Carol Stewart-Hayostek, MD
NPI 1508880618 · Family Medicine Physician · Bakersfield, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carol Stewart-Hayostek, MD is a Family Medicine Physician provider in Bakersfield, CA (NPI 1508880618).
Provider details
- NPI number
- 1508880618
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G85518 (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
19 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
25 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) |
|---|---|---|
| Hemoglobin A1c Level83036 | 25 | $10 |
Typical Medicare-allowed amounts for these services range $10–$10 (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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metformin Hcl | 41 | 16 |
| Lisinopril | 27 | 11 |
| Atorvastatin Calcium | 27 | 13 |
| Losartan Potassium | 25 | 11 |
| Gabapentin | 19 | — |
| Amlodipine Besylate | 17 | — |
| Tamsulosin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$44 across 2 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
- 2006-07-26
- Last updated
- 2022-12-30
- Certified
- 2022-12-30
Frequently asked questions
- What is Carol Stewart-Hayostek's NPI number?
- Carol Stewart-Hayostek's National Provider Identifier (NPI) is 1508880618, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carol Stewart-Hayostek's specialty?
- Carol Stewart-Hayostek is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Carol Stewart-Hayostek located?
- Carol Stewart-Hayostek's practice location on file with NPPES is 7800 Niles St, Bakersfield, CA 93306.
- What is Carol Stewart-Hayostek's phone number?
- The practice phone number listed in the NPPES registry for Carol Stewart-Hayostek is (661) 328-4284.
- Does Carol Stewart-Hayostek accept Medicare?
- Carol Stewart-Hayostek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carol Stewart-Hayostek's NPI active?
- Yes — Carol Stewart-Hayostek's NPI (1508880618) is active in the NPPES registry as of the last update on 2022-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.