Darla Oak
NPI 1891868337 · Nurse Practitioner · Reseda, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Darla Oak is a Nurse Practitioner provider in Reseda, CA (NPI 1891868337).
Provider details
- NPI number
- 1891868337
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 582844 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,083 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 | 554 | $23 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 487 | $101 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, at Least 10 Minutes99307 | 42 | $38 |
Typical Medicare-allowed amounts for these services range $23–$101 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 150 | 21 |
| Levothyroxine Sodium | 89 | 14 |
| Furosemide | 46 | 16 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 37 | — |
| Apixabanbrand: Eliquis | 34 | — |
| Cephalexin | 28 | 22 |
| Mirabegronbrand: Myrbetriq | 28 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-15
- Last updated
- 2009-06-04
Frequently asked questions
- What is Darla Oak's NPI number?
- Darla Oak's National Provider Identifier (NPI) is 1891868337, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Darla Oak's specialty?
- Darla Oak is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Darla Oak located?
- Darla Oak's practice location on file with NPPES is 7150 Tampa Ave, Reseda, CA 91335-3700.
- What is Darla Oak's phone number?
- The practice phone number listed in the NPPES registry for Darla Oak is (818) 774-3354.
- Does Darla Oak accept Medicare?
- Darla Oak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Darla Oak's NPI active?
- Yes — Darla Oak's NPI (1891868337) is active in the NPPES registry as of the last update on 2009-06-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.