John Stephen Wikle, M.D.
Internal Medicine Physician · Irvine, CA
John Stephen Wikle, M.D. is an internal medicine physician with a practice address in Irvine, California, and NPI 1831138080, issued on Jun 5, 2006. Check the license (California G77860, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Stephen Wikle
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G77860 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4950 Barranca Pkwy, Irvine, CA 92604
- Phone
- (949) 262-9700
- Enumerated
- Jun 5, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (949) 262-0700
- Medicare enrollment
- Enrolled (PECOS I20040227000534); accepts Medicare assignment
- Medical or professional school
- Wake Forest University School Of Medicine, 1992
- 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 4950 Barranca Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Stephen Wikle in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G77860Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average internal medicine physician in 2024
6,837 Medicare Part D claims for 480 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. 109 claims were for opioids.
Most prescribed
- Atorvastatin Calcium600 claims
- Losartan Potassium297 claims
- Rosuvastatin Calcium247 claims
- Levothyroxine Sodium240 claims
- Amlodipine Besylate230 claims
- Tamsulosin Hcl183 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.
John Stephen Wikle among 17,696 internal medicine physician records in California
John Stephen Wikle, 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1992 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 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).
155 internal medicine physician records list a practice address in Irvine
They are 155 of the 7,778 NPPES records with a practice address in Irvine, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Irvine → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Adeela Ahsan, MDIrvine, CA 926041932103595
- Farrokh Alemzadeh, MDIrvine, CA 926041528094828
- Linda Alimadadian, DOIrvine, CA 926041891711065
- Chienwei Chen, MDIrvine, CA 926041992795256
- Mahdieh Fallahtafti, D.O.Irvine, CA 926041700802998
- Kalena Hwang, M.D.Irvine, CA 926041225088164
- Keith Lee, MDIrvine, CA 926041699766188
- Grace Lozinski, M.D.Irvine, CA 926041659399582
Common questions
What is John Stephen Wikle, M.D.'s NPI number?
John Stephen Wikle, M.D.'s National Provider Identifier (NPI) is 1831138080, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Stephen Wikle, M.D. located?
The NPPES record lists a practice address at 4950 Barranca Pkwy, Irvine, CA, 92604. Phone: (949) 262-9700. Providers update this record themselves, so call before visiting.
How can I verify John Stephen Wikle, M.D.'s license?
NPPES lists California license number G77860, 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 John Stephen Wikle, M.D. prescribe under Medicare Part D?
In 2024, John Stephen Wikle, M.D. had 6,837 Medicare Part D claims for 480 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.