilson Blvd, Fairfield, CA 94533
- Practice phone
- Call (707) 646-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Diana Myrna Diaz is a family nurse practitioner in Fairfield, California
Diana Diaz practices at NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare.
Diana Diaz's NPI, 1396321998, was assigned on March 23, 2021. Diana Diaz holds California license 95015657.
- NPI
- 1396321998NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597173880
- NPI enumeration date
- March 23, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (707) 646-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Diana Myrna Diaz practices at NorthBay Medical Center in Fairfield, California
Diana Diaz's primary practice is NorthBay Medical Center, at 1200 B Gale Wilson Blvd, Fairfield, CA 94533 in Solano County. The practice phone is (707) 646-5000.
- NorthBay Medical Center1200 B Gale Wilson Blvd, Fairfield, CA 94533 · Solano CountyPhone(707) 646-5000
Source: Dmand AI Affiliation Data
Diana Myrna Diaz is affiliated with 1 site of care and 3 medical groups
Diana Diaz's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. The medical group on file is NorthBay Medical Center. Dmand AI also links Diana Diaz to 2 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Diana Myrna Diaz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Diana Diaz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NorthBay Medical Center | Available with a free account |
| +2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Diana Myrna Diaz is one of 13,532 family nurse practitioners in California
Family is Diana Diaz's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Diana Diaz is licensed in California.
Specialties and state licenses
- Family nurse practitioner, CaliforniaPrimary
Family nurse practitioners near Diana Diaz
Counts of family nurse practitioners 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
Diana Myrna Diaz billed Medicare for 675 services in 2024
CMS data shows 675 Medicare services from Diana Diaz across 6 procedure codes in 2024, for 524 Medicare patients. Medicare paid $53,702 for them. Every service was in an office.
Diana Diaz compared with the California median for family nurse practitioners, 2024
- Diana Diaz
- California median
- Medicare services
- 675vs 2342.9 times
- Medicare patients
- 524vs 905.8 times
- Part D claims
- 42vs 36088% below
Medians across 6,382 family nurse practitioners in California with Dmand AI profiles that report each measure.
Diana 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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Diana Myrna Diaz treated 524 Medicare patients in 2024, average age 74
CMS counts 524 Medicare patients who saw Diana Diaz in 2024. The largest group is 65 to 74, with 238 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 15% are also on Medicaid. Their average risk score is 1.03, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Diana Diaz's median patient age at 47, with 59% women.
Diana Diaz's Medicare patients by age, 2024
Diana Diaz's Medicare patients by sex, 2024
- Women24246%
- Men28254%
Chronic conditions among Diana Diaz's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis48%
- Ischemic heart disease28%
- Diabetes27%
- Atrial fibrillation20%
- Chronic kidney disease20%
- Mood disorders20%
Share of Medicare patients with each condition. A patient can have several.
Diana 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 47
Patient panel by sex, all payers
- Women59%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Diana Myrna Diaz wrote 97 Medicare Part D claims in 2024
In 2024, Diana Diaz wrote 97 Medicare Part D claims for 42 patients. 92% of them were for generic drugs. CMS names the drug for 42 of them, across 3 drugs with 11 or more claims each, at $201 in total drug cost.
Diana Diaz's Part D claims by kind of drug, 2024
- Generic89 claims92%
- Brand-name and other8 claims8%
Diana 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.
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
Diana Myrna Diaz offers telehealth to Medicare patients
Diana Diaz accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Diana Diaz as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Diana Myrna Diaz received $467 in industry payments from 2024 to 2025
CMS Open Payments shows 11 general payments to Diana Diaz from 8 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $119.
General payments to Diana Diaz by program year, 2024 to 2025
Companies that paid Diana Diaz the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Diana Myrna Diaz'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) |
| 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 Diana Myrna Diaz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Diana Myrna Diaz's NPI number?
Diana Myrna Diaz's NPI number is 1396321998. It was assigned on March 23, 2021, and it is active in the NPI Registry.
What does Diana Myrna Diaz specialize in?
Diana Myrna Diaz is a family nurse practitioner in Fairfield, California. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Diana Myrna Diaz practice?
Diana Diaz practices at 1200 B Gale Wilson Blvd, Fairfield, CA 94533. Diana Diaz's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. Dmand AI also links Diana Diaz to 2 medical groups.
What is Diana Myrna Diaz's office phone number?
The practice phone on file for Diana Diaz is (707) 646-5000.
What is Diana Myrna Diaz's medical license number?
Diana Diaz holds California license 95015657.
Which hospitals is Diana Myrna Diaz affiliated with?
Diana Diaz practices at NorthBay Medical Center in Fairfield, California.
What medical group is Diana Myrna Diaz part of?
Diana Diaz is linked to NorthBay Medical Center. Dmand AI links Diana Diaz to 2 more medical groups.
Does Diana Myrna Diaz accept Medicare?
Yes. CMS data shows Diana Diaz billed Medicare for 675 services in 2024, and Diana Diaz accepts Medicare assignment.
Does Diana Myrna Diaz offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Diana Diaz as offering telehealth services.
How many Medicare patients does Diana Myrna Diaz see?
CMS counts 524 Medicare patients who saw Diana Diaz in 2024, with an average age of 74.
Show 4 more questionsShow fewer questions
What services does Diana Myrna Diaz bill to Medicare?
In 2024, Diana Diaz's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and office visit, new patient (99205).
What drugs does Diana Myrna Diaz prescribe most?
In 2024 Medicare Part D data, Diana Diaz's most prescribed drugs by claims were Trazodone HCl, Fluticasone Propionate and Lorazepam.
Has Diana Myrna Diaz received payments from drug or device companies?
CMS Open Payments shows $467 in general payments to Diana Diaz from 8 companies from 2024 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Diana Myrna Diaz been practicing?
Diana Diaz graduated from medical school in 1994, 32 years ago.
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