Diadema G. Barefield, APRN
- Medicare services, 2024
- 1,851
- Medicare patients, 2024
- 311
- Part D claims, 2024
- 781
- Industry payments
- $465
- Affiliated sites
- 2
- Practice address
- 900 E Hamilton Ave, Campbell, CA 95008
- Practice phone
- Call (469) 466-7007
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Signify Health
Campbell, California
Find Diadema Barefield's professional email, personal email and mobile number
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Diadema G. Barefield is a nurse practitioner in Campbell, California
Diadema Barefield practices at Signify Health in Campbell, California.
Diadema Barefield's NPI, 1407424294, was assigned on June 16, 2021. Diadema Barefield holds Florida license 11013020.
- NPI
- 1407424294NPI Registry (opens in a new tab)
- NPI enumeration date
- June 16, 2021
- NPI status
- Active
- Practice phone
- (469) 466-7007
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Diadema G. Barefield practices at Signify Health in Campbell, California
Diadema Barefield's primary practice is Signify Health, at 900 E Hamilton Ave, Campbell, CA 95008 in Santa Clara County. The practice phone is (469) 466-7007.
- Signify Health900 E Hamilton Ave, Campbell, CA 95008 · Santa Clara CountyPhone(469) 466-7007
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Diadema G. Barefield is affiliated with 3 sites of care and 2 medical groups
Diadema Barefield's primary practice is Signify Health in Campbell, California. The medical group on file is Clearway Pain Solutions. Dmand AI also links Diadema Barefield to 1 more physician office, 1 skilled nursing facility and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Diadema G. Barefield's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Diadema Barefield practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Signify Health | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Diadema G. Barefield is one of 5,983 nurse practitioners in California
Nurse practitioner is Diadema Barefield's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Diadema Barefield is licensed in Florida.
Specialties and state licenses
- Nurse practitioner, FloridaPrimary
Clinical focus
Dmand AI lists arthritis, fibromyalgia and chronic pain, insomnia, joint pain, lower back pain, muscle pain, fibromyalgia, and limb pain and neck pain and spine problems among the conditions Diadema Barefield treats.
Nurse practitioners near Diadema Barefield
Counts of 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
Diadema G. Barefield billed Medicare for 1,851 services in 2024
CMS data shows 1,851 Medicare services from Diadema Barefield across 9 procedure codes in 2024, for 311 Medicare patients. Medicare paid $130,856 for them. Every service was in an office.
Diadema Barefield's Medicare services by type, 2024
- Office and hospital visits1,364
- Surgery367
- Lab and pathology60
- Other services60
Diadema Barefield compared with the California median for nurse practitioners, 2024
- Diadema Barefield
- California median
- Medicare services
- 1,851vs 2796.6 times
- Medicare patients
- 311vs 923.4 times
- Part D claims
- 722vs 36697% above
Medians across 3,047 nurse practitioners in California with Dmand AI profiles that report each measure.
Diadema Barefield'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 Diadema Barefield and other nurse practitioners in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Diadema G. Barefield treated 311 Medicare patients in 2024, average age 72
CMS counts 311 Medicare patients who saw Diadema Barefield in 2024. The largest group is 65 to 74, with 116 patients. 75% of them have arthritis, and 75% have high blood pressure. 43% are also on Medicaid. Their average risk score is 2.29, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Diadema Barefield's median patient age at 71, with 49% women.
Diadema Barefield's Medicare patients by age, 2024
Diadema Barefield's Medicare patients by sex, 2024
- Women18259%
- Men12941%
Chronic conditions among Diadema Barefield's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders54%
- Diabetes52%
- Depression49%
- Anxiety47%
- Chronic kidney disease39%
Share of Medicare patients with each condition. A patient can have several.
Diadema Barefield'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
- Women49%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Diadema G. Barefield wrote 781 Medicare Part D claims in 2024
In 2024, Diadema Barefield wrote 781 Medicare Part D claims for 233 patients. 97% of them were for generic drugs. CMS names the drug for 722 of them, across 15 drugs with 11 or more claims each, at $19,557 in total drug cost.
Diadema Barefield's Part D claims by kind of drug, 2024
- Generic757 claims97%
- Brand-name24 claims3%
Diadema Barefield'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
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Diadema G. Barefield received $465 in industry payments from 2024 to 2025
CMS Open Payments shows 14 general payments to Diadema Barefield from 6 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Nevro Corp. paid the most, $182.
General payments to Diadema Barefield by program year, 2024 to 2025
Companies that paid Diadema Barefield 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 Diadema G. Barefield'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 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) |
| 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 Diadema G. Barefield
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Diadema G. Barefield's NPI number?
Diadema G. Barefield's NPI number is 1407424294. It was assigned on June 16, 2021, and it is active in the NPI Registry.
What does Diadema G. Barefield specialize in?
Diadema G. Barefield is a nurse practitioner in Campbell, California. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Diadema G. Barefield practice?
Diadema Barefield practices at 900 E Hamilton Ave, Campbell, CA 95008. Diadema Barefield's primary practice is Signify Health in Campbell, California. Dmand AI also links Diadema Barefield to 1 physician office, 1 skilled nursing facility and 1 medical group.
What is Diadema G. Barefield's office phone number?
The practice phone on file for Diadema Barefield is (469) 466-7007.
What is Diadema G. Barefield's medical license number?
Diadema Barefield holds Florida license 11013020.
What medical group is Diadema G. Barefield part of?
Diadema Barefield is linked to Clearway Pain Solutions. Dmand AI links Diadema Barefield to 1 more medical group.
Does Diadema G. Barefield accept Medicare?
Yes. CMS data shows Diadema Barefield billed Medicare for 1,851 services in 2024.
How many Medicare patients does Diadema G. Barefield see?
CMS counts 311 Medicare patients who saw Diadema Barefield in 2024, with an average age of 72.
What services does Diadema G. Barefield bill to Medicare?
In 2024, Diadema Barefield's most billed Medicare services were nursing facility care (99309), nursing facility care (99308) and surgery: skin and soft tissue (11045).
What drugs does Diadema G. Barefield prescribe most?
In 2024 Medicare Part D data, Diadema Barefield's most prescribed drugs by claims were Gabapentin, Tizanidine HCl and Cyclobenzaprine HCl.
Has Diadema G. Barefield received payments from drug or device companies?
CMS Open Payments shows $465 in general payments to Diadema Barefield from 6 companies from 2024 to 2025. The largest total came from Nevro Corp.
How long has Diadema G. Barefield been practicing?
Diadema Barefield graduated from medical school in 2020, 6 years ago.
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