Juliann Castillo, PH.D, PA-C
NPI 1396103909 · Physician Assistant · Mcallen, TX
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Juliann Castillo, PH.D, PA-C is a Physician Assistant provider in Mcallen, TX (NPI 1396103909).
Provider details
- NPI number
- 1396103909
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PH.D, PA-C
- Sex
- Female
- Sole proprietor
- Yes
- License
- PA03496 (TX)
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
10 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
39 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 | 23 | $103 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 16 | $65 |
Typical Medicare-allowed amounts for these services range $65–$103 (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 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 65 | 30 |
| Clonazepam | 63 | 32 |
| Mirtazapine | 61 | 21 |
| Zolpidem Tartrate | 53 | 21 |
| Lorazepam | 47 | 18 |
| Alprazolam | 44 | 18 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$800 across 23 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
- 2016-02-10
- Last updated
- 2024-03-20
- Certified
- 2024-03-20
Frequently asked questions
- What is Juliann Castillo's NPI number?
- Juliann Castillo's National Provider Identifier (NPI) is 1396103909, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Juliann Castillo's specialty?
- Juliann Castillo is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Juliann Castillo located?
- Juliann Castillo's practice location on file with NPPES is 3600 N 23rd St Ste 103, Mcallen, TX 78501-6081.
- What is Juliann Castillo's phone number?
- The practice phone number listed in the NPPES registry for Juliann Castillo is (956) 682-4401.
- Does Juliann Castillo accept Medicare?
- Juliann Castillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Juliann Castillo's NPI active?
- Yes — Juliann Castillo's NPI (1396103909) is active in the NPPES registry as of the last update on 2024-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.