DR. DONALD B. LONGJOHN M.D.
NPI 1215949524
Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery in Los Angeles, CA

Q: What is Donald Longjohn's NPI number?

The NPI number for Donald Longjohn is 1215949524. It was assigned to this individual provider in the NPPES registry on August 13, 2006.

Q: What is Donald Longjohn's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Donald Longjohn was last updated on November 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since August 13, 2006PECOS EnrolledAccepts Medicare Assignment

1520 SAN PABLO ST, #2000, LOS ANGELES, CA 90033(323) 442-5860(323) 442-6990 Get Directions Write a Review

NPPES record last updated: November 27, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 7, 2020, Aug 20, 2020, Jun 20, 2016 (3 updates tracked since 2016).

On this page

About Dr. Donald B. Longjohn M.d. NPPES

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

DR. DONALD B. LONGJOHN M.D. (NPI 1215949524) is an individual adult reconstructive orthopaedic surgery provider in Los Angeles, California, licensed in California (G72658) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (1990).

NPPES Registry Identity

NPI1215949524

Entity TypeIndividualMale

Primary Taxonomy207XS0114X

Provider Legal NameDR. DONALD B. LONGJOHNCredential: M.D.

Location Address1520 SAN PABLO ST, #2000Los Angeles, CA 90033-5310

Mailing AddressPo Box 31309Los Angeles, CA 90031-0309 · (323) 442-5860 · Fax (323) 442-6990

Phone(323) 442-5860

Fax(323) 442-6990

Sole ProprietorNo

Medical School CMSUniversity Of Michigan Medical SchoolGraduated 1990

Enumeration DateAugust 13, 2006

Last NPPES UpdateNovember 27, 20233 updates tracked since enumeration

NPPES CertifiedSeptember 7, 2020

✔ NPI 1215949524 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOrthopaedic Surgery · Adult Reconstructive Orthopaedic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207XS0114X

License✔ Licensed in CA · G72658

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.

Also ListedOrthopaedic SurgeryTaxonomy 207X00000X · License G72658 (CA)

1520 SAN PABLO ST, Los Angeles, CA 90033

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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. Donald B. Longjohn 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 ID5698825420

PECOS Enrollment IDI20090616000631

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 Reassignment

Medicare enrollment records show Donald Longjohn reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Usc Care Medical Group, Inc

Same address

General Practice

1520 SAN PABLO ST
Los Angeles, CA 90033

Reassigned Medicare billing, California enrollment
2,445 clinicians in this Medicare group

NPI 1902846306 (323) 442-5955

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 9

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.

331 services278 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.

179 services179 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

165 services108 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

148 services115 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

52 services50 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.

33 services33 patients

Referred Medical Equipment & Supplies CMS DME claims 5

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

Walker, folding, wheeled, adjustable or fixed height E0143

DME-Other DME · category DE000N

2 suppliers24 claims24 services$44.69 avg. paid by Medicare

Lambswool sheepskin pad, any size E0189

DME-Other DME · category DE000N

1 supplier19 claims19 services$39.24 avg. paid by Medicare

Continuous passive motion exercise device for use on knee only E0935

DME-Other DME · category DE000N

1 supplier24 claims465 services$19.24 avg. paid by Medicare

Dynamic adjustable knee extension / flexion device, includes soft interface material E1810

DME-Other DME · category DE000N

1 supplier14 claims14 services$102.93 avg. paid by Medicare

Standard wheelchair K0001

DME-Wheelchairs · category DD000N

1 supplier13 claims13 services$19.08 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 20

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

DR. CAROLINE HWANG M.D.

Internal Medicine (Gastroenterology)

1520 SAN PABLO ST, SUITE 1000
LOS ANGELES, CA 90033

Los Angeles County (323) 442-5100

GISELLE MARIA PETZINGER M.D.

Psychiatry & Neurology (Neurology)

1520 SAN PABLO ST, SUITE 3000
LOS ANGELES, CA 90033

Los Angeles County (323) 442-5710

LIGAYA CASTILLO

Nurse Practitioner

1520 SAN PABLO ST, SUITE 1000
LOS ANGELES, CA 90033

Los Angeles County (323) 442-5100

ERICA ZOE SHOEMAKER MD

Psychiatry & Neurology (Psychiatry)

1520 SAN PABLO ST, STE 1652
LOS ANGELES, CA 90033

Los Angeles County (323) 442-6000

DR. MICHELE TORTORA PATO M.D.

Psychiatry & Neurology (Psychiatry)

1520 SAN PABLO ST, STE1652
LOS ANGELES, CA 90033

Los Angeles County (323) 442-6000

DR. EDY E SOFFER M.D.

Internal Medicine (Gastroenterology)

1520 SAN PABLO ST, SUITE 1000
LOS ANGELES, CA 90033

Los Angeles County (323) 442-5100

DR. TRACY DEBRA LAWRENCE M.D.

Internal Medicine (Cardiovascular Disease)

1520 SAN PABLO ST, SUITE 1000
LOS ANGELES, CA 90033

Los Angeles County (323) 442-5100

CAROLYN L. KALOOSTIAN MD

Family Medicine (Geriatric Medicine)

1520 SAN PABLO ST, 1ST FLOOR
LOS ANGELES, CA 90033

Los Angeles County (323) 442-5900

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 Donald Longjohn's NPI number?

The NPI number for Donald Longjohn is 1215949524. It was assigned to this individual provider in the NPPES registry on August 13, 2006.

Where is Donald Longjohn located?

Donald Longjohn practices at 1520 San Pablo St #2000, Los Angeles, CA 90033. The listed phone number is (323) 442-5860.

What is Donald Longjohn's specialty?

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

Is Donald Longjohn enrolled in Medicare?

Yes. Donald Longjohn 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 organization bills Medicare for Donald Longjohn's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Donald Longjohn reassigns Medicare benefits to Usc Care Medical Group, Inc (Los Angeles, CA). The 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 Donald Longjohn'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 Donald Longjohn was last updated on November 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.