Alexander Antonios Theologis, M.D.
Orthopedic Surgery · San Francisco, CA
At a glance
500 Parnassus Ave, San Francisco, CA 94143
Published activity: Laminectomy or laminotomy (partial removal of spine bones) · Spinal fusion. View counts and coverage
NPPES record updated Mar 4, 2019. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
500 Parnassus Ave Mu320San Francisco, CA 94143
Additional reported practice locations
500 Parnassus AveMu320
San Francisco, CA 94143
Phone: 4153538203
Education & affiliations
- Medical / professional school
- University Of California, San Francisco School Of Medicine
- Graduation year
- 2011
- CMS specialties
- Orthopedic Surgery
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
Reported hospital affiliations
- Adventist Health Sonora Sonora, CA
- John Muir Medical Center - Walnut Creek Campus Walnut Creek, CA
- Ucsf Medical Center San Francisco, CA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Laminectomy or laminotomy (partial removal of spine bones) | 102 |
| Spinal fusion | 611 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Royalty or license | $149,898.88 |
| Consulting fee | $75,224.91 |
| Travel and lodging | $8,228.10 |
| Food and beverage | $2,937.41 |
Reporting companies
| Company | Amount |
|---|---|
| ALPHATEC SPINE, INC | $104,122.94 |
| ULRICH MEDICAL USA, INC. | $70,335.28 |
| VB SPINE LLC | $21,007.35 |
| DEPUY SYNTHES PRODUCTS, INC. | $16,223.39 |
| MEDICAL DEVICE BUSINESS SERVICES, INC. | $11,910.86 |
| SI-BONE, INC. | $4,606.27 |
| STRYKER CORPORATION | $3,043.37 |
| GLOBUS MEDICAL, INC. | $1,506.61 |
| Other reporting companies | $3,533.23 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Orthopedic Surgery
- Taxonomy code
- 207X00000X
- Enumeration date
- Jun 16, 2011
- Record updated
- Mar 4, 2019
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
207XS0117X
License reported: 2017010211 MO
207X00000X · Primary
License reported: A124464 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
500 Parnassus AveMu320
San Francisco, CA 94143
- Phone
- (415) 353-8203
Mailing address
660 S EUCLID AVESAINT LOUIS, MO 631101010
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
Report a directory issue