Joanna Margaret Libby, MD
Internal Medicine Physician · Newport Beach, CA
Joanna Margaret Libby, MD is an internal medicine physician with a practice address in Newport Beach, California, and NPI 1891283362, issued on Apr 30, 2018. Check the license (California A165434, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joanna Margaret Libby
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A165434 CA
Self-reported in NPPES; status is on the state search - Practice location
- 360 San Miguel Dr Ste 300, Newport Beach, CA 92660
- Phone
- (949) 557-0830
- Enumerated
- Apr 30, 2018
- Record last updated
- Sep 23, 2024
- Fax
- (949) 557-0831
- Medicare enrollment
- Enrolled (PECOS I20210811003308); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 360 San Miguel Dr Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joanna Margaret Libby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A165434Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% more Medicare Part D claims than the average internal medicine physician in 2024
4,324 Medicare Part D claims for 557 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 62 claims were for opioids.
Most prescribed
- Atorvastatin Calcium381 claims
- Amlodipine Besylate322 claims
- Levothyroxine Sodium212 claims
- Rosuvastatin Calcium159 claims
- Lisinopril131 claims
- Losartan Potassium124 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.
Bills Medicare through one group practice
- Hoag ClinicHuntington Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joanna Margaret Libby among 17,696 internal medicine physician records in California
Joanna Margaret Libby, MD 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 2018, is newer than 84% of them.
- NPI issued2018 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2018 · median 2004 among the 11,065 with a school on file
- Record last updated2024 · 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
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- Gilbert Goodman, M.D.Newport Beach, CA 926601851357867
- Richard Harano, M.DNewport Beach, CA 926601235185695
- Bradley Kays, M.D.Newport Beach, CA 926601417914334
Common questions
What is Joanna Margaret Libby, MD's NPI number?
Joanna Margaret Libby, MD's National Provider Identifier (NPI) is 1891283362, issued on Apr 30, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Joanna Margaret Libby, MD located?
The NPPES record lists a practice address at 360 San Miguel Dr Ste 300, Newport Beach, CA, 92660. Phone: (949) 557-0830. Providers update this record themselves, so call before visiting.
How can I verify Joanna Margaret Libby, MD's license?
NPPES lists California license number A165434, 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 Joanna Margaret Libby, MD prescribe under Medicare Part D?
In 2024, Joanna Margaret Libby, MD had 4,324 Medicare Part D claims for 557 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.
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.