Teresa Shields-Szabo, MD
NPI 1578677985 · Family Medicine Physician · Foothill Ranch, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Teresa Shields-Szabo, MD is a Family Medicine Physician provider in Foothill Ranch, CA (NPI 1578677985).
Provider details
- NPI number
- 1578677985
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 39601 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
71 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 49 | $127 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 22 | $179 |
Typical Medicare-allowed amounts for these services range $127–$179 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 172 | 56 |
| Atorvastatin Calcium | 132 | 53 |
| Rosuvastatin Calcium | 71 | 30 |
| Losartan Potassium | 67 | 30 |
| Lisinopril | 66 | 28 |
| Amlodipine Besylate | 62 | 26 |
| Simvastatin |
Practice location
Mailing address
Additional practice locations (1)
- 7761 Shaffer ParkwaySuite 225Littleton, CO 80127Phone: (303) 932-2988Fax: (303) 932-6625
Registry dates
- Enumerated
- 2006-08-19
- Last updated
- 2021-11-10
- Certified
- 2021-11-10
Frequently asked questions
- What is Teresa Shields-Szabo's NPI number?
- Teresa Shields-Szabo's National Provider Identifier (NPI) is 1578677985, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Teresa Shields-Szabo's specialty?
- Teresa Shields-Szabo is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Teresa Shields-Szabo located?
- Teresa Shields-Szabo's practice location on file with NPPES is 26795 Portola Pkwy, Foothill Ranch, CA 92610-1713.
- What is Teresa Shields-Szabo's phone number?
- The practice phone number listed in the NPPES registry for Teresa Shields-Szabo is (949) 829-9403.
- Does Teresa Shields-Szabo accept Medicare?
- Teresa Shields-Szabo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Teresa Shields-Szabo's NPI active?
- Yes — Teresa Shields-Szabo's NPI (1578677985) is active in the NPPES registry as of the last update on 2021-11-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.