Carla Stillwell, MD
NPI 1447540083 · Family Medicine Physician · National City, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carla Stillwell, MD is a Family Medicine Physician provider in National City, CA (NPI 1447540083).
Provider details
- NPI number
- 1447540083
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A114687 (CA)
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
15 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
155 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 136 | $98 |
| Administration of Influenza Virus VaccineG0008 | 19 | $35 |
Typical Medicare-allowed amounts for these services range $35–$98 (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 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 226 | 78 |
| Amlodipine Besylate | 192 | 59 |
| Losartan Potassium | 140 | 44 |
| Metformin Hcl | 139 | 42 |
| Levothyroxine Sodium | 127 | 35 |
| Lisinopril | 127 | 39 |
| Alendronate Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,060 across 41 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
- 2011-04-16
- Last updated
- 2024-05-17
- Certified
- 2024-05-17
Frequently asked questions
- What is Carla Stillwell's NPI number?
- Carla Stillwell's National Provider Identifier (NPI) is 1447540083, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carla Stillwell's specialty?
- Carla Stillwell is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Carla Stillwell located?
- Carla Stillwell's practice location on file with NPPES is 22 W 35th St Ste 101, National City, CA 91950-7926.
- What is Carla Stillwell's phone number?
- The practice phone number listed in the NPPES registry for Carla Stillwell is (619) 427-3361.
- Does Carla Stillwell accept Medicare?
- Carla Stillwell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carla Stillwell's NPI active?
- Yes — Carla Stillwell's NPI (1447540083) is active in the NPPES registry as of the last update on 2024-05-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.