NPPES file of Aug 9, 2026

Jennifer Lynn Knox Barleben, M.D.

Internal Medicine Physician · Newport Beach, CA

Jennifer Lynn Knox Barleben, M.D. is an internal medicine physician with a practice address in Newport Beach, California, and NPI 1386896264, issued on Oct 22, 2008. Check the license (California A98912, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1386896264
Name
Jennifer Lynn Knox Barleben
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
A98912 CA
Self-reported in NPPES; status is on the state search
Practice location
361 Hospital RD Ste 322, Newport Beach, CA 92663
Phone
(949) 574-0777
Enumerated
Oct 22, 2008
Record last updated
Jan 9, 2020 (not updated in 6 years: call before relying on the address or phone)
Fax
(949) 650-3505
Medicare enrollment
Enrolled (PECOS I20081223000549); accepts Medicare assignment
Medical or professional school
New York Medical College, 2004
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 361 Hospital RD Ste 322

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. David Brouwer, MDInternal Medicine Physician1629018544
  2. David Chun, MDInternal Medicine Physician1730152976

Verify Jennifer Lynn Knox Barleben in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A98912    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

13% more Medicare Part D claims than the average internal medicine physician in 2024

3,586 Medicare Part D claims for 295 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 48 claims were for opioids.

  1. Jennifer Knox Barleben3,586
  2. Specialty average3,176

Most prescribed

  1. Rosuvastatin Calcium177 claims
  2. Atorvastatin Calcium136 claims
  3. Levothyroxine Sodium136 claims
  4. Zolpidem Tartrate126 claims
  5. Losartan Potassium108 claims
  6. Synthroid96 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $833.58

36 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Jennifer Knox Barleben$833.58
  2. Specialty average$1,303.06

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Newport Beach Medical AssociatesNewport Beach, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Jennifer Lynn Knox Barleben among 17,696 internal medicine physician records in California

Jennifer Lynn Knox Barleben, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.

  • NPI issued2008 · 56% of these records are older, 40% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 63% of these records are
  • Graduated2004 · median 2004 among the 11,065 with a school on file
  • Record last updated2020 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

94 internal medicine physician records list a practice address in Newport Beach

They are 94 of the 4,414 NPPES records with a practice address in Newport Beach, and 17,696 internal medicine physician records in California.

All 17,696 in California → Every provider in Newport Beach → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. David Brouwer, MDNewport Beach, CA 926631629018544
  2. William Bruce, MDNewport Beach, CA 926631265490890
  3. Gary Carlson, MDNewport Beach, CA 926631497700116
  4. David Chun, MDNewport Beach, CA 926631730152976
  5. Dennis Jordanides, M.D.Newport Beach, CA 926631285638031
  6. Kambiz Karimi, MDNewport Beach, CA 926631720061823
  7. Gregory Katz, MDNewport Beach, CA 926631184674178
  8. Cameron Khavarian, M.D.Newport Beach, CA 926631104871938

Common questions

What is Jennifer Lynn Knox Barleben, M.D.'s NPI number?

Jennifer Lynn Knox Barleben, M.D.'s National Provider Identifier (NPI) is 1386896264, issued on Oct 22, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Jennifer Lynn Knox Barleben, M.D. located?

The NPPES record lists a practice address at 361 Hospital RD Ste 322, Newport Beach, CA, 92663. Phone: (949) 574-0777. Providers update this record themselves, so call before visiting.

How can I verify Jennifer Lynn Knox Barleben, M.D.'s license?

NPPES lists California license number A98912, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Jennifer Lynn Knox Barleben, M.D. prescribe under Medicare Part D?

In 2024, Jennifer Lynn Knox Barleben, M.D. had 3,586 Medicare Part D claims for 295 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.