Alexander Mark Papanastassiou, M.D.
Neurological Surgery Physician · San Antonio, TX
Alexander Mark Papanastassiou, M.D. is a neurological surgery physician with a practice address in San Antonio, Texas, and NPI 1659321230, issued on May 12, 2006. Check the license (Texas N6559, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Alexander Mark Papanastassiou
- Credential
- M.D.
- Primary taxonomy
- Neurological Surgery Physician 207T00000X
- License numbers
- N6559 TX
227755 MA
Self-reported in NPPES; status is on the state search - Practice location
- 7940 Floyd Curl Dr, San Antonio, TX 78229
- Phone
- (210) 567-6027
- Enumerated
- May 12, 2006
- Record last updated
- Feb 27, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (210) 567-3614
- Medicaid ID
- 216556501 TX
- Medicare enrollment
- Enrolled (PECOS I20100928000741); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest neurological surgery physician records → All 669 in Texas → Look up another NPI →
Also registered at 7940 Floyd Curl Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alexander Mark Papanastassiou in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license N6559Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average neurological surgery physician in 2024
30 Medicare Part D claims for 25 beneficiaries, against an average of 172 among the 4,378 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 17 claims were for opioids.
Most prescribed
- Acetaminophen-Codeine12 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: $2,438.40
17 payments; by number, the most common kind was food and beverage; the largest payer was InSightec,Inc. The 5,377 providers of this specialty with any payment received $14,925.58 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
- University OF Texas Health Science Center AT San AntonioSan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander Mark Papanastassiou among 669 neurological surgery physician records in Texas
Alexander Mark Papanastassiou, M.D. is one of 669 neurological surgery physician records with a practice address in Texas. 80% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 57% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2002 · median 2004 among the 451 with a school on file
- Record last updated2015 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207T00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurological Surgery Physician providers in Texas
There are 669 neurological surgery physician records in Texas.
All 669 in Texas → Every provider in San Antonio → Neurological Surgery Physician nationwide →
The 8 neurological surgery physician records with the nearest ZIP codes
- Roberto Aranibar, MDSan Antonio, TX 782291629079298
- Donald Atkins, MDSan Antonio, TX 782291245231729
- Christopher Bogaev, MDSan Antonio, TX 782291538160106
- Frank Fichtel, MDSan Antonio, TX 782291942201470
- Donald Hilton, MDSan Antonio, TX 782291760483291
- Thomas Kingman, M.D.San Antonio, TX 782291417981804
- Hatem Megahed, M.D.San Antonio, TX 782291154374502
- Warren Neely, M.D.San Antonio, TX 782291316977457
Common questions
What is Alexander Mark Papanastassiou, M.D.'s NPI number?
Alexander Mark Papanastassiou, M.D.'s National Provider Identifier (NPI) is 1659321230, issued on May 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alexander Mark Papanastassiou, M.D. located?
The NPPES record lists a practice address at 7940 Floyd Curl Dr, San Antonio, TX, 78229. Phone: (210) 567-6027. Providers update this record themselves, so call before visiting.
How can I verify Alexander Mark Papanastassiou, M.D.'s license?
NPPES lists Texas license number N6559, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alexander Mark Papanastassiou, M.D. prescribe under Medicare Part D?
In 2024, Alexander Mark Papanastassiou, M.D. had 30 Medicare Part D claims for 25 beneficiaries; the average among neurological surgery physician prescribers was 172. 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.