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DR. WILLIAM T LONG M.D.
NPI 1023067055
Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery in Los Angeles, CA

Active since May 08, 2006PECOS EnrolledAccepts Medicare Assignment
1300 N VERMONT AVE STE 100, LOS ANGELES, CA 90027(323) 913-4300 Get Directions Write a Review

NPPES record last updated: October 11, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 11, 2020, Oct 2, 2020, Nov 16, 2016 (3 updates tracked since 2016).

About Dr. William T Long M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM T LONG M.D. (NPI 1023067055) is an individual adult reconstructive orthopaedic surgery provider in Los Angeles, California, licensed in California (G60239) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (1985).

NPPES Registry Identity

NPI1023067055
Entity TypeIndividualMale
Primary Taxonomy207XS0114X
Provider Legal NameDR. WILLIAM T LONGCredential: M.D.
Location Address1300 N VERMONT AVE STE 100Los Angeles, CA 90027-6061
Mailing Address1300 N Vermont Ave Ste 100Los Angeles, CA 90027-6061 · (323) 913-4300
Phone(323) 913-4300
Sole ProprietorYes
Medical School CMSUniversity Of California, San Diego School Of MedicineGraduated 1985
Enumeration DateMay 8, 2006
Last NPPES UpdateOctober 11, 20203 updates tracked since enumeration
NPPES CertifiedOctober 10, 2020
✔ NPI 1023067055 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Adult Reconstructive Orthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207XS0114X
License✔ Licensed in CA · G60239
Definition
Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, adult reconstructive orthopaedic surgeons deal with reconstructive procedures such as joint arthroplasty (i.e., hip and knee), osteotomy, arthroscopy, soft-tissue reconstruction, and a variety of other adult reconstructive surgical procedures.
1300 N VERMONT AVE STE 100, Los Angeles, CA 90027
Open in Google Maps ↗

Other Identifiers 1

Medicaid00G602390CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William T Long M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2163313966
PECOS Enrollment IDI20040322001483
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show William Long reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Pacifica Foundation LLC.
Same address
Adult Reconstructive Orthopaedic Surgery
1300 N VERMONT AVE STE 407
Los Angeles, CA 90027
  • Reassigned Medicare billing, California enrollment
  • 5 clinicians in this Medicare group
NPI 1386352466 (323) 913-4524
William T Long MD Inc A California Professional Medical Corporation
Same address
Adult Reconstructive Orthopaedic Surgery
1300 N VERMONT AVE STE 100
Los Angeles, CA 90027
  • Reassigned Medicare billing, California enrollment
NPI 1881030112 (323) 913-4300

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
176 services136 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
91 services91 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
40 services35 patients
Replacement of knee joint, both sides of knee 27447
A bilateral knee joint replacement is a procedure where the damaged parts of both your knee joints are replaced with artificial parts. It aims to relieve pain and improve mobility. The process involves a surgical operation under anesthesia.
26 services24 patients
Replacement of thigh bone and hip joint with prosthesis 27130
This procedure, known as hip arthroplasty, involves replacing your damaged thigh bone and hip joint with artificial parts, called a prosthesis. It helps relieve pain, improve mobility, and enhance your quality of life.
17 services17 patients
Replacement of knee joint on side of knee 27446
A knee joint replacement on one side, also known as unicompartmental knee replacement, is a surgical procedure where damaged parts of the knee joint are replaced with artificial parts. This helps to reduce pain and improve mobility. It's typically done under general anesthesia.
16 services15 patients

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Neuromuscular stimulator, electronic shock unit E0745
DME-Other DME · category DE000N
1 supplier12 claims12 services$65.76 avg. paid by Medicare
Dynamic adjustable knee extension / flexion device, includes soft interface material E1810
DME-Other DME · category DE000N
2 suppliers15 claims15 services$96.30 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

H MICHAEL MYNATT M D INC
Orthopaedic Surgery
1300 N VERMONT AVE STE 100
LOS ANGELES, CA 90027
Los Angeles County (323) 913-4300
PACIFICA HEALTH MEDICAL GROUP PC
Orthopaedic Surgery (Adult Reconstructive Orthopaedic Surgery)
1300 N VERMONT AVE STE 100
LOS ANGELES, CA 90027
Los Angeles County (323) 913-4300
WILLIAM T LONG MD INC A CALIFORNIA PROFESSIONAL MEDICAL CORPORATION
Orthopaedic Surgery (Adult Reconstructive Orthopaedic Surgery)
1300 N VERMONT AVE STE 100
LOS ANGELES, CA 90027
Los Angeles County (323) 913-4300

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Long's NPI number?

The NPI number for William Long is 1023067055. It was assigned to this individual provider in the NPPES registry on May 8, 2006.

Where is William Long located?

William Long practices at 1300 N Vermont Ave Ste 100, Los Angeles, CA 90027. The listed phone number is (323) 913-4300.

What is William Long's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Adult Reconstructive Orthopaedic Surgery, with taxonomy code 207XS0114X.

Is William Long enrolled in Medicare?

Yes. William Long is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for William Long's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Long reassigns Medicare benefits to 2 organizations: Pacifica Foundation LLC. (Los Angeles, CA) and William T Long MD Inc A California Professional Medical Corporation (Los Angeles, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Long's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Long was last updated on October 11, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.