Janne Huynh Dewing, M.D.
Internal Medicine Physician · Laguna Beach, CA
Janne Huynh Dewing, M.D. is an internal medicine physician with a practice address in Laguna Beach, California, and NPI 1699973297, issued on Jul 5, 2007. Check the license (California C52349, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Janne Huynh Dewing
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- C52349 CA
208683 NY
Self-reported in NPPES; status is on the state search - Practice location
- 31862 Coast Hwy Ste 200, Laguna Beach, CA 92651
- Phone
- (949) 340-5454
- Enumerated
- Jul 5, 2007
- Record last updated
- Jan 5, 2024
- Fax
- (949) 340-5454
- Medicaid ID
- 01889005 NY
- Medicare enrollment
- Enrolled (PECOS I20090430000542); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1994
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Janne Huynh Dewing in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C52349Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average internal medicine physician in 2024
6,784 Medicare Part D claims for 488 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 46 claims were for opioids.
Most prescribed
- Atorvastatin Calcium456 claims
- Levothyroxine Sodium364 claims
- Amlodipine Besylate321 claims
- Lisinopril267 claims
- Trazodone Hcl235 claims
- Losartan Potassium172 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.
The MIPS final score for 2023 (Medicare payment program): 6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Janne Huynh Dewing among 17,696 internal medicine physician records in California
Janne Huynh Dewing, 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1994 · 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).
12 internal medicine physician records list a practice address in Laguna Beach
They are 12 of the 505 NPPES records with a practice address in Laguna Beach, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Laguna Beach → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nancy Boerner, M.D.Laguna Beach, CA 926511154416451
- Russell Brower, M.D.Laguna Beach, CA 926511104482785
- Kathryn CardozaLaguna Beach, CA 926511518427749
- Jeffrey Crudo, M.D.Laguna Beach, CA 926511508987371
- Cherie Hinchliffe, MDLaguna Beach, CA 926511619071867
- David Kim, MDLaguna Beach, CA 926511861541633
- Chau Ngo, M.D.Laguna Beach, CA 926511477613339
- Rick Pesano, M.D.Laguna Beach, CA 926511770561060
Common questions
What is Janne Huynh Dewing, M.D.'s NPI number?
Janne Huynh Dewing, M.D.'s National Provider Identifier (NPI) is 1699973297, issued on Jul 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Janne Huynh Dewing, M.D. located?
The NPPES record lists a practice address at 31862 Coast Hwy Ste 200, Laguna Beach, CA, 92651. Phone: (949) 340-5454. Providers update this record themselves, so call before visiting.
How can I verify Janne Huynh Dewing, M.D.'s license?
NPPES lists California license number C52349, 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 Janne Huynh Dewing, M.D. prescribe under Medicare Part D?
In 2024, Janne Huynh Dewing, M.D. had 6,784 Medicare Part D claims for 488 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Janne Huynh Dewing, M.D.'s MIPS final score?
The 2023 MIPS final score is 6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.