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Edit this profileAt a glance
- 300 W Huntington Dr, Arcadia, CA 91007
About Dr. Der
Based in Arcadia, CA, Roger E. Der, M.D. is listed in the NPI registry under pathology. Roger graduated from University of Southern California Keck School of Medicine in 1996. Roger is also listed as specializing in anatomic & clinical pathology. According to Medicare claims data, Roger cared for 1,488 Medicare patients across 2,198 services. The services billed most often include pathology examination of tissue using a microscope, intermediate complexity, pathology examination of tissue using a microscope, moderately low complexity, and special stained specimen slides to examine tissue, each additional procedure. NPI 1558355156 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (626) 574-3488
- Email not available
Practice Locations
300 W HUNTINGTON DR
Arcadia, CA 91007
Conditions Evaluated or Diagnosed
Within Pathology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Autoimmune & Joints
Autopsy & Forensic
- Unexplained Cause of Death
Blood & Metabolism
Blood Disorders
- Bleeding Disorders
- Blood Clotting Gene Mutation
- Iron-deficiency anemia
- Leukemia
- Lymphoma
- Multiple Myeloma
- Sickle cell disease
Cancer
- Bladder cancer
- Bone tumors
- Brain tumor
- Breast cancer
- Cervical cancer
- Colon cancer
- Endometrial cancer
- Kidney cancer
- Liver cancer
- Lung cancer
- Oral cavity cancer
- Ovarian cancer
- Pancreatic cancer
- Prostate cancer
- Soft-tissue sarcoma
- Stomach cancer
- Testicular cancer
- Thyroid cancer
Cervical & Gynecologic
Digestive
- Gallbladder inflammation
- H. pylori infection
Digestive System
Endocrine
Genetics
- Inherited Cancer Risk
Hormones
Immune System
- Autoimmune Diseases
Infections
- Hepatitis C
- Lyme disease
- Mononucleosis
- Sexually transmitted infections
Kidney
Liver
Metabolic & Routine Lab
Pregnancy & Fertility
Skin Cancer
Women's Health
Procedures & services
Autopsy & Forensic
- Private Autopsy Service
Blood Tests
- Blood Clotting Tests
- Blood Type Test
- Cholesterol screening
- Complete Blood Count
- Comprehensive Metabolic Panel
- Hemoglobin A1c Test
- Iron Level Blood Test
- Thyroid Blood Test
Cytology
- Body fluid cytology
- Urine cytology test
Cytology & Screening
- Fine-needle aspiration of a neck mass
- Human papillomavirus testing
- Pap Smear Test
- Thyroid Nodule Biopsy Review
Genetic & Molecular Tests
- Cancer Genetic Testing
- Liquid Biopsy
- Paternity DNA Test
- Tumor Biomarker Testing
Genetics
- Chromosome And Genetic Testing
Immune & Allergy Tests
- Allergy Blood Testing
- Autoimmune Antibody Panel
- Celiac Disease Blood Test
Infection Testing
- Blood Culture Test
- H. Pylori Breath Test
- Lyme disease test
Infection Tests
Lab & Blood Tests
- Cardiac enzyme blood test
- Pregnancy blood test
- Sed rate inflammation test
- Testosterone blood test
- Vitamin D blood test
Pathology Review
- Biopsy Second Opinion
- Frozen Section During Surgery
Pregnancy & Fertility
- Miscarriage tissue testing
- Placenta examination
- Sperm count test
Routine Lab Tests
- Colon cancer screening consult
- Urinalysis
- Urine Drug Screen
Tissue Biopsy
- Bone Marrow Biopsy Interpretation
- Breast Biopsy Analysis
- Cervical biopsy lab review
- Colon Polyp Testing
- Kidney Biopsy Examination
- Liver Biopsy Examination
- Lung biopsy lab review
- Lymph Node Biopsy Analysis
- Oral biopsy lab review
- Prostate Biopsy Analysis
- Skin Biopsy Lab Review
- Stomach biopsy lab review
- Uterine biopsy lab review
Procedures Most Often Billed to Medicare
2,198 services · 1,488 patients · 11 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Pathology examination of tissue using a microscope, intermediate complexity | Lab test | 88305 |
733 | More often than most peers in Pathology |
| Pathology examination of tissue using a microscope, moderately low complexity | Lab test | 88304 |
322 | More than most peers in Pathology |
| Special stained specimen slides to examine tissue, each additional procedure | Lab test | 88341 |
294 | More often than most peers in Pathology |
| Preparation of tissue for examination by removing any calcium present | Lab test | 88311 |
262 | More than most peers in Pathology |
| Special stained specimen slides to identify organisms including interpretation and report | Lab test | 88312 |
204 | More often than most peers in Pathology |
| Pathology examination of tissue using a microscope, moderately high complexity | Lab test | 88307 |
100 | As often as other peers in Pathology |
| Cell examination of body fluid, smears | Lab test | 88104 |
85 | More often than most peers in Pathology |
| Special stained specimen slides to examine tissue, initial procedure | Lab test | 88342 |
79 | As often as other peers in Pathology |
| Pathology examination of tissue using a microscope, limited examination | Lab test | 88300 |
60 | More often than most peers in Pathology |
| Pathology examination of specimen during surgery, first tissue block | Lab test | 88331 |
41 | More often than most peers in Pathology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at University of Southern California Keck School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 1996 at University of Southern California Keck School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Roger E. Der?
Roger E. Der is a pathologist in Arcadia, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Pathology”.
NPI registry
What is Roger E. Der's address?
Roger E. Der is listed at 300 W Huntington Dr, Arcadia, CA 91007. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Roger E. Der?
The number on file is (626) 574-3488. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Roger E. Der's NPI number?
Roger E. Der's National Provider Identifier is 1558355156. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Roger E. Der train?
Roger E. Der attended University of Southern California Keck School of Medicine, graduating in 1996. This comes from the CMS National Downloadable File.
CMS public data
How long has Roger E. Der been practicing?
Roger E. Der has 30 years experience. Calculated from a graduation year of 1996, reported in the CMS National Downloadable File.
CMS public data
What procedures does Roger E. Der perform?
According to Medicare billing data, Roger E. Der the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Roger E. Der confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Roger E. Der. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.