Thomas Andrew Hryniewicki, M.D.
Internal Medicine Physician · Orange, CA
Thomas Andrew Hryniewicki, M.D. is an internal medicine physician with a practice address in Orange, California, and NPI 1992807341, issued on Sep 5, 2006. Check the license (California G50543, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Andrew Hryniewicki
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G50543 CA
Self-reported in NPPES; status is on the state search - Practice location
- 845 E Chapman Ave, Orange, CA 92866
- Phone
- (714) 997-2899
- Enumerated
- Sep 5, 2006
- Record last updated
- Nov 20, 2025
- Fax
- (714) 289-7062
- Medicare enrollment
- Enrolled (PECOS I20101214000001); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 1987
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 845 E Chapman Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Annette Bernhut, D.O.Family Medicine Physician1841367471
- Ana Fajardo, M.D.Family Medicine Physician1154498798
- Kristi Hare, FNP-BCFamily Nurse Practitioner1679871172
- Hal Shimazu, MDFamily Medicine Physician1073682241
- Anne Stahl-Hughitt, NPNurse Practitioner1629126560
- Christina Yarwood, P.A.Medical Physician Assistant1174684666
Verify Thomas Andrew Hryniewicki in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G50543Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.4 times the Medicare Part D claims of the average internal medicine physician in 2024
10,775 Medicare Part D claims for 962 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. 92 claims were for opioids.
Most prescribed
- Atorvastatin Calcium880 claims
- Levothyroxine Sodium604 claims
- Lisinopril555 claims
- Amlodipine Besylate375 claims
- Losartan Potassium341 claims
- Hydrochlorothiazide283 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: $295.81
14 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Centers For Family Medicine GPLos Alamitos, CA
- Healthcare Partners Affiliates Medical GroupOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
187 internal medicine physician records list a practice address in Orange
They are 187 of the 13,245 NPPES records with a practice address in Orange, and 17,696 internal medicine physician records in California.
All 187 in Orange → All 17,696 in California → Every provider in Orange →
Other internal medicine physician records in California
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- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Thomas Andrew Hryniewicki, M.D.'s NPI number?
Thomas Andrew Hryniewicki, M.D.'s National Provider Identifier (NPI) is 1992807341, issued on Sep 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Andrew Hryniewicki, M.D. located?
The NPPES record lists a practice address at 845 E Chapman Ave, Orange, CA, 92866. Phone: (714) 997-2899. Providers update this record themselves, so call before visiting.
How can I verify Thomas Andrew Hryniewicki, M.D.'s license?
NPPES lists California license number G50543, 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 Thomas Andrew Hryniewicki, M.D. prescribe under Medicare Part D?
In 2024, Thomas Andrew Hryniewicki, M.D. had 10,775 Medicare Part D claims for 962 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.