Mary Theoktisto
NPI 1619358934 · Infectious Disease Physician · Lakeway, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Theoktisto is a Infectious Disease Physician provider in Lakeway, TX (NPI 1619358934).
Provider details
- NPI number
- 1619358934
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- S3323 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
539 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 141 | $124 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 104 | $167 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 100 | $77 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 100 | $115 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 38 | $9 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Doxycycline Hyclate | 46 | 17 |
| Amoxicillin | 42 | — |
| Rifampin | 38 | — |
| Cefazolin Sodium | 34 | — |
| Cephalexin | 34 | 18 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 34 | — |
| Cefepime Hcl | 31 | 14 |
| Vancomycin Hcl | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,119 across 44 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-06-11
- Last updated
- 2020-08-20
- Certified
- 2020-08-20
Frequently asked questions
- What is Mary Theoktisto's NPI number?
- Mary Theoktisto's National Provider Identifier (NPI) is 1619358934, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Theoktisto's specialty?
- Mary Theoktisto is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Theoktisto located?
- Mary Theoktisto's practice location on file with NPPES is 100 Medical Pkwy, Lakeway, TX 78738-5621.
- What is Mary Theoktisto's phone number?
- The practice phone number listed in the NPPES registry for Mary Theoktisto is (512) 571-5000.
- Does Mary Theoktisto accept Medicare?
- Mary Theoktisto is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Theoktisto's NPI active?
- Yes — Mary Theoktisto's NPI (1619358934) is active in the NPPES registry as of the last update on 2020-08-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.