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Dr. Aaron Tabieros Semana , DNP, NP

Nurse Practitioner β€’ Stanford, CA

Active NPI 1104459486 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

300 Pasteur Dr
Stanford, CA 943052200

Call 6257234000 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

300 Pasteur Dr

Stanford, CA 943052200

Telephone 6257234000
Organization at the Same NPPES Address or Phone
Stanford Hospital And Clinic Facility NPI 1285683292

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

NPPES lists 2 distinct additional practice-address records in San Ramon, CA; Walnut Creek, CA. See the list

Source: CMS NPPES NPI Registry, practice location records; release date unavailable.

CMS Doctors and Clinicians lists 2 distinct group names: Golden State Medical Center Pc; Permanente Medical Group Inc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026

Graduation Year

2019

30-day fills

490 standardized 30-day fills in 2023

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$12,647 in 2023

The total cost of these prescriptions in 2023, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023.

Industry payments (Open Payments)

Fewer than 11 payment records totaling $24.31 in 2024

Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.

These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.

General: payments not tied to research, such as meals, travel, consulting or speaking fees.

A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.

Source: CMS Open Payments, program year 2024.

Guide: How to read an Open Payments record

Years since graduation

7 years (graduated 2019)

CMS Doctors and Clinicians data list 2019 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.

NPI first issued

2020

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, β€œDoes your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Semana has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Semana as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Stanford and California

Billing and prescribing volume is not a quality rating.

Medicare Part D

Comparisons use 2024 data. The latest CMS data for Dr. Semana are from 2023.

588 active clinicians are listed under Nurse Practitioner with a practice address in Stanford, CA (8,363 in California).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Stanford

45.6% of these 588 clinicians have the CMS telehealth indicator.

72.6% of these 588 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Part D Prescribers (2023), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo Β· Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments Β· Program Year 2024
Disclosure Year:

Program year 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $24.31.

Manufacturer Payment Nature Product Type Amount ($)
ABBVIE INC.
Food and Beverage
In-kind items and services
UBRELVY General $24.31

Source: CMS Open Payments, program year 2024, released June 30, 2026.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2023.

CMS Part D Β· Data Year 2023
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen 144 4,114 $2,815.60 43
Gabapentin Gabapentin 45 1,398 $989.46 14
Cyclobenzaprine Hcl Cyclobenzaprine Hcl 44 1,320 $473.70 13
Diclofenac Sodium Diclofenac Sodium 43 1,095 $1,204.36 14
Tizanidine Hcl Tizanidine Hcl 31 930 $247.46 β€”
Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen 26 714 $370.62 β€”
Pregabalin Pregabalin 25 870 $1,327.53 β€”
Zolpidem Tartrate Zolpidem Tartrate 21 690 $94.24 β€”
Oxycodone Hcl Oxycodone Hcl 19 545 $345.44 β€”
Lidocaine Lidocaine 18 660 $2,414.64 β€”
Naloxone Hcl Naloxone Hcl 14 178 $1,176.62 14
Ibuprofen Ibuprofen 12 385 $135.80 β€”
Tramadol Hcl Tramadol Hcl 11 289 $99.58 β€”
Morphine Sulfate Er Morphine Sulfate 11 330 $370.82 β€”
Celecoxib Celecoxib 11 330 $581.34 β€”

Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2026-10-12
Nurse Practitioner Primary Specialty

NUCC Taxonomy Code: 363L00000X

License # reported to NPPES CA 95013980

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Nurse Practitioner - Acute Care

NUCC Taxonomy Code: 363LA2100X

License # reported to NPPES CA 95013980
Nurse Practitioner - Family

NUCC Taxonomy Code: 363LF0000X

License # reported to NPPES CA 95013980
Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Medical Board of California.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - NURSE PRACTITIONER

Medicare Enrollment ID

I20250701002465

Enrollment State Jurisdiction

CA

PECOS Control ID

3375056583

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026

Golden State Medical Center Pc

2551 San Ramon Valley Blvd, San Ramon, CA 945831661

Phone: 9258384462

Permanente Medical Group Inc

275 Hospital Pkwy, San Jose, CA 951191106

Phone: 4089723000

Secondary Practice Locations

450 N Wiget Ln

Walnut Creek, CA 945982408

Phone: 9256919806

2551 San Ramon Valley Blvd Ste 108

San Ramon, CA 945831661

Phone: 2489709083

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

1 listed
Dr. Soobin Kim , MD

Anesthesiology

NPI 1376284885

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

15 Historical Events
πŸ“
Updated Practice Location October 12, 2026

Registered at 300 PASTEUR DR, STANFORD, CA 943052200 (Tel: 6257234000)

πŸ“
Updated Business Mailing Address October 12, 2026

Registered at 300 PASTEUR DR, STANFORD, CA 943052200 (Tel: 6257234000)

🏒
Secondary Practice Location Registered October 12, 2026

Additional practice office at 2551 San Ramon Valley Blvd Ste 108, San Ramon, CA 945831661

πŸ‘€
Provider Name / Credentials Updated October 12, 2026

Recorded as AARON SEMANA, DNP, NP

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) October 12, 2026

Nurse Practitioner (license number reported to NPPES: CA 95013980)

πŸ“
Updated Practice Location September 22, 2023

Registered at 2551 SAN RAMON VALLEY BLVD STE 108, SAN RAMON, CA 945831661 (Tel: 2489709083)

πŸ“
Updated Business Mailing Address September 22, 2023

Registered at 8545 ZANDOL CT, DUBLIN, CA 945681007 (Tel: 6614063429)

🏒
Secondary Practice Location Registered September 22, 2023

Additional practice office at 450 N Wiget Ln, Walnut Creek, CA 945982408

πŸ“
Updated Practice Location December 03, 2021

Registered at 450 N WIGET LN, WALNUT CREEK, CA 945982408 (Tel: 9256919806)

βœ…
NPI Profile Active February 15, 2020

NPI status registered as active in NPPES database

πŸ“
Practice Location (Initial Record) February 15, 2020

Registered at 39400 PASEO PADRE PKWY, FREMONT, CA 945382310 (Tel: 5102483000)

πŸ“
Business Mailing Address (Initial Record) February 15, 2020

Registered at PO BOX 1501, LANCASTER, CA 935391501 (Tel: 6614063429)

πŸ‘€
Provider Name / Credentials (Initial Record) February 15, 2020

Recorded as AARON SEMANA, FNP/DNP

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) February 15, 2020

Nurse Practitioner (license number reported to NPPES: CA 95013980)

🟒
Initial NPI Registration & Enumeration February 15, 2020

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1104459486
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: February 15, 2020
Last Update: October 12, 2026
Sole Proprietor: No

Other Nurse Practitioners in Stanford

All Nurse Practitioners in Stanford

Mailing Address

300 Pasteur Dr

Stanford, CA 943052200

Phone: 6257234000

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.