Stela Georgieva Kostova-Abadjieva, MD
Internal Medicine Physician · Tustin, CA
Stela Georgieva Kostova-Abadjieva, MD is an internal medicine physician with a practice address in Tustin, California, and NPI 1164791265, issued on Dec 19, 2011. Check the license (California A121900, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stela Georgieva Kostova-Abadjieva
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A121900 CA
Self-reported in NPPES; status is on the state search - Practice location
- 661 W 1St St Ste G, Tustin, CA 92780
- Phone
- (714) 665-9890
- Enumerated
- Dec 19, 2011
- Record last updated
- Jan 10, 2023
- Fax
- (714) 665-9891
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 661 W 1St St Ste G
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stela Georgieva Kostova-Abadjieva in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A121900Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
119 Medicare Part D claims for 21 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Buprenorphine-Naloxone86 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: $50.71
2 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. 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.
Stela Georgieva Kostova-Abadjieva among 17,696 internal medicine physician records in California
Stela Georgieva Kostova-Abadjieva, 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 2011, is newer than 66% of them.
- NPI issued2011 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2023 · 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).
34 internal medicine physician records list a practice address in Tustin
They are 34 of the 2,221 NPPES records with a practice address in Tustin, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Tustin → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mohamed Al-Sadek, M.D.Tustin, CA 927801154353829
- Susan Ban, M.D.Tustin, CA 927801053324970
- Bernard Bennett, MDTustin, CA 927801871568899
- Jacqueline Do, M.D.Tustin, CA 927801689646952
- Huong Duong, M.D.Tustin, CA 927801013020437
- Daniel Eichinger, DOTustin, CA 927801598724015
- Pin-Hung Hsieh, M.D.Tustin, CA 927801144323064
- Thomas Hwang, M.D.Tustin, CA 927801124039722
Common questions
What is Stela Georgieva Kostova-Abadjieva, MD's NPI number?
Stela Georgieva Kostova-Abadjieva, MD's National Provider Identifier (NPI) is 1164791265, issued on Dec 19, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Stela Georgieva Kostova-Abadjieva, MD located?
The NPPES record lists a practice address at 661 W 1St St Ste G, Tustin, CA, 92780. Phone: (714) 665-9890. Providers update this record themselves, so call before visiting.
How can I verify Stela Georgieva Kostova-Abadjieva, MD's license?
NPPES lists California license number A121900, 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 Stela Georgieva Kostova-Abadjieva, MD prescribe under Medicare Part D?
In 2024, Stela Georgieva Kostova-Abadjieva, MD had 119 Medicare Part D claims for 21 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.