Jennifer Knox Barleben, M.D.
NPI 1386896264 · Internal Medicine Physician · Newport Beach, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Knox Barleben, M.D. is a Internal Medicine Physician provider in Newport Beach, CA (NPI 1386896264).
Provider details
- NPI number
- 1386896264
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A98912 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,330 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 375 | $9 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 228 | $16 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 215 | $140 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 202 | $139 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 152 | $98 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 84 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 177 | 50 |
| Atorvastatin Calcium | 136 | 38 |
| Levothyroxine Sodium | 136 | 35 |
| Zolpidem Tartrate | 126 | 30 |
| Losartan Potassium | 108 | 26 |
| Levothyroxine Sodiumbrand: Synthroid | 96 | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$834 across 36 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-10-22
- Last updated
- 2020-01-09
- Certified
- 2020-01-09
Frequently asked questions
- What is Jennifer Knox Barleben's NPI number?
- Jennifer Knox Barleben's National Provider Identifier (NPI) is 1386896264, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Knox Barleben's specialty?
- Jennifer Knox Barleben is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer Knox Barleben located?
- Jennifer Knox Barleben's practice location on file with NPPES is 361 Hospital Rd Ste 322, Newport Beach, CA 92663-3524.
- What is Jennifer Knox Barleben's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Knox Barleben is (949) 574-0777.
- Does Jennifer Knox Barleben accept Medicare?
- Jennifer Knox Barleben is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Knox Barleben's NPI active?
- Yes — Jennifer Knox Barleben's NPI (1386896264) is active in the NPPES registry as of the last update on 2020-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.