DR. GREGORY DEAN DIETRICH MD
NPI 1306831698
Orthopaedic Surgery - Orthopaedic Surgery of the Spine in Lewiston, ID

Q: What is Gregory Dietrich's NPI number?

The NPI number for Gregory Dietrich is 1306831698. It was assigned to this individual provider in the NPPES registry on September 13, 2005.

Q: What is Gregory Dietrich's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Orthopaedic Surgery of the Spine, with taxonomy code 207XS0117X.

Q: When was this NPI record last updated?

The NPPES record for Gregory Dietrich was last updated on June 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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 September 13, 2005PECOS EnrolledAccepts Medicare Assignment

320 WARNER DRIVE, LEWISTON, ID 83501(208) 743-3523(208) 746-8741 Get Directions Write a Review

NPPES record last updated: June 30, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Gregory Dean Dietrich Md NPPES

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

DR. GREGORY DEAN DIETRICH MD (NPI 1306831698) is an individual orthopaedic surgery of the spine provider in Lewiston, Idaho, licensed in Idaho (M7482) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with St Joseph Regional Medical Center, and is a graduate of Loma Linda University School Of Medicine (1992).

NPPES Registry Identity

NPI1306831698

Entity TypeIndividualMale

Primary Taxonomy207XS0117X

Provider Legal NameDR. GREGORY DEAN DIETRICHCredential: MD

Location Address320 WARNER DRIVELewiston, ID 83501

Mailing Address320 Warner DrLewiston, ID 83501-4441 · (208) 743-3523 · Fax (208) 746-8741

Phone(208) 743-3523

Fax(208) 746-8741

Sole ProprietorNo

Medical School CMSLoma Linda University School Of MedicineGraduated 1992

Enumeration DateSeptember 13, 2005

Last NPPES UpdateJune 30, 2026

NPPES CertifiedJune 30, 2026

✔ NPI 1306831698 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Orthopaedic Surgery of the SpineAllopathic & Osteopathic Physicians

Taxonomy Code207XS0117X

Licenses✔ Licensed in ID · M7482✔ Licensed in WA · 00034506

Definition

Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, orthopaedic surgeons of the spine deal with the evaluation and nonoperative and operative treatment of the full spectrum of primary spinal disorders including trauma, degenerative, deformity, tumor, and reconstructive.

320 WARNER DRIVE, Lewiston, ID 83501

Open in Google Maps ↗

Other Identifiers 4

Other74823ID · Bci

Medicaid805208800ID

Other000010004322ID · Regence

Medicaid8204851WA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Molina Healthcare, PacificSource Health Plans and more.Insurance ›

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. Gregory Dean Dietrich Md 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 ID1052212990

PECOS Enrollment IDI20100506000720, I20100921001481

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

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

Catalyst Medical Group, PLLC

1.1 mi

Multi-Specialty

2315 8TH ST
Lewiston, ID 83501

Reassigned Medicare billing, Idaho and Washington enrollments
34 clinicians in this Medicare group

NPI 1912458787 (208) 746-1383

St Joseph Hospital LLC

2.4 mi

Internal Medicine

415 6TH STREET, PHYSICIAN SERVICES
Lewiston, ID 83501

Reassigned Medicare billing, Idaho and Washington enrollments
Also billed through NPI 1043744287 (Washington)
164 clinicians in this Medicare group

NPI 1205368404 (208) 750-7462

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 27

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.

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

246 services33 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

117 services77 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.

106 services88 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

82 services82 patients

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.

72 services64 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.

67 services59 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.

57 services57 patients

Insertion of cage or mesh device to spine bone and disc space during spine fusion 22853

Spine fusion is a procedure to join two or more vertebrae. During this process, a cage or mesh device is inserted into the spine bone and disc space. This helps to stabilize the spine, reduce pain, and improve functionality. The device acts as a bridge for new bone to grow on.

46 services41 patients

X-ray of upper spine, 2-3 views 72040

An X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.

46 services28 patients

Partial removal of spine bone with release of lower spinal cord and/or nerves, 1 segment 63047

This procedure involves removing part of a spine bone to alleviate pressure on the lower spinal cord and/or nerves. It targets a single segment of the spine, improving mobility and reducing pain. It's a common treatment for conditions like herniated discs or spinal stenosis.

44 services44 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

42 services33 patients

Aspiration of bone marrow for spine bone graft 20939

Aspiration of bone marrow for spine bone graft is a procedure where a small amount of bone marrow is extracted, usually from the hip, and then used to help new bone grow in the spine. This can aid in spinal fusion surgeries, enhancing recovery and stability.

29 services29 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

29 services27 patients

Placement of stabilizing device to back of 1 spine bone in neck 22840

This procedure involves positioning a stabilizing device onto a single spinal bone in the neck. The goal is to provide support and prevent movement that could cause discomfort or further injury. It's performed by trained specialists under anesthesia.

28 services28 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.

26 services24 patients

Fusion of spine in lower back with partial removal of spine bone and disc 22633

This procedure, called lumbar spinal fusion, involves joining two or more vertebrae in your lower back. It includes a partial removal of a spine bone and disc to alleviate pain and improve stability. The goal is to reduce motion between vertebrae and prevent nerve irritation.

25 services25 patients

Partial removal of spine bone with release of spinal cord and/or nerves, each additional segment 63048

This procedure involves the partial removal of a bone in your spine to alleviate pressure on your spinal cord or nerves. It may be performed on multiple spine segments depending on your condition. The aim is to improve mobility and reduce pain or discomfort.

24 services14 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

22 services21 patients

Fusion of lower spine bone through abdomen with partial removal of disc 22558

This procedure involves merging the bones in your lower spine through an abdominal approach. A portion of the disc, which acts like a cushion between your vertebrae, is partially removed. The goal is to alleviate back pain by limiting movement in the problem area of your spine.

21 services21 patients

Partial removal of bone of single segment of spine in lower back with release of spinal cord and/or nerves during fusion of spine in lower back 63052

This procedure involves the partial removal of a bone segment in your lower back to relieve pressure on your spinal cord or nerves. It's usually done during a spinal fusion in the lower back, which helps to stabilize your spine by joining two or more vertebrae together.

20 services20 patients

Fusion of spine in lower back 22612

Fusion of the spine in the lower back, also known as lumbar spinal fusion, is a surgery aimed to join, or fuse, two or more vertebrae in your lower back. This procedure can help alleviate pain and improve stability by reducing movement between the vertebrae.

17 services17 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

Placement of stabilizing device to back, 3-6 spine bone segments 22842

This procedure involves placing a device on your back to stabilize 3-6 spine bone segments. It aids in maintaining spine alignment and reducing pain. The device is secured to the bones, providing support and promoting healing.

16 services16 patients

Fusion of upper spine bone with removal of disc and release of spinal cord or nerve, 1 disc 22551

This procedure involves fusing together the bones in the upper spine to stabilize it. A disc is removed to ease pressure on the spinal cord or nerve. This helps reduce pain and improve mobility. This is a common treatment for certain spinal conditions.

14 services14 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

14 services13 patients

Graft of donor bone to spine 20931

A graft of donor bone to the spine is a procedure where a piece of bone from a donor is attached to your spine to help it heal or improve its structure. This is often done to strengthen the spine or aid in recovery from injury or disease.

13 services13 patients

Placement of stabilizing device to front, 2-3 spine bone segments 22845

This procedure involves positioning a stabilizing device on the front of 2-3 segments of your spine. It's designed to provide support and stability to your spine, potentially alleviating discomfort and improving mobility.

13 services13 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St Joseph Regional Medical Center

Acute Care Hospitals · Lewiston, ID

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number130003

Location415 Sixth StreetLewiston, ID 83501 · Nez Perce County

Emergency services Birthing friendly

Syringa General Hospital

Critical Access Hospitals · Grangeville, ID

OwnershipGovernment - Hospital District or Authority

CMS Certification Number131315

Location607 W Main StreetGrangeville, ID 83530 · Idaho County

Emergency services

Clearwater Valley Hospital & Clinics

Critical Access Hospitals · Orofino, ID

OwnershipVoluntary non-profit - Private

CMS Certification Number131320

Location301 Cedar StreetOrofino, ID 83544 · Clearwater County

Emergency services

St Marys Hospital And Clinics

Critical Access Hospitals · Cottonwood, ID

OwnershipVoluntary non-profit - Private

CMS Certification Number131321

Location701 Lewiston StCottonwood, ID 83522 · Idaho County

Emergency services

Tri-State Memorial Hospital

Critical Access Hospitals · Clarkston, WA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number501332

Location1221 Highland AvenueClarkston, WA 99403 · Asotin County

Emergency services

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.

Lumbar orthosis, sagittal control, with rigid anterior and posterior panels, posterior extends from l-1 to below l-5 vertebra, produces intracavitary pressure to reduce load on the intervertebral discs, includes straps, closures, may include padding, shoulder straps, pendulous abdomen design, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise L0627

DME-Orthotic Devices · category DF007N

2 suppliers26 claims26 services$330.66 avg. paid by Medicare

Lumbar-sacral orthosis, sagittal-coronal control, with rigid anterior and posterior frame/panel(s), posterior extends from sacrococcygeal junction to t-9 vertebra, lateral strength provided by rigid lateral frame/panel(s), produces intracavitary pressure to reduce load on intervertebral discs, includes straps, closures, may include padding, shoulder straps, pendulous abdomen design, prefabricated, off-the-shelf L0650

DME-Orthotic Devices · category DF007N

1 supplier22 claims22 services$675.44 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 2

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

MR. JEREMY B OSTERMILLER PAC

Physician Assistant

320 WARNER DRIVE
LEWISTON, ID 83501

Nez Perce County (208) 791-9889

MR. LEROY NEAL KEENE PAC

Physician Assistant

320 WARNER DRIVE
LEWISTON, ID 83501

Nez Perce County (208) 798-5147

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 Gregory Dietrich's NPI number?

The NPI number for Gregory Dietrich is 1306831698. It was assigned to this individual provider in the NPPES registry on September 13, 2005.

Where is Gregory Dietrich located?

Gregory Dietrich practices at 320 Warner Drive, Lewiston, ID 83501. The listed phone number is (208) 743-3523.

What is Gregory Dietrich's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Orthopaedic Surgery of the Spine, with taxonomy code 207XS0117X.

Is Gregory Dietrich enrolled in Medicare?

Yes. Gregory Dietrich 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 Gregory Dietrich's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Dietrich reassigns Medicare benefits to 2 organizations: Catalyst Medical Group, PLLC (Lewiston, ID) and St Joseph Hospital LLC (Lewiston, ID). 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 Gregory Dietrich's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Dietrich accept?

Health plans from Ambetter Health, Molina Healthcare, PacificSource Health Plans and Providence Health Plan list Gregory Dietrich as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Gregory Dietrich affiliated with any hospitals?

According to CMS data, Gregory Dietrich is affiliated with St Joseph Regional Medical Center, Syringa General Hospital, Clearwater Valley Hospital & Clinics, St Marys Hospital And Clinics and Tri-State Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Gregory Dietrich was last updated on June 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.