Samantha Callan, PA-C
NPI 1922535350 · Physician Assistant · Stanford, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Samantha Callan, PA-C is a Physician Assistant provider in Stanford, CA (NPI 1922535350).
Provider details
- NPI number
- 1922535350
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- 54686 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
285 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 159 | $139 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 49 | $184 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 43 | $94 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 34 | $129 |
Typical Medicare-allowed amounts for these services range $94–$184 (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 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Acyclovir | 102 | 30 |
| Prednisone | 44 | 15 |
| Ibrutinibbrand: Imbruvica | 39 | — |
| Ondansetron Hcl | 32 | 20 |
| Zanubrutinibbrand: Brukinsa | 28 | — |
| Valacyclovir Hclbrand: Valacyclovir | 27 | — |
| Entecavir | 26 | — |
| Famotidine |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-05-16
- Last updated
- 2025-12-23
- Certified
- 2025-12-23
Frequently asked questions
- What is Samantha Callan's NPI number?
- Samantha Callan's National Provider Identifier (NPI) is 1922535350, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Samantha Callan's specialty?
- Samantha Callan is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Samantha Callan located?
- Samantha Callan's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Samantha Callan's phone number?
- The practice phone number listed in the NPPES registry for Samantha Callan is (650) 723-4000.
- Does Samantha Callan accept Medicare?
- Samantha Callan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Samantha Callan's NPI active?
- Yes — Samantha Callan's NPI (1922535350) is active in the NPPES registry as of the last update on 2025-12-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.