Cherlyn Alferos, FNP
NPI 1568155430 · Family Nurse Practitioner · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cherlyn Alferos, FNP is a Family Nurse Practitioner provider in Walnut Creek, CA (NPI 1568155430).
Provider details
- NPI number
- 1568155430
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 95023557 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
3 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
1,277 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 | 525 | $93 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 148 | $69 |
| X-Ray of Knee, 3 Views73562 | 118 | $46 |
| X-Ray of Lower and Sacral Spine, 2-3 Views72100 | 74 | $45 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 73 | $113 |
| X-Ray of Hip, 2-3 Views73502 | 67 | $54 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Diclofenac Sodium | 165 | 143 |
| Cyclobenzaprine Hcl | 85 | 83 |
| Prednisone | 62 | 61 |
| Methylprednisolone | 56 | 55 |
| Celecoxib | 33 | 26 |
| Tramadol Hcl | 19 | 18 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$16 across 1 record (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
- 2023-05-29
- Last updated
- 2023-11-02
- Certified
- 2023-11-02
Frequently asked questions
- What is Cherlyn Alferos's NPI number?
- Cherlyn Alferos's National Provider Identifier (NPI) is 1568155430, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cherlyn Alferos's specialty?
- Cherlyn Alferos is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Cherlyn Alferos located?
- Cherlyn Alferos's practice location on file with NPPES is 2405 Shadelands Dr Ste 300, Walnut Creek, CA 94598-5906.
- What is Cherlyn Alferos's phone number?
- The practice phone number listed in the NPPES registry for Cherlyn Alferos is (925) 939-8585.
- Does Cherlyn Alferos accept Medicare?
- Cherlyn Alferos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cherlyn Alferos's NPI active?
- Yes — Cherlyn Alferos's NPI (1568155430) is active in the NPPES registry as of the last update on 2023-11-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.