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Active NPI 1598735359 Individual Practitioner Male Practitioner

Alan Vance Siewertsen , RD

Dietitian, Registered • Jacksonville, FL

Public Directory Information & Medical Disclaimer

This profile is compiled from official public domain records provided by CMS and the NPPES registry. TRUE-MEDINFO is an independent reference directory and does not provide medical advice, diagnosis, or treatment recommendations. Always consult a licensed medical professional for personal health decisions.

Professional Overview & Biography Verified Profile Summary

Alan Siewertsen, RD is a registered healthcare professional specializing in Dietitian, Registered in Jacksonville, FL. Official NPI practice address is registered at 2080 CHILD ST.

Practice Location & Contact Primary Location

Practice Address

2080 Child St

Jacksonville, FL 322145005

Telephone 9045429786
Fax 9045429117
Associated Practice Facility / Clinic
🏢 Naval Hospital Jacksonville Facility NPI 1265411383

Specialty Benchmarks & Practice Insights

Comparative analytics for Dietitian, Registered in Jacksonville, FL

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 10.6 Yrs
State Avg: 17.1 Yrs
Regional Practice Density
261 Specialists

Practicing in Jacksonville, FL (3492 Statewide)

Telehealth Adoption Rate
6.5% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

Dietitian, Registered Primary Specialty

NUCC Taxonomy Code: 133V00000X

A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

3 Associated Practitioners
Barbara Williams , MA, RD, LDN

Dietitian, Registered

NPI 1366477804

Master of Arts, Registered Dietitian, Licensed Dietitian Nutritionist

Melissa Amescua , RD, LD, N

Dietitian, Registered

NPI 1649414772

Registered Dietitian, Licensed Dietitian, N

Caitlin Stice , RDN

Dietitian, Registered

NPI 1770238768

Registered Dietitian Nutritionist

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 08, 2007

Registered at 2080 CHILD ST, JACKSONVILLE, FL 322145005 (Tel: 9045429786)

📍
Updated Business Mailing Address July 08, 2007

Registered at 650 TIMBERMILL LN, ORANGE PARK, FL 320652231 (Tel: 9045429796)

👤
Provider Name / Credentials Updated July 08, 2007

Recorded as ALAN SIEWERTSEN, R.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Dietitian, Registered

🟢
Initial NPI Registration & Enumeration January 25, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1598735359
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: January 25, 2006
Last Update: July 13, 2026
Sole Proprietor: No

Mailing Address

650 Timbermill Ln

Orange Park, FL 320652231

Phone: 9045429796

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.