Dr. John Williamson , MD
Surgery • Camp Pendleton, CA
200 Mercy Cirle
Camp Pendleton, CA 92055
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
200 Mercy Cirle
Camp Pendleton, CA 92055
NPPES lists 2 distinct additional practice-address records in Fpo, AP. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $15.70 in 2025
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.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
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 2025.
NPI first issued
2017
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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; Medicare.gov, “Does your provider accept Medicare as full payment?”
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.
Can order Medicare-covered services
CMS lists Dr. Williamson as eligible to order or refer durable medical equipment (DME) for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
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.
Compared with the same specialty in Camp Pendleton and California
16 active clinicians are listed under Surgery with a practice address in Camp Pendleton, CA (3,120 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Camp Pendleton
0% of these 16 clinicians have the CMS telehealth indicator.
25% of these 16 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $97.12 in 2019 to $15.70 in 2025.
- 2019: $97.12
- 2022: $324.78
- 2023: $68.04
- 2025: $15.70
Sources: CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $15.70.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ANI Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
PURIFIED CORTROPHIN GEL | General | $15.70 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-07-17NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSSources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
Uss America, Lha-6
Fpo, AP 966601600
Phone: 6036862572
Naval Hospital Okinawa, Camp Foster
Fpo, AP 96362
Phone: 6036862572
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Surgery
Doctor of Medicine (M.D.)
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Nurse Practitioner - Psychiatric/Mental Health
Psychiatric-Mental Health Nurse Practitioner
Dentist - Oral and Maxillofacial Surgery
Doctor of Dental Surgery
Physician Assistant
Physician Assistant (Certified)
Emergency Medicine
Doctor of Osteopathic Medicine (D.O.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 200 MERCY CIRLE, CAMP PENDLETON, CA 92055 (Tel: 7607251288)
Registered at USS AMERICA, LHA-6, FPO, AP 966601600 (Tel: 6036862572)
Registered at PO BOX 532, WILDER, VT 050880532 (Tel: 6036862572)
Surgery (license number reported to NPPES: PA MD467935)
NPI status registered as active in NPPES database
Registered at 230 N BROAD ST, HAHNEMANN UNIVERSITY HOSPITAL, PHILADELPHIA, PA 19102 (Tel: 6036862572)
Registered at 511 N BROAD ST APT 704, PHILADELPHIA, PA 191233235 (Tel: 6036862572)
Recorded as JOHN WILLIAMSON, MD
Surgery (license number reported to NPPES: PA MT214514)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery Specialists in Camp Pendleton
Mailing Address
Po Box 532
Wilder, VT 050880532
Phone: 6036862572