John H. Stasiewicz, MD
Family Medicine Physician · Irvine, CA
John H. Stasiewicz, MD is a family medicine physician with a practice address in Irvine, California, and NPI 1033100482, issued on Nov 3, 2005. Check the license (California G21256, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John H. Stasiewicz
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G21256 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4050 Barranca Pkwy, Irvine, CA 92604
- Phone
- (949) 551-1090
- Enumerated
- Nov 3, 2005
- Record last updated
- Oct 13, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (949) 262-5500
- Medicaid ID
- 00G212560 CA
- Medicare enrollment
- Enrolled (PECOS I20100222000294); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1970
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 4050 Barranca Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Barton Billeci, MDAdolescent Medicine (Internal Medicine) Physician1154407237
- Jon Biorkman, MDFamily Medicine Physician1023008679
- Betty Chen, D.D.S., M.S.Orthodontics and Dentofacial Orthopedics Dentistry1902173362
Verify John H. Stasiewicz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G21256Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% more Medicare Part D claims than the average family medicine physician in 2024
5,153 Medicare Part D claims for 489 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 154 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium336 claims
- Levothyroxine Sodium189 claims
- Metformin Hcl177 claims
- Atorvastatin Calcium170 claims
- Lisinopril168 claims
- Simvastatin153 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: $1,878.96
82 payments; by number, the most common kind was food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- Memorialcare Medical FoundationIrvine, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John H. Stasiewicz among 17,133 family medicine physician records in California
John H. Stasiewicz, MD is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1970 · median 2005 among the 10,652 with a school on file
- Record last updated2015 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
148 family medicine physician records list a practice address in Irvine
They are 148 of the 7,778 NPPES records with a practice address in Irvine, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Irvine → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jon Biorkman, MDIrvine, CA 926041023008679
- David Bunten, D.O.Irvine, CA 926041679527857
- Jun Ho Chae, M.D.Irvine, CA 926041003811969
- James Fenlon, M.DIrvine, CA 926041851347256
- Howard Fishbein, M.D.Irvine, CA 926041689629487
- Richard Kim, DOIrvine, CA 926041710978770
- Steven Long, MDIrvine, CA 926041760446470
- Mary McCarthy, MDIrvine, CA 926041508820267
Common questions
What is John H. Stasiewicz, MD's NPI number?
John H. Stasiewicz, MD's National Provider Identifier (NPI) is 1033100482, issued on Nov 3, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John H. Stasiewicz, MD located?
The NPPES record lists a practice address at 4050 Barranca Pkwy, Irvine, CA, 92604. Phone: (949) 551-1090. Providers update this record themselves, so call before visiting.
How can I verify John H. Stasiewicz, MD's license?
NPPES lists California license number G21256, 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 H. Stasiewicz, MD prescribe under Medicare Part D?
In 2024, John H. Stasiewicz, MD had 5,153 Medicare Part D claims for 489 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.