Darla R. Oak
- Medicare services, 2024
- 1,083
- Medicare patients, 2024
- 205
- Part D claims, 2024
- 1,087
- Hospital affiliations
- 3
- Medical group
- 1
- Practice address
- 18300 Roscoe Blvd, Northridge, CA 91325
- Practice phone
- Call (818) 885-8500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Darla Oak'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.
Darla R. Oak is a nurse practitioner in Northridge, California
Darla Oak practices at Dignity Health - Northridge Hospital Medical Center in Northridge, California, part of CommonSpirit Health.
Darla Oak's NPI, 1891868337, was assigned on November 15, 2006. Darla Oak holds California license 582844.
- NPI
- 1891868337NPI Registry (opens in a new tab)
- NPI enumeration date
- November 15, 2006
- NPI status
- Active
- Practice phone
- (818) 885-8500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Darla R. Oak practices at Dignity Health - Northridge Hospital Medical Center in Northridge, California
Darla Oak's primary practice is Dignity Health - Northridge Hospital Medical Center, at 18300 Roscoe Blvd, Northridge, CA 91325 in Los Angeles County. The practice phone is (818) 885-8500.
- Dignity Health - Northridge Hospital Medical Center18300 Roscoe Blvd, Northridge, CA 91325 · Los Angeles CountyPhone(818) 885-8500
Source: Dmand AI Affiliation Data
Darla R. Oak is affiliated with 3 sites of care and 1 medical group
Darla Oak's primary practice is Dignity Health - Northridge Hospital Medical Center in Northridge, California, part of CommonSpirit Health. Darla Oak is also affiliated with Joyce Eisenberg-Keefer Medical Center. The medical group on file is Los Angeles Jewish Health. Dmand AI also links Darla Oak to 1 more hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Darla R. Oak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Darla Oak practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - Northridge Hospital Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across CommonSpirit Health and 6.2K+ hospitals, with verified contacts in the same login.
Darla R. Oak is one of 5,983 nurse practitioners in California
Nurse practitioner is Darla Oak's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Darla Oak is licensed in California.
Specialties and state licenses
- Nurse practitioner, CaliforniaPrimary
Clinical focus
Dmand AI lists asthma, bladder disease, chronic diabetes, chronic kidney disease, chronic obstructive pulmonary disease (COPD), non-alzheimer's dementia (chronic) and parkinson's disease among the conditions Darla Oak treats.
Nurse practitioners near Darla Oak
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
Darla R. Oak billed Medicare for 1,083 services in 2024
CMS data shows 1,083 Medicare services from Darla Oak across 3 procedure codes in 2024, for 205 Medicare patients. Medicare paid $50,032 for them. Every service was in an office.
Darla Oak compared with the California median for nurse practitioners, 2024
- Darla Oak
- California median
- Medicare services
- 1,083vs 2793.9 times
- Medicare patients
- 205vs 922.2 times
- Part D claims
- 764vs 3662.1 times
Medians across 3,047 nurse practitioners in California with Dmand AI profiles that report each measure.
Darla Oak'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 Darla Oak?
Medicare shows one payer. Book a meeting to get commercial claims data for Darla Oak and other nurse practitioners in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Darla R. Oak treated 205 Medicare patients in 2024, average age 88
CMS counts 205 Medicare patients who saw Darla Oak in 2024. The largest group is 85 and over, with 138 patients. 75% of them have chronic kidney disease, and 75% have depression. 92% are also on Medicaid. Their average risk score is 2.45, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Darla Oak's median patient age at 89, with 75% women.
Darla Oak's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Darla Oak's Medicare patients by sex, 2024
- Women14872%
- Men5728%
Chronic conditions among Darla Oak's Medicare patients, 2024
- Chronic kidney disease75%
- Depression75%
- Heart failure75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders75%
- Alzheimer's and dementia68%
- Arthritis65%
Share of Medicare patients with each condition. A patient can have several.
Darla Oak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 89
Patient panel by sex, all payers
- Women75%
- Men25%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Darla R. Oak wrote 1,087 Medicare Part D claims in 2024
In 2024, Darla Oak wrote 1,087 Medicare Part D claims for 151 patients. 83% of them were for generic drugs. CMS names the drug for 764 of them, across 30 drugs with 11 or more claims each, at $30,668 in total drug cost.
Darla Oak's Part D claims by kind of drug, 2024
- Generic906 claims83%
- Brand-name181 claims17%
Darla Oak'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 Darla Oak's Part D claims, 2024
- Opioids4%45 of 1,087 claims
- Antibiotics6%60 of 1,087 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Sources for Darla R. Oak'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) |
| 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 Darla R. Oak
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Darla R. Oak's NPI number?
Darla R. Oak's NPI number is 1891868337. It was assigned on November 15, 2006, and it is active in the NPI Registry.
What does Darla R. Oak specialize in?
Darla R. Oak is a nurse practitioner in Northridge, California. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Darla R. Oak practice?
Darla Oak practices at 18300 Roscoe Blvd, Northridge, CA 91325. Darla Oak's primary practice is Dignity Health - Northridge Hospital Medical Center in Northridge, California, part of CommonSpirit Health. Dmand AI also links Darla Oak to 1 hospital.
What is Darla R. Oak's office phone number?
The practice phone on file for Darla Oak is (818) 885-8500.
What is Darla R. Oak's medical license number?
Darla Oak holds California license 582844.
Which hospitals is Darla R. Oak affiliated with?
Darla Oak practices at Dignity Health - Northridge Hospital Medical Center in Northridge, California. Darla Oak is also affiliated with Joyce Eisenberg-Keefer Medical Center. Dmand AI links Darla Oak to 1 more hospital.
What medical group is Darla R. Oak part of?
Darla Oak is linked to Los Angeles Jewish Health.
Does Darla R. Oak accept Medicare?
Yes. CMS data shows Darla Oak billed Medicare for 1,083 services in 2024.
How many Medicare patients does Darla R. Oak see?
CMS counts 205 Medicare patients who saw Darla Oak in 2024, with an average age of 88.
What services does Darla R. Oak bill to Medicare?
In 2024, Darla Oak's most billed Medicare services were office visit, established patient (99211), nursing facility care (99309) and nursing facility care (99307).
What drugs does Darla R. Oak prescribe most?
In 2024 Medicare Part D data, Darla Oak's most prescribed drugs by claims were Gabapentin, Levothyroxine Sodium and Furosemide.
How long has Darla R. Oak been practicing?
Darla Oak graduated from medical school in 2006, 20 years ago.
Selling to nurse practitioner practices?
See nurse practitioners in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card