Deactivated NPI 1538280748 Deactivated / Inactive NPI Male Practitioner

Dr. Donald Curry Preston , MD

Internal Medicine • Dededo, GU

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.

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Notice of NPI Deactivation & Inactive Practice Status

According to official public domain records published by CMS (Centers for Medicare & Medicaid Services) in the National Provider Identifier (NPPES) Registry, Dr. Donald Preston has officially deactivated this NPI record and ceased active healthcare practice.

Registration / Start Date April 03, 2007

NPI Deactivation Date October 09, 2025

Total Practice Duration ~18 Years of Practice (2007 – 2025)

Professional Overview & Biography Verified Profile Summary

Dr. Donald Preston, MD was a registered Internal Medicine practicing in Dededo, GU. Throughout an active medical career spanning 18 years, Dr. Preston provided care at the practice location at 612 N MARINE DR until profile deactivation on 2025-10-09.

Historical Medicare Part B clinical services included established patient outpatient office visit, routine ekg using at least 12 leads including interpretation and report, outpatient office visit. Public procedure reimbursement records and service volume details are provided below for historical transparency.

Practice Location & Contact Primary Location

Practice Address

612 N Marine Dr
#8

Dededo, GU 96929

Telephone 6714727047

Fax 6716332329

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Dededo, GU

Active Practitioner

Practitioner Clinical Experience

Active

City Avg: 18.0 Yrs

State Avg: 27.1 Yrs

Regional Practice Density

3 Specialists

Practicing in Dededo, GU (29 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

1.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	514	206	$94.48	$92.22
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	46	36	$132.79	$130.76
93000 Routine ekg using at least 12 leads including interpretation and report	15	15	$14.95	$14.71

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	487	184	$91.81	$90.22
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	66	41	$24.71	$24.00
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	27	23	$129.50	$127.43
93000 Routine ekg using at least 12 leads including interpretation and report	22	22	$14.97	$13.94

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	489	201	$93.85	$92.37
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	229	111	$24.99	$24.51
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	59	42	$132.44	$129.27
93000 Routine ekg using at least 12 leads including interpretation and report	26	24	$14.88	$14.72
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$120.02	$118.71

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	436	176	$95.77	$93.98
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	90	55	$136.16	$133.53
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	78	63	$25.35	$24.58
93000 Routine ekg using at least 12 leads including interpretation and report	21	21	$15.76	$15.76

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	289	118	$80.83	$80.57
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	133	62	$116.87	$116.32
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	17	16	$25.76	$25.57
93000 Routine ekg using at least 12 leads including interpretation and report	13	13	$18.61	$18.56

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	256	125	$79.91	$76.62
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	81	47	$116.62	$111.46

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	316	139	$75.60	$73.31
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	130	65	$110.62	$107.07
93000 Routine ekg using at least 12 leads including interpretation and report	20	17	$17.91	$17.38

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	388	146	$75.37	$71.80
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	129	69	$110.17	$106.88
93000 Routine ekg using at least 12 leads including interpretation and report	20	18	$17.70	$17.12

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License GU M915

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Career & Practice History Timeline

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

8 Historical Events

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NPI Profile Deactivated October 09, 2025

Record deactivated on October 09, 2025

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Medical Taxonomy / Specialty Registered (Primary Specialty) August 24, 2025

Internal Medicine (License #M915 in GU)

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NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

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Updated Practice Location July 08, 2007

Registered at 612 N MARINE DR, #8, DEDEDO, GU 96929 (Tel: 6714727047)

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Updated Business Mailing Address July 08, 2007

Registered at 612 N MARINE DR, #8, DEDEDO, GU 96929 (Tel: 6714727047)

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Provider Name / Credentials Updated July 08, 2007

Recorded as DONALD PRESTON, MD

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

Internal Medicine (License #M915 in GU)

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Initial NPI Registration & Enumeration April 03, 2007

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews

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NPI Administrative Meta

NPI Number: 1538280748

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: April 03, 2007

Last Update: July 08, 2007

Deactivation Date: October 09, 2025

Update or Correct Profile

Mailing Address

612 N Marine Dr, #8

Dededo, GU 96929

Phone: 6714727047

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.